Glasplies Ltd

This is an effective sealer for concrete ponds or can be used as a primer prior to coating a concrete  floor with fibreglass . G4 is a moisture cured, one component polyurethane product which forms a non-porous, tough, durable but flexible seal on concrete. This prevents lime leaching into your pond from the concrete and stops water leaking out.

You just paint it straight onto the concrete, no primer needed. G4 can also be used to coat flagstones, waterfalls, statues and other concrete products to make them safe for the pond.