Envirograf High Temperature Silicone (Black or Clear)

Envirograf High-Performance Silicone Sealant is an odourless, ready-to-use, flexible, halogen-free sealant that cures to a rubber-like consistency. It reacts with atmospheric moisture to form a durable, long-lasting, flexible seal.

Ideal for sealing joints between a wide range of building materials, it provides a water-tight and gas-tight seal on steel, brick, blockwork, concrete, ceilings, walls, and partitions. Suitable for alkaline substrates such as concrete, mortar, and fibre cement, it can seal gaps up to 50mm wide.

Safe for use on log stoves in areas away from direct flames, it is supplied in 310ml tubes.

Tested to BS476 Parts 20, 21 & 22 (1987) for sealing penetrations and expansion joints, it achieves integrity ratings of up to 240 minutes. Tack-free time is 120 minutes, with skin-forming in 15–30 minutes at 23°C and 50% relative humidity.