Selleys Glass Silicone is an acetic acid curing 100% silicone, which has excellent adhesion to glass and has been especially formulated for glazing and aquarium construction.| The acetic curing formulation results in superior adhesion on glass and glazing surfaces.| Superior 100% silicone formulation forms a durable seal.| UV and weather resistant.| Temperature resistance - approximately -60°C +150°C.| Superior flexibility +/- 25% movement capability.| 25 year guarantee* against cracking, crumbling or peeling away.| *When used as directed for private use and within 12 months of purchase, this product is guaranteed against crumbling, cracking or peeling away.