{"id":4179,"date":"2025-10-21T07:31:35","date_gmt":"2025-10-21T07:31:35","guid":{"rendered":"https:\/\/donyanchem.com\/?p=4179"},"modified":"2025-10-31T03:01:33","modified_gmt":"2025-10-31T03:01:33","slug":"why-is-pu-foam-sealant-shrinking-after-drying","status":"publish","type":"post","link":"https:\/\/donyanchem.com\/tr\/why-is-pu-foam-sealant-shrinking-after-drying\/","title":{"rendered":"PU K\u00f6p\u00fck S\u0131zd\u0131rmazl\u0131k Maddesi Kuruduktan Sonra Neden B\u00fcz\u00fcl\u00fcr?"},"content":{"rendered":"<p><strong><a href=\"https:\/\/donyanchem.com\/tr\/product-category\/polyurethane-foam\/\">PU (Poli\u00fcretan) k\u00f6p\u00fck s\u0131zd\u0131rmazl\u0131k maddesi<\/a><\/strong> \u0130n\u015faat ve kendin yap projelerinin vazge\u00e7ilmezi olup, ola\u011fan\u00fcst\u00fc s\u0131zd\u0131rmazl\u0131k, yal\u0131t\u0131m ve bo\u015fluk doldurma \u00f6zellikleriyle \u00fcnl\u00fcd\u00fcr.<\/p>\n\n\n\n<p>Ancak kullan\u0131c\u0131lar, k\u00f6p\u00fck tamamen k\u00fcrlendikten sonra g\u00f6zle g\u00f6r\u00fcl\u00fcr bir b\u00fcz\u00fclme veya y\u00fczeylerden ayr\u0131lma g\u00f6zlemlediklerinde bazen endi\u015feye kap\u0131l\u0131rlar. Bu durum, contay\u0131 tehlikeye atabilir, yal\u0131t\u0131m de\u011ferini d\u00fc\u015f\u00fcrebilir ve hava ak\u0131mlar\u0131na veya nem giri\u015fine neden olabilir. Bu b\u00fcz\u00fclmenin ard\u0131ndaki nedenleri anlamak, profesyonel ve kal\u0131c\u0131 sonu\u00e7lar elde etmek i\u00e7in \u00e7ok \u00f6nemlidir. Bu makale, \u00f6zellikle kapal\u0131 h\u00fccreli PU k\u00f6p\u00fck yap\u0131s\u0131n\u0131n rol\u00fc ve kimyasal s\u00fcre\u00e7lere odaklanarak, PU k\u00f6p\u00fck s\u0131zd\u0131rmazl\u0131k malzemesinin b\u00fcz\u00fclmesinin bilimsel ve pratik nedenlerini incelemektedir.<\/p>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-3b66b4a2\"><h2 class=\"uagb-heading-text\"><strong>PU K\u00f6p\u00fc\u011f\u00fcn Temel Yap\u0131s\u0131: Kapal\u0131 H\u00fccreli Bir Yap\u0131<\/strong><\/h2><\/div>\n\n\n\n<p>B\u00fcz\u00fclmenin neden olu\u015ftu\u011funu anlamak i\u00e7in \u00f6ncelikle k\u00fcrlenmi\u015f PU k\u00f6p\u00fc\u011f\u00fcn temel anatomisini anlamak gerekir. Genle\u015fen k\u00f6p\u00fck s\u0131zd\u0131rmazl\u0131k malzemelerinin \u00e7o\u011fu, kapal\u0131 h\u00fccreli bir PU k\u00f6p\u00fck yap\u0131s\u0131 olu\u015fturmak \u00fczere tasarlanm\u0131\u015ft\u0131r. <\/p>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-7c021a98\"><h2 class=\"uagb-heading-text\"><strong>Nedir? <a href=\"https:\/\/www.americanchemistry.com\/chemistry-in-america\/chemistry-in-polyurethanes\" target=\"_blank\" rel=\"noopener\">Kapal\u0131 H\u00fccreli Pu K\u00f6p\u00fck<\/a>?<\/strong> <\/h2><\/div>\n\n\n\n<p>Kapal\u0131 h\u00fccreli bir k\u00f6p\u00fckte, genle\u015fme s\u0131ras\u0131nda olu\u015fan gaz kabarc\u0131klar\u0131 (h\u00fccreler) poli\u00fcretan polimer duvarlarla tamamen \u00e7evrelenmi\u015ftir. Bu h\u00fccreler birbirinden izole edilerek, k\u00fc\u00e7\u00fck, gaz dolu b\u00f6lmelerden olu\u015fan bir matris olu\u015fturur. Bu yap\u0131, k\u00f6p\u00fc\u011f\u00fcn temel faydalar\u0131ndan sorumludur: <\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Y\u00fcksek R-De\u011feri (Yal\u0131t\u0131m): S\u0131kl\u0131kla d\u00fc\u015f\u00fck iletkenli\u011fe sahip bir \u00fcfleme maddesi olan s\u0131k\u0131\u015fm\u0131\u015f gaz, \u0131s\u0131y\u0131 zay\u0131f bir \u015fekilde iletir ve m\u00fckemmel bir \u0131s\u0131 yal\u0131t\u0131m\u0131 sa\u011flar.<\/li>\n\n\n\n<li>Nem ve Buhar Bariyeri: S\u00fcrekli polimer duvar, su ve hava s\u0131zmas\u0131na kar\u015f\u0131 bariyer g\u00f6revi g\u00f6r\u00fcr.<\/li>\n\n\n\n<li>Yap\u0131sal Sertlik: H\u00fccre duvarlar\u0131 k\u00f6p\u00fc\u011f\u00fcn dayan\u0131kl\u0131l\u0131\u011f\u0131na ve bas\u0131nca kar\u015f\u0131 diren\u00e7 kabiliyetine katk\u0131da bulunur.