Gold Label Pond Sealer is a strong underwater sealant that allows you to repair rips and holes in pond liners. It is non-toxic, solvent and is isocyanate-free so there is no need to drain your pond when making the repair. Perfect for use with butyl pond liners, this pond liner sealant will bond to a variety of surfaces.This heavy-duty Hutton Aquatic Products pond sealer is perfect for sticking together a wide variety of materials including various forms of butyl rubber, vinyl, plastic, ceramic, concrete, wood and glass. Specially designed to adhere to pond liners or patches, Gold Label Pond Sealer is also ideal for sealing bottom drains, tank connectors, pipe inlets and surface skimmers.There is no difference in performance between freshwater and saltwater. This aquarium sealer can also be used safely on coral or living rock as it is an inert, non-toxic product. For best results on aquarium repairs or construction, we suggest using Silver Label sealant.For best results ensure the surface is clean and free of grease, algae etc. Dispense the pond sealer using a sealant gun directly onto the surface you wish to bond or seal. For bonding where there is movement (expansion and contraction) of different substrates, leave a minimum 2mm thickness of bead between surfaces. As Gold Label Pond Sealer is fish safe there is no need to remove fish for curing. The initial tack will take 24 hours and the sealant will continuously harden for up to 7 days.The most common reason to use a sealant to stick to a pond liner is that you are trying to use it as glue. It's important to note that if you press down onto the surfaces to be stuck, the area cannot cure. Always apply a bead of approx 5 mm and gently attach the object of the liner patch to leave a bead of approx 2-5 mm.If repair work has taken place on the side of the pond, it can be refilled immediately. However, if the repair seal is at the bottom of the pond, wait for 24 hours to refill.