Firestone Water Block Sealant This water block sealant from Firestone is designed to be used in flat roofing projects and works best when used alongside other Firestone products. It creates a seal when used under compression for a long lasting finish. Each 300ml cartridge contains a coverage of 3 linear metres.
This Universal Sealant is a black, waterproof, silicone suitable for creating a long-lasting seal on chases above wall trims. Each cartridge contain approximately 300ml and 3 linear metres. To create a seal on large existing chases, only a small bead of sealant is needed.