Prymax Pond Sealer
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, hardwearing glosscoat. Colour: Transluscent Amber.
Coverage: For all 3 coats allow 500g per square metre.