To put your bathroom back into use quickly, the superior mould resistant formulation of water proof UniBond Speed Seal provides a hygienic barrier from water by creating a permanently flexible seal, allowing water contact after only one hour. It's our fastest sealant yet. Hygienic seal is suitable for showers, bathrooms, kitchens, baths, toilets, worktops, tiled areas, sinks and basins. Preparation: To gain a perfect seal, you must first ensure the area being sealed is clean, dry and free of old sealant, grease and dirt. UniBond Silicone Sealant Remover Gel will aid the removal of old sealant. Furthermore, to make sure that surfaces are as clean as possible, use a cloth damped with white spirit to remove remaining grease and dirt. Using a Sealant Cartridge and Gun: Cut the tip off the cartridge above the screw thread.