<\/li>\n<\/ul>\n\n\n\n<p>Ancak bu yap\u0131, PU k\u00f6p\u00fck dolgu macununun b\u00fcz\u00fclme potansiyelinin de merkezinde yer al\u0131r. Bu h\u00fccrelerin b\u00fct\u00fcnl\u00fc\u011f\u00fc ve i\u00e7 bas\u0131nc\u0131 sabit de\u011fildir ve zamanla de\u011fi\u015ferek boyutsal dengesizli\u011fe yol a\u00e7abilir. <\/p>\n\n\n\n<p>Poli\u00fcretan k\u00f6p\u00fck kimyas\u0131 ve h\u00fccre yap\u0131s\u0131 hakk\u0131nda detayl\u0131 teknik a\u00e7\u0131klama i\u00e7in Amerikan Kimya Konseyi&#039;nin Poli\u00fcretan B\u00f6l\u00fcm\u00fc m\u00fckemmel kaynaklar sunmaktad\u0131r. <\/p>\n\n\n\n<div class=\"wp-block-uagb-image uagb-block-9791eaee wp-block-uagb-image--layout-default wp-block-uagb-image--effect-static wp-block-uagb-image--align-none\"><figure class=\"wp-block-uagb-image__figure\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" srcset=\"https:\/\/donyanchem.com\/wp-content\/uploads\/2025\/09\/glo-construction-foams10_16-9-1024x576.webp ,https:\/\/donyanchem.com\/wp-content\/uploads\/2025\/09\/glo-construction-foams10_16-9.webp 780w, https:\/\/donyanchem.com\/wp-content\/uploads\/2025\/09\/glo-construction-foams10_16-9.webp 360w\" sizes=\"auto, (max-width: 480px) 150px\" src=\"https:\/\/i0.wp.com\/donyanchem.com\/wp-content\/uploads\/2025\/09\/glo-construction-foams10_16-9.webp?resize=1024%2C576&#038;ssl=1\" alt=\"Donyan in\u015faat i\u00e7in PU k\u00f6p\u00fck s\u0131zd\u0131rmazl\u0131k maddesi \" class=\"uag-image-4127\" width=\"1024\" height=\"576\" title=\"Donyan PU k\u00f6p\u00fck in\u015faat i\u00e7in\" role=\"img\"\/><\/figure><\/div>\n\n\n\n<p><\/p>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-172140fd\"><h3 class=\"uagb-heading-text\"><strong>Birincil Su\u00e7lular: Nedenlerinin \u00c7\u00f6z\u00fclmesi <a href=\"https:\/\/www.polyurethane.org\/\" target=\"_blank\" rel=\"noopener\">PU K\u00f6p\u00fck<\/a> S\u0131zd\u0131rmazl\u0131k Malzemesinin B\u00fcz\u00fclmesi<\/strong><\/h3><\/div>\n\n\n\n<p>B\u00fcz\u00fclme tek ba\u015f\u0131na bir sorun de\u011fil, kimyasal ve fiziksel fakt\u00f6rlerin bir araya gelmesinin bir sonucudur. En \u00f6nemli nedenler, kapal\u0131 h\u00fccreli PU k\u00f6p\u00fck yap\u0131s\u0131 i\u00e7inde s\u0131k\u0131\u015fan gazlarla ilgilidir.<\/p>\n\n\n\n<p><strong>1. Gaz Dif\u00fczyonu ve Termal Denge (En Yayg\u0131n Neden)<\/strong> <\/p>\n\n\n\n<p>Bu, normal, minimal b\u00fcz\u00fclmenin bask\u0131n bilimsel nedenidir ve daha \u015fiddetli vakalar\u0131 a\u00e7\u0131klayabilir.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>K\u00fcrleme S\u00fcreci: K\u00f6p\u00fck kutudan \u00e7\u0131kar\u0131ld\u0131\u011f\u0131nda s\u0131v\u0131 haldedir. Kutunun i\u00e7indeki bir itici gaz ve reaksiyona girerek gaz \u00fcreten bir kimyasal \u015fi\u015firme maddesi, k\u00f6p\u00fc\u011f\u00fcn h\u0131zla genle\u015fmesine neden olur. Bu a\u015famada h\u00fccreleri dolduran birincil gaz genellikle CO\u2082 (izosiyanat ve su aras\u0131ndaki reaksiyondan) ve potansiyel olarak d\u00fc\u015f\u00fck \u0131s\u0131 iletkenli\u011fine sahip di\u011fer \u015fi\u015firme maddelerinin bir kar\u0131\u015f\u0131m\u0131d\u0131r.<\/li>\n\n\n\n<li>K\u00f6p\u00fc\u011f\u00fcn &quot;Solunum&quot;u: K\u00f6p\u00fck geni\u015fledikten ve kabuk olu\u015ftuktan sonra, i\u00e7 gazlar d\u0131\u015f ortamla dengelenmeye ba\u015flar. CO\u2082 olduk\u00e7a \u00e7\u00f6z\u00fcn\u00fcrd\u00fcr ve k\u00f6p\u00fck h\u00fccrelerinden nispeten h\u0131zl\u0131 bir \u015fekilde d\u0131\u015far\u0131 yay\u0131l\u0131r. Ayn\u0131 anda, atmosferik hava (\u00e7o\u011funlukla azot ve oksijen) h\u00fccrelere yay\u0131l\u0131r, ancak bu s\u00fcre\u00e7 daha yava\u015ft\u0131r.