300ml White Leak Stop Spray & Seal Fix Waterproof Sealant Mastic Gutter Roof New
Leak Stop Spray N Seal Pipe Gutter Roof Mastic White Waterproof Sealant UK. Instant Leak Stop Spray N Seal Pipe Gutter Roof Mastic Black Waterproof Sealant. Mixing the ingredients is paramount to stop splatter and the clogging of nozzles!