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A one component plastic varnish. Use 2-3 coats of G4 Sealer to seