𝗣𝗿𝘆𝗺𝗮𝘅 is an easy to apply liquid polyurethane that forms a hard but flexible plastic seal on almost any porous surface. Treat your rendered pond to a coat of armour; sealing out moisture and lime, consolidating fragile surfaces and leaving a tough, hard wearing gloss coat. 𝗧𝗘𝗖𝗛𝗡𝗜𝗖𝗔𝗟 𝗜𝗡𝗙𝗢𝗥𝗠𝗔𝗧𝗜𝗢𝗡: Prymax Pond and Damp sealer is designed to be applied in 3 thin coats with the second and third coats being applied when the previous coat is finger tacky like strong Sellotape or touch dry, for colours, paint two coats of clear followed by two coats of colour all applied within three hours of each other, if more than three hours has elapsed then it must be left for 24 hours and sanded down before applying further coats.