Everbuild 450 Builders Silicone Sealant - Brown

No, the Everbuild Everflex 450 Builders Silicone Sealant is formulated to adhere to a wide range of both porous and non-porous surfaces without the need for priming.

It adheres well to PVCu, wood, plastics, aluminium, glass, concrete, masonry, and painted surfaces.

Yes, it is ideal for weather sealing applications externally, providing a waterproof and flexible seal.

It cures quickly to provide a permanently flexible seal. The exact curing time depends on bead size, temperature, and humidity, but it is faster than many conventional low-modulus sealants.

This sealant is not designed to be painted over. It is typically used for visible seals where a clean finish is required.

Oxime cure silicones (like this one) generally have better adhesion to more surfaces without primer and a more neutral odour. Acetoxy cure silicones release acetic acid during curing, which can be corrosive to some metals and may have a stronger smell.

Store the tube in a cool, dry place away from direct sunlight, with the nozzle remaining on or sealed to prevent premature curing.

Ensure the surface is clean, dry, and free from dust, grease, or contaminants. Re-clean the surface and reapply.

Ensure the nozzle is cut appropriately and use a good quality sealant gun. If the product has been stored for a very long time, performance may degrade.

Tool the bead within 5-10 minutes of application using a wet tool or finger. Re-tooling after the initial skin has formed may result in a messy finish.

Ensure adequate ventilation. Curing time can be affected by temperature and humidity. High humidity and low temperatures will slow down the curing process.