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B&Q£16.99Visit shop B&Q - Wurth B3 Gun Grade Expanding Foam 750Ml Pu Insulation Filler Window Door Mountin
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The Würth B3 Gun Grade Expanding Foam is designed for professional contractors and serious DIY enthusiasts requiring a reliable sealing and insulation solution for window and door installations. It provides an excellent heat and sound insulation barrier with a stable, fine-celled structure, though users should note it does not adhere to PE, PP, PTFE, or silicone surfaces.
| Brand | Würth |
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No, this foam is not suitable for use on PE, PP, PTFE, or silicone surfaces as it will not achieve a proper bond.
Yes, it provides superior heat and sound insulation compared to mineral wool or fibreglass.
This foam is designed to be used with specific PURLOGIC foam guns.
Yes, it is resistant to aging, various solvents, and chemicals, ensuring a long-lasting seal.
Yes, ensure the surface is clean. For porous substrates, applying a primer will help ensure optimal adhesion.
Ensure the substrate is free of dust and grease; consider using a primer for highly porous materials.
Always flush the foam gun with an appropriate cleaning agent immediately after detaching the canister.
Check that the ambient temperature is within the recommended range and do not overfill the gap.
For optimal performance, ensure that all application surfaces are clean, free of dust, and devoid of grease or oil. If you are working with highly porous substrates, applying a primer prior to foam application will improve bond strength. The foam is designed for use with specific PURLOGIC foam guns, which allow for the fine flow control necessary for clean joints. After application, allow the product sufficient time to cure in accordance with ambient humidity and temperature. Always store the canister in an upright position and clean the applicator gun with a suitable foam cleaner immediately after use to prevent curing inside the nozzle.
