Пенополиуретановый клей – новый артефакт для герметизации и утепления дверей и окон.

Пенополиуретановый клей – новый артефакт для герметизации и утепления дверей и окон.

Polyurethane foam glue is a one-component, moisture-curing adhesive foam. Stored in pressurized aerosol cans, it is dispensed as a liquid that rapidly expands (to 30–50 times its original volume) upon contact with air and eventually cures into a rigid, closed-cell foam. Its unique properties effectively address the core pain points of door and window sealing:

• Superior Adhesion: It bonds tightly to common door and window materials—wood, aluminum, PVC, and glass—forming a long-lasting seal that resists peeling or cracking.
• Integrated Insulation: The closed-cell structure blocks heat transfer (reducing energy costs by up to 20% according to data from the U.S. Department of Energy) and sound transmission, keeping indoor temperatures more stable and the environment quieter.
• Flexible Gap-Filling: It can expand to fill irregular gaps (ranging from 1mm to 50mm in width) around window frames, sashes, and hinges—areas where traditional materials often fail to seal completely.

For example, Dongyuan’s Polyurethane Foam Sealant is specially developed for door and window sealing scenarios. It adopts a low-VOC (volatile organic compounds) formula, complies with relevant domestic green building standards, and after curing, the foam has a uniform density and strong anti-shrinkage performance, which can maintain the sealing integrity of door and window gaps for a long time. (Source: Dongyuan Polyurethane Foam Sealant Product Page).

Compared with traditional sealing solutions, polyurethane foam glue offers unparalleled advantages for both DIY enthusiasts and professional installers:

• Energy Saving: By sealing air leaks around doors and windows, PU foam insulation reduces the load on heating and cooling systems. Data from the Spray Foam Coalition shows that well-sealed doors and windows can save an average household 100–300 in annual energy costs (Source: Spray Foam Coalition Insulation Data).
• Weather Resistance and Durability: The cured foam is waterproof and UV-stable, capable of withstanding rain, snow, and sun exposure. It prevents water infiltration that can cause wood frame rot or indoor mold growth.
• Efficiency and Time-Saving: It can be easily applied via a nozzle, with initial curing taking 20–60 minutes (full curing in 24 hours), and requires minimal cleanup. Unlike silicone sealants, it does not shrink or crack over time, reducing the need for re-sealing.
• Noise Reduction: The dense foam absorbs sound waves, reducing outdoor noise (such as traffic and neighborhood noise) by 15–25 decibels, making it particularly suitable for homes near busy streets.

Not all PU foam glues are the same. The following characteristics should be considered based on the needs of doors and windows to ensure the selected product aligns with your door and window sealing goals:

• Indoor vs. Outdoor: Products labeled “outdoor-grade” have stronger UV resistance and water resistance, making them suitable for sealing outdoor windows and doors; indoor foam glue usually adopts a low-VOC formula. For example, Dongyuan’s products designed for indoor scenarios have formaldehyde emissions that comply with the GB 18583-2008 standard, which is more beneficial to indoor air quality.
• Expansion Rate: Low-expansion foam (suitable for small gaps below 10mm) is suitable for window frames such as PVC windows that are prone to deformation due to expansion stress; high-expansion foam (e.g., Dongyuan’s outdoor model with an expansion multiple of 35–40 times) is more suitable for filling large gaps of 10–50mm in wooden doors and aluminum alloy doors.
• Curing Time: Fast-curing foam (non-tacky in 20 minutes) is suitable for projects with tight schedules; slow-curing foam (non-tacky in 60 minutes) allows more time for shape adjustment, making it suitable for precise sealing of complex gaps.

For those looking to upgrade door and window sealing and improve home insulation, polyurethane foam glue is an indispensable tool. Its comprehensive capabilities in gap filling, energy saving, and weather resistance far exceed those of traditional materials. In particular, products like Dongyuan’s, which are developed for specific needs, are more suitable for domestic door and window materials and usage scenarios. By avoiding common operational mistakes and selecting the right product, you can easily transform drafty and noisy doors and windows into energy-efficient, comfortable, and quiet barriers—with minimal time and effort.

1. Dongyuan Chem. (n.d.). Polyurethane Foam Sealant. https://www.dongyuan-chem.com/product/polyurethane-foam-sealant.html
2. Spray Foam Coalition. (2023). Spray Foam Insulation and Energy Efficiency. https://sprayfoam.org/energy-efficiency/
3. Occupational Safety and Health Administration (OSHA). (2022). Safety Standards for Aerosol Products. https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.106
4. Great Stuff. (n.d.). Pro Series Gap Filler Foam. https://www.greatstuff.dow.com/products/pro/gaps-cracks/
5. Sika USA. (n.d.). SikaFlex 1-Component Polyurethane Foam Sealant. https://www.sikausa.com/en-us/products/construction/sealants-and-adhesives/foam-sealants/sikaflex-1-component-polyurethane-foam-sealant.html