For best results clean all surfaces to be free of grease, algae, etc. Place Gold label Underwater Sealer directly onto the surface you wish to bond/seal. Silver label Silicone Sealer is completely safe for the fish or any other pond life.
Silver label Silicone Sealer for Full cure needs 24 hours, initial tack 2-3 hours.
Silver label Silicone Sealer is black and supplied in a tube ready for application using a mastic gun
Silver Label Silicone Sealant, which cures rapidly on exposure to moisture vapour to form a resilient elastic silicone rubber.