<\/li>\n\n\n\n<li>Bas\u0131n\u00e7 Dengesizli\u011fi: H\u0131zl\u0131 CO\u2082 kayb\u0131, hava tamamen CO\u2082&#039;yi yerine koyamadan h\u00fccrelerin i\u00e7inde ge\u00e7ici bir vakum veya negatif bas\u0131n\u00e7 olu\u015fturur. Bu durum, h\u00fccrelerin hafif\u00e7e b\u00fcz\u00fclmesine ve k\u00f6p\u00fc\u011f\u00fcn hacminde genel bir azalmaya neden olur. Bu dif\u00fczyon s\u00fcreci s\u00fcreklidir ve s\u0131cakl\u0131ktan etkilenir. K\u00f6p\u00fck, atmosfer bas\u0131nc\u0131 ve gaz bile\u015fimiyle denge durumuna ula\u015ft\u0131\u011f\u0131nda, b\u00fcz\u00fclme stabilize olur. <\/li>\n<\/ul>\n\n\n\n<p>Y\u00fcksek kaliteli k\u00f6p\u00fckler bu etkiyi en aza indirecek \u015fekilde form\u00fcle edilmi\u015ftir, ancak bu, malzemenin temel bir \u00f6zelli\u011fidir. K\u00f6t\u00fc form\u00fcle edilmi\u015f veya eski k\u00f6p\u00fckler a\u015f\u0131r\u0131 gaz dif\u00fczyonuna maruz kalabilir ve bu da PU k\u00f6p\u00fck s\u0131zd\u0131rmazl\u0131k malzemesinin daha belirgin \u015fekilde b\u00fcz\u00fclmesine neden olabilir.<\/p>\n\n\n\n<p><strong>2. Uygunsuz veya Eksik K\u00fcrleme<\/strong> <\/p>\n\n\n\n<p>PU k\u00f6p\u00fck, havadan ve uyguland\u0131\u011f\u0131 y\u00fczeyden gelen nemle reaksiyona girerek k\u00fcrlenir. <\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Nem Eksikli\u011fi: K\u00f6p\u00fck \u00e7ok kuru ko\u015fullarda (d\u00fc\u015f\u00fck nem) veya so\u011fuk, kuru bir y\u00fczeye uygulan\u0131rsa, k\u00fcrlenme reaksiyonu yava\u015flar veya durur. D\u0131\u015f y\u00fczey kabuk ba\u011flayabilir, ancak i\u00e7 k\u0131s\u0131m yumu\u015fak ve k\u00fcrlenmemi\u015f kal\u0131r. \u0130\u00e7 yap\u0131 asla tam olarak mukavemetini kazanamad\u0131\u011f\u0131 i\u00e7in, gaz dif\u00fczyonundan kaynaklanan i\u00e7 bas\u0131n\u00e7lara dayanamaz ve bu da \u00e7\u00f6kmeye ve \u00f6nemli \u00f6l\u00e7\u00fcde b\u00fcz\u00fclmeye neden olur.<\/li>\n\n\n\n<li>Uygulama Kal\u0131nl\u0131\u011f\u0131: A\u015f\u0131r\u0131 kal\u0131n bir k\u00f6p\u00fck boncu\u011fu uygulamak sorunlu olabilir. D\u0131\u015f katman sertle\u015ferek sert bir kabuk olu\u015fturur, nemi etkili bir \u015fekilde d\u0131\u015far\u0131da tutar ve i\u00e7 \u00e7ekirde\u011fin tam olarak tepki verip sertle\u015fmesini engeller. \u00c7ekirdeksiz bu \u00e7ekirdek zay\u0131f kal\u0131r ve zamanla b\u00fcz\u00fclebilir.<\/li>\n<\/ul>\n\n\n\n<p><strong>3. Uygulama S\u0131ras\u0131nda ve Sonras\u0131nda S\u0131cakl\u0131k Dalgalanmalar\u0131<\/strong> <\/p>\n\n\n\n<p>S\u0131cakl\u0131k PU k\u00f6p\u00fc\u011f\u00fcn davran\u0131\u015f\u0131nda kritik bir fakt\u00f6rd\u00fcr.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Uygulama S\u0131ras\u0131nda: K\u00f6p\u00fck kutusu oda s\u0131cakl\u0131\u011f\u0131nda olmal\u0131d\u0131r (genellikle 20-25\u00b0C veya 68-77\u00b0F civar\u0131nda). Kutu veya alt tabaka \u00e7ok so\u011fuksa, kimyasal reaksiyon engellenir. K\u00f6p\u00fck d\u00fczg\u00fcn bir \u015fekilde genle\u015fmez ve h\u00fccre yap\u0131s\u0131 zay\u0131f olabilir, bu da daha sonra \u0131s\u0131nd\u0131k\u00e7a b\u00fcz\u00fclmeye e\u011filimli hale gelir.<\/li>\n\n\n\n<li>K\u00fcrlenme Sonras\u0131 (Is\u0131l Genle\u015fme\/B\u00fcz\u00fclme): \u00c7o\u011fu malzeme gibi, k\u00fcrlenmi\u015f kapal\u0131 h\u00fccreli PU k\u00f6p\u00fck de s\u0131cakl\u0131k de\u011fi\u015fimleriyle genle\u015fir ve b\u00fcz\u00fcl\u00fcr. \u00c7ok so\u011fuk bir g\u00fcnde b\u00fcy\u00fck bir k\u00f6p\u00fck boncu\u011fu uygulan\u0131rsa ve ortam s\u0131cakl\u0131\u011f\u0131 \u00f6nemli \u00f6l\u00e7\u00fcde artarsa, ilk uygulama &quot;en b\u00fcy\u00fck&quot; so\u011fuk halinde olabilir. Is\u0131nd\u0131k\u00e7a h\u00fccrelerin i\u00e7indeki gaz genle\u015fir, ancak birincil hareket k\u00fcrlenme s\u0131ras\u0131nda ger\u00e7ekle\u015fir. Tersine, s\u0131cakta k\u00fcrlenme ve ard\u0131ndan ani bir so\u011fukluk, k\u00f6p\u00fc\u011f\u00fcn beklenenden daha fazla b\u00fcz\u00fclmesine neden olabilir. Bu normal bir fiziksel tepkidir, ancak hatal\u0131 b\u00fcz\u00fclme ile kar\u0131\u015ft\u0131r\u0131labilir.<\/li>\n<\/ul>\n\n\n\n<p><strong>4. Kalitesiz veya Son Kullanma Tarihi Ge\u00e7mi\u015f \u00dcr\u00fcn<\/strong> <\/p>\n\n\n\n<p>K\u00f6p\u00fck dolgu macunlar\u0131n\u0131n kimyasal bile\u015fiminin bir raf \u00f6mr\u00fc vard\u0131r. Zamanla, kutunun i\u00e7indeki \u00f6nceden kar\u0131\u015ft\u0131r\u0131lm\u0131\u015f bile\u015fenler bozulmaya veya \u00f6n reaksiyona girmeye ba\u015flayabilir. Eski veya uygunsuz \u015fekilde saklanan bir kutunun kullan\u0131lmas\u0131, a\u015f\u0131r\u0131 b\u00fcz\u00fclmeye ve d\u00fc\u015f\u00fck performansa yatk\u0131n, karars\u0131z bir h\u00fccre yap\u0131s\u0131na sahip bir k\u00f6p\u00fck olu\u015fumuna neden olabilir.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<p><\/p>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-b6db8b7f\"><h2 class=\"uagb-heading-text\"><strong>Azaltma ve En \u0130yi Uygulamalar: B\u00fcz\u00fclmeyi Nas\u0131l \u00d6nleyebilirsiniz?<\/strong><\/h2><\/div>\n\n\n\n<p>Nedenleri anlamak, do\u011frudan etkili \u00e7\u00f6z\u00fcmlere yol a\u00e7ar. Uygulama ortam\u0131n\u0131 ve tekni\u011fini kontrol ederek, sorunlu PU k\u00f6p\u00fck dolgu macununun b\u00fcz\u00fclmesini neredeyse tamamen ortadan kald\u0131rabilirsiniz.<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Y\u00fczey Haz\u0131rl\u0131\u011f\u0131: Y\u00fczeyin daima temiz, toz ve ya\u011fdan ar\u0131nd\u0131r\u0131lm\u0131\u015f oldu\u011fundan emin olun. K\u00f6p\u00fc\u011f\u00fc uygulamadan \u00f6nce y\u00fczeye hafif\u00e7e su p\u00fcsk\u00fcrt\u00fcn. Bu, h\u0131zl\u0131 ve tam bir k\u00fcrle\u015fme i\u00e7in gerekli nemi sa\u011flar.<\/li>\n\n\n\n<li>S\u0131cakl\u0131k Kontrol\u00fc: K\u00f6p\u00fck kab\u0131n\u0131 kullanmadan \u00f6nce en az 24 saat oda s\u0131cakl\u0131\u011f\u0131nda saklay\u0131n. K\u00f6p\u00fc\u011f\u00fc, ortam ve y\u00fczey s\u0131cakl\u0131klar\u0131 5\u00b0C ile 27\u00b0C (40\u00b0F ile 80\u00b0F) aras\u0131ndayken uygulay\u0131n. Do\u011frudan, s\u0131cak g\u00fcne\u015f \u0131\u015f\u0131\u011f\u0131 alt\u0131nda veya buzlu y\u00fczeylerde uygulamaktan ka\u00e7\u0131n\u0131n.<\/li>\n\n\n\n<li>Uygulama Tekni\u011fi: K\u00f6p\u00fc\u011f\u00fc katmanlar halinde uygulay\u0131n. Derin bo\u015fluklar i\u00e7in, a\u00e7\u0131kl\u0131\u011f\u0131 a\u015fama a\u015fama doldurun. \u0130lk katman\u0131 uygulay\u0131n, tamamen k\u00fcrlenmesini bekleyin (a\u00e7\u0131k kahverengi bir renk alacakt\u0131r) ve ard\u0131ndan \u00fczerine ikinci bir katman uygulay\u0131n. Bu, b\u00fcy\u00fck, k\u00fcrlenmemi\u015f bir \u00e7ekirdek olu\u015fumunu \u00f6nler.<\/li>\n\n\n\n<li>Do\u011fru \u00dcr\u00fcn\u00fc Se\u00e7in: Y\u00fcksek kaliteli, profesyonel s\u0131n\u0131f k\u00f6p\u00fck s\u0131zd\u0131rmazl\u0131k \u00fcr\u00fcnlerine yat\u0131r\u0131m yap\u0131n. Genellikle daha kararl\u0131 \u00fcfleme ajanlar\u0131 i\u00e7eren daha iyi form\u00fcllere sahiptirler ve bu da boyutsal olarak daha kararl\u0131 bir kapal\u0131 h\u00fccreli PU k\u00f6p\u00fck sa\u011flar. Kutunun \u00fczerindeki son kullanma tarihini daima kontrol edin.<\/li>\n\n\n\n<li>\u00dcretici Talimatlar\u0131n\u0131 \u0130zleyin: \u00dcr\u00fcn\u00fcn kimyas\u0131na \u00f6zel olarak haz\u0131rlanm\u0131\u015f olan kutu \u00fczerindeki talimatlara kesinlikle uyun.<\/li>\n<\/ol>\n\n\n\n<p>Poli\u00fcretan End\u00fcstrisi Merkezi (CPI), hem profesyoneller hem de kendin yap\u00e7\u0131lar i\u00e7in paha bi\u00e7ilmez olan poli\u00fcretan \u00fcr\u00fcnlerinin do\u011fru kullan\u0131m\u0131 ve uygulanmas\u0131 konusunda kapsaml\u0131 k\u0131lavuzlar sunmaktad\u0131r. <\/p>\n\n\n\n<p><\/p>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-fcab14f3\"><h2 class=\"uagb-heading-text\"><strong>\u00c7\u00f6z\u00fcm<\/strong><\/h2><\/div>\n\n\n\n<p>PU k\u00f6p\u00fck dolgu macununun kuruduktan sonra b\u00fcz\u00fclmesi endi\u015fe verici olabilir, ancak bu genellikle malzemenin davran\u0131\u015f\u0131n\u0131n \u00f6ng\u00f6r\u00fclebilir ve y\u00f6netilebilir bir y\u00f6n\u00fcd\u00fcr. Temel neden, \u00e7o\u011funlukla kapal\u0131 h\u00fccreli PU k\u00f6p\u00fck yap\u0131s\u0131 i\u00e7indeki gaz de\u011fi\u015fim s\u00fcre\u00e7lerinde yatmakta olup, bu s\u00fcrece eksik k\u00fcrlenme ve a\u015f\u0131r\u0131 s\u0131cakl\u0131klar gibi fakt\u00f6rler de eklenmektedir.<\/p>\n\n\n\n<p>K\u00f6p\u00fck dengeye ula\u015ft\u0131\u011f\u0131nda hafif bir b\u00fcz\u00fclme (genellikle 1-5%) normal kabul edilirken, \u00f6nemli bir b\u00fcz\u00fclme uygulama hatas\u0131na, \u00e7evresel fakt\u00f6rlere veya kalitesiz bir \u00fcr\u00fcne i\u015faret eden bir uyar\u0131 i\u015faretidir.<\/p>\n\n\n\n<p>PU k\u00f6p\u00fc\u011f\u00fcn kimyasal yap\u0131s\u0131na sayg\u0131 g\u00f6stererek ve en iyi uygulamalara ba\u011fl\u0131 kalarak (y\u00fczeyleri nemlendirme, s\u0131cakl\u0131\u011f\u0131 kontrol etme ve katmanlar halinde uygulama) k\u00f6p\u00fc\u011f\u00fcn tamamen k\u00fcrlenmesini ve b\u00fcz\u00fclmeyi en aza indiren, yal\u0131t\u0131m ve bo\u015fluk doldurma g\u00f6revlerini y\u0131llarca etkili bir \u015fekilde yerine getiren sa\u011flam ve uzun \u00f6m\u00fcrl\u00fc bir s\u0131zd\u0131rmazl\u0131k olu\u015fturmas\u0131n\u0131 sa\u011flayabilirsiniz.<\/p>\n\n\n\t\t\t<div class=\"srfm-form-container srfm-form-container-2475 srfm-bg-color\">\n\t\t\t<style>\n\t\t\t\t\/* Need to check and remove the input variables related to the Style Tab. *\/\n\t\t\t\t.srfm-form-container-2475 {\n\t\t\t\t\t\/* New test variables *\/\n\t\t\t\t\t--srfm-color-scheme-primary: var(--ast-global-color-0);\n\t\t\t\t\t--srfm-color-scheme-text-on-primary: #FFFFFF;\n\t\t\t\t\t--srfm-color-scheme-text: var(--ast-global-color-2);\n\t\t\t\t\t--srfm-quill-editor-color: var(--ast-global-color-0);\n\n\t\t\t\t\t--srfm-color-input-label: var(--ast-global-color-2);\n\t\t\t\t\t--srfm-color-input-description: hsl( from var(--ast-global-color-2) h s l \/ 0.65 );\n\t\t\t\t\t--srfm-color-input-placeholder: hsl( from var(--ast-global-color-2) h s l \/ 0.5 );\n\t\t\t\t\t--srfm-color-input-text: var(--ast-global-color-2);\n\t\t\t\t\t--srfm-color-input-prefix: hsl( from var(--ast-global-color-2) h s l \/ 0.65 );\n\t\t\t\t\t--srfm-color-input-background: hsl( from var(--ast-global-color-2) h s l \/ 0.02 );\n\t\t\t\t\t--srfm-color-input-background-hover: hsl( from var(--ast-global-color-2) h s l \/ 0.05 );\n\t\t\t\t\t--srfm-color-input-background-disabled: hsl( from var(--ast-global-color-2) h s l \/ 0.07 );\n\t\t\t\t\t--srfm-color-input-border: hsl( from var(--ast-global-color-2) h s l \/ 0.25 );\n\t\t\t\t\t--srfm-color-input-border-disabled: hsl( from var(--ast-global-color-2) h s l \/ 0.15 );\n\t\t\t\t\t--srfm-color-multi-choice-svg: hsl( from var(--ast-global-color-2) h s l \/ 0.7 );\n\t\t\t\t\t--srfm-color-input-border-hover: hsl( from var(--ast-global-color-0) h s l \/ 0.65 );\n\t\t\t\t\t--srfm-color-input-border-focus-glow: hsl( from var(--ast-global-color-0) h s l \/ 0.15 );\n\t\t\t\t\t--srfm-color-input-selected: hsl( from var(--ast-global-color-0) h s l \/ 0.1 );\n\t\t\t\t\t--srfm-btn-color-hover: hsl( from var(--ast-global-color-0) h s l \/ 0.9 );\n\t\t\t\t\t--srfm-btn-color-disabled: hsl( from var(--ast-global-color-0) h s l \/ 0.25 );\n\n\t\t\t\t\t\/* Dropdown Variables *\/\n\t\t\t\t\t--srfm-dropdown-input-background-hover: hsl( from var(--ast-global-color-2) h s l \/ 0.05 );\n\t\t\t\t\t--srfm-dropdown-option-background-hover: hsl( from var(--ast-global-color-2) h s l \/ 0.10 );\n\t\t\t\t\t--srfm-dropdown-option-background-selected: hsl( from var(--ast-global-color-2) h s l \/ 0.05 );\n\t\t\t\t\t--srfm-dropdown-option-selected-icon: hsl( from var(--ast-global-color-2) h s l \/ 0.65 );\n\t\t\t\t\t--srfm-dropdown-option-text-color: hsl( from var(--ast-global-color-2) h s l \/ 0.80 );\n\t\t\t\t\t--srfm-dropdown-option-selected-text: var(--ast-global-color-2);\n\t\t\t\t\t--srfm-dropdown-badge-background: hsl( from var(--ast-global-color-2) h s l \/ 0.05 );\n\t\t\t\t\t--srfm-dropdown-badge-background-hover: hsl( from var(--ast-global-color-2) h s l \/ 0.10 );\n\t\t\t\t\t--srfm-dropdown-menu-border-color: hsl( from var(--ast-global-color-2) h s l \/ 0.10 );\n\t\t\t\t\t--srfm-dropdown-placeholder-color: hsl( from var(--ast-global-color-2) h s l \/ 0.50 );\n\t\t\t\t\t--srfm-dropdown-icon-color: hsl( from var(--ast-global-color-2) h s l \/ 0.65 );\n\t\t\t\t\t--srfm-dropdown-icon-disabled: hsl( from var(--ast-global-color-2) h s l \/ 0.25 );\n\n\t\t\t\t\t\/* Background Control Variables *\/\n\t\t\t\t\t--srfm-instant-form-padding-top: 32px;--srfm-instant-form-padding-right: 32px;--srfm-instant-form-padding-bottom: 32px;--srfm-instant-form-padding-left: 32px;--srfm-instant-form-border-radius-top: 12px;--srfm-instant-form-border-radius-right: 12px;--srfm-instant-form-border-radius-bottom: 12px;--srfm-instant-form-border-radius-left: 12px;--srfm-form-padding-top: 0px;--srfm-form-padding-right: 0px;--srfm-form-padding-bottom: 0px;--srfm-form-padding-left: 0px;--srfm-form-border-radius-top: 0px;--srfm-form-border-radius-right: 0px;--srfm-form-border-radius-bottom: 0px;--srfm-form-border-radius-left: 0px;--srfm-bg-color: #ffffff;--srfm-bg-overlay-opacity: 1;\t\t\t\t\t--srfm-row-gap-between-blocks: 18px;--srfm-address-label-font-size: 16px;--srfm-address-label-line-height: 24px;--srfm-address-description-font-size: 14px;--srfm-address-description-line-height: 20px;--srfm-col-gap-between-fields: 16px;--srfm-row-gap-between-fields: 16px;--srfm-gap-below-address-label: 14px;--srfm-dropdown-font-size: 14px;--srfm-dropdown-gap-between-input-menu: 4px;--srfm-dropdown-badge-padding: 2px 6px;--srfm-dropdown-multiselect-font-size: 12px;--srfm-dropdown-multiselect-line-height: 16px;--srfm-dropdown-padding-right: 12px;--srfm-dropdown-padding-right-icon: calc( var( --srfm-dropdown-padding-right ) + 20px );--srfm-dropdown-multiselect-padding: 8px var( --srfm-dropdown-padding-right-icon ) 8px 8px;--srfm-input-height: 44px;--srfm-input-field-padding: 10px 12px;--srfm-input-field-font-size: 16px;--srfm-input-field-line-height: 24px;--srfm-input-field-margin-top: 6px;--srfm-input-field-margin-bottom: 6px;--srfm-checkbox-label-font-size: 16px;--srfm-checkbox-label-line-height: 24px;--srfm-checkbox-description-font-size: 14px;--srfm-checkbox-description-line-height: 20px;--srfm-check-ctn-width: 16px;--srfm-check-ctn-height: 16px;--srfm-check-svg-size: 10px;--srfm-checkbox-margin-top-frontend: 4px;--srfm-checkbox-margin-top-editor: 6px;--srfm-check-gap: 8px;--srfm-checkbox-description-margin-left: 24px;--srfm-flag-section-padding: 10px 0 10px 12px;--srfm-gap-between-icon-text: 8px;--srfm-label-font-size: 16px;--srfm-label-line-height: 24px;--srfm-description-font-size: 14px;--srfm-description-line-height: 20px;--srfm-btn-padding: 10px 14px;--srfm-btn-font-size: 16px;--srfm-btn-line-height: 24px;--srfm-multi-choice-horizontal-padding: 20px;--srfm-multi-choice-vertical-padding: 20px;--srfm-multi-choice-internal-option-gap: 8px;--srfm-multi-choice-vertical-svg-size: 40px;--srfm-multi-choice-horizontal-image-size: 24px;--srfm-multi-choice-vertical-image-size: 120px;--srfm-multi-choice-outer-padding: 2px;\t\t\t\t}\n\t\t\t<\/style>\n\t\t\t\t\t\t\t<form method=\"post\" enctype=\"multipart\/form-data\" id=\"srfm-form-2475\" class=\"srfm-form\"\n\t\t\t\tform-id=\"2475\" after-submission=\"hide form\" message-type=\"same page\" success-url=\"\" ajaxurl=\"https:\/\/donyanchem.com\/wp-admin\/admin-ajax.php\" data-submit-token=\"f0083a32268aae94307509edff076a432dcf42db7f49a3c3dd1a14d277b8a66a\" action=\"\"\n\t\t\t\t>\n\t\t\t\t\n\t\t\t\t<input type=\"hidden\" value=\"2475\" name=\"form-id\">\n\t\t\t\t<input type=\"hidden\" value=\"\" name=\"srfm-sender-email-field\" id=\"srfm-sender-email\">\n\t\t\t\t<input type=\"hidden\" value=\"\" id=\"srfm-page-break\">\n\t\t\t\t\t\t\t\t\t<input type=\"hidden\" value=\"\" name=\"srfm-honeypot-field\">\n\t\t\t\t\t\t\t<p id=\"srfm-error-message\" class=\"srfm-common-error-message srfm-error-message srfm-head-error\" hidden>\t\t<span class=\"srfm-icon\" aria-hidden=\"true\">\n\t\t\t<svg xmlns='http:\/\/www.w3.org\/2000\/svg' width='20' height='20' fill='none'><path d='M9.99935 18.3327C14.6017 18.3327 18.3327 14.6017 18.3327 9.99935C18.3327 5.39698 14.6017 1.66602 9.99935 1.66602C5.39698 1.66602 1.66602 5.39698 1.66602 9.99935C1.66602 14.6017 5.39698 18.3327 9.99935 18.3327Z' stroke='currentColor' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round' \/><path d='M10 6.66602V9.99935' stroke='currentColor' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round' \/><path d='M10 13.334H10.0083' stroke='currentColor' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round' \/><\/svg>\t\t<\/span>\n\t\t<span class=\"srfm-error-content\">Formunuz g\u00f6nderilirken bir hata olu\u015ftu. L\u00fctfen tekrar deneyin.<\/span><\/p>\n\t\t\t\t\t<div data-block-id=\"60d87b1b\" class=\"srfm-block-single srfm-block srfm-input-block srf-input-60d87b1b-block  srfm-block-width-100 srfm-slug-enter-your-full-name 2397\" >\n\t\t\t\t\t\t\t\t\t\t<div class=\"srfm-block-wrap\">\n\t\t\t\t<input class=\"srfm-input-common srfm-input-input\" type=\"text\" name=\"srfm-input-60d87b1b-lbl-RW50ZXIgeW91ciBmdWxsIG5hbWU-enter-your-full-name\" id=\"srfm-input-60d87b1b-lbl-RW50ZXIgeW91ciBmdWxsIG5hbWU\"\n\t\t\t\t\taria-describedby='srfm-error-60d87b1b'\t\t\t\t\tdata-required=\"false\" aria-required=\"false\" data-unique=\"false\" maxlength=\"100\" value=\"\"  placeholder=\"Tam ad\u0131n\u0131z\u0131 girin\"  data-srfm-mask=\"none\"   \/>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"srfm-error-wrap\">\n\t\t\t\t\t\t\t\t\t\t<div class=\"srfm-error-message\" data-srfm-id=\"srfm-error-60d87b1b\" data-error-msg=\"This field is required.\" data-unique-msg=\"Value needs to be unique.\">\n\t\t\t\t\t\tBu alan zorunludur.\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\n\n\t\t\t<div data-block-id=\"fbc8c2f3\" class=\"srfm-block-single srfm-block srfm-input-block srf-input-fbc8c2f3-block  srfm-block-width-100 srfm-slug-phone-number 2397\" >\n\t\t\t\t\t\t\t\t\t\t<div class=\"srfm-block-wrap\">\n\t\t\t\t<input class=\"srfm-input-common srfm-input-input\" type=\"text\" name=\"srfm-input-fbc8c2f3-lbl-UGhvbmUgbnVtYmVy-phone-number\" id=\"srfm-input-fbc8c2f3-lbl-UGhvbmUgbnVtYmVy\"\n\t\t\t\t\taria-describedby='srfm-error-fbc8c2f3'\t\t\t\t\tdata-required=\"false\" aria-required=\"false\" data-unique=\"false\" maxlength=\"100\" value=\"\"  placeholder=\"Telefon numaras\u0131\"  data-srfm-mask=\"none\"   \/>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"srfm-error-wrap\">\n\t\t\t\t\t\t\t\t\t\t<div class=\"srfm-error-message\" data-srfm-id=\"srfm-error-fbc8c2f3\" data-error-msg=\"This field is required.\" data-unique-msg=\"Value needs to be unique.\">\n\t\t\t\t\t\tBu alan zorunludur.\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\n\n\t\t\t<div data-block-id=\"f9fe6c7b\" class=\"srfm-block-single srfm-block srfm-email-block srf-email-f9fe6c7b-block  srfm-block-width-100 srfm-slug-your-email 2397 srfm-email-block-wrap\">\n\t\t\t\t<div class=\"srfm-email-block srf-email-f9fe6c7b-block\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"srfm-block-wrap\">\n\t\t\t\t\t\t<input class=\"srfm-input-common srfm-input-email\" type=\"email\" name=\"srfm-email-f9fe6c7b-lbl-WW91ciBlbWFpbA-your-email\" id=\"srfm-email-f9fe6c7b-lbl-WW91ciBlbWFpbA\"\n\t\t\t\t\t\taria-describedby='srfm-error-f9fe6c7b'\t\t\t\t\t\tdata-required=\"false\" aria-required=\"false\" data-unique=\"false\" value=\"\"  placeholder=\"E-postan\u0131z\"   \/>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t<div class=\"srfm-error-wrap\">\n\t\t\t\t\t\t\t\t\t\t\t<div class=\"srfm-error-message\" data-srfm-id=\"srfm-error-f9fe6c7b\" data-error-msg=\"This field is required.\" data-unique-msg=\"Value needs to be unique.\">\n\t\t\t\t\t\tBu alan zorunludur.\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\n\n\t\t\t<div data-block-id=\"2ae8e708\" class=\"srfm-block-single srfm-block srfm-input-block srf-input-2ae8e708-block  srfm-block-width-100 srfm-slug-service-description 2397\" >\n\t\t\t\t\t\t\t\t\t\t<div class=\"srfm-block-wrap\">\n\t\t\t\t<input class=\"srfm-input-common srfm-input-input\" type=\"text\" name=\"srfm-input-2ae8e708-lbl-U2VydmljZSBkZXNjcmlwdGlvbg-service-description\" id=\"srfm-input-2ae8e708-lbl-U2VydmljZSBkZXNjcmlwdGlvbg\"\n\t\t\t\t\taria-describedby='srfm-error-2ae8e708'\t\t\t\t\tdata-required=\"false\" aria-required=\"false\" data-unique=\"false\" maxlength=\"100\" value=\"\"  placeholder=\"Hizmet a\u00e7\u0131klamas\u0131\"  data-srfm-mask=\"none\"   \/>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"srfm-error-wrap\">\n\t\t\t\t\t\t\t\t\t\t<div class=\"srfm-error-message\" data-srfm-id=\"srfm-error-2ae8e708\" data-error-msg=\"This field is required.\" data-unique-msg=\"Value needs to be unique.\">\n\t\t\t\t\t\tBu alan zorunludur.\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\n\n\t\t<div data-block-id=\"b79b54a0\" class=\"srfm-block-single srfm-block srfm-textarea-block srf-textarea-b79b54a0-block  srfm-block-width-100 2397\">\n\t\t\t\t\t\t\t\t\t<div class=\"srfm-block-wrap\">\n\t\t\t\t<textarea\n\t\t\t\t\tclass=\"srfm-input-common srfm-input-textarea\"\n\t\t\t\t\tname=\"srfm-textarea-b79b54a0-lbl-TWVzc2FnZQ-message\"\n\t\t\t\t\tid=\"srfm-textarea-b79b54a0-lbl-TWVzc2FnZQ-6930\"\n\t\t\t\t\taria-describedby='srfm-error-b79b54a0'\t\t\t\t\tdata-required=\"false\" aria-required=\"false\"  rows=\"4\"   placeholder=\"Mesaj\" \t\t\t\t\t\t\t\t\t\t\t\t\t\t\t><\/textarea>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t<div class=\"srfm-error-wrap\">\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/div>\n\n\t\t\t\t\t\t\t\n\t\t\t\t\t\n\t\t\t\t\t<div class=\"srfm-submit-container\" style=\"\">\n\t\t\t\t\t\t<div style=\"width: ; text-align: left\" class=\"wp-block-button\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<button style=\"\" id=\"srfm-submit-btn\" class=\"srfm-btn-frontend srfm-button srfm-submit-button\"\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t>\n\t\t\t\t\t\t\t\t<div class=\"srfm-submit-wrap\">\n\t\t\t\t\t\t\t\t\t\u00dcCRETS\u0130Z TEKL\u0130F ALIN\t\t\t\t\t\t\t\t<div class=\"srfm-loader\"><\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<\/button>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<p id=\"srfm-error-message\" class=\"srfm-common-error-message srfm-error-message srfm-footer-error\" hidden>\t\t<span class=\"srfm-icon\" aria-hidden=\"true\">\n\t\t\t<svg xmlns='http:\/\/www.w3.org\/2000\/svg' width='20' height='20' fill='none'><path d='M9.99935 18.3327C14.6017 18.3327 18.3327 14.6017 18.3327 9.99935C18.3327 5.39698 14.6017 1.66602 9.99935 1.66602C5.39698 1.66602 1.66602 5.39698 1.66602 9.99935C1.66602 14.6017 5.39698 18.3327 9.99935 18.3327Z' stroke='currentColor' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round' \/><path d='M10 6.66602V9.99935' stroke='currentColor' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round' \/><path d='M10 13.334H10.0083' stroke='currentColor' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round' \/><\/svg>\t\t<\/span>\n\t\t<span class=\"srfm-error-content\">Formunuz g\u00f6nderilirken bir hata olu\u015ftu. L\u00fctfen tekrar deneyin.<\/span><\/p>\n\t\t\t\t\t<input type=\"hidden\" name=\"trp-form-language\" value=\"tr\"\/><\/form>\n\t\t\t<div class=\"srfm-single-form srfm-success-box in-page\">\n\t\t\t\t<div aria-live=\"polite\" aria-atomic=\"true\" role=\"alert\" id=\"srfm-success-message-page-2475\" class=\"srfm-success-box-description\"><\/div>\n\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\n\n\n\n<p><\/p>","protected":false},"excerpt":{"rendered":"<p>PU (Polyurethane) foam sealant is a staple in construction and DIY projects, renowned for its exceptional sealing, insulating, and gap-filling capabilities. However, users are sometimes alarmed to observe a noticeable shrinkage or pulling away from surfaces after the foam has fully cured. This phenomenon can compromise the seal, reduce insulation value, and lead to drafts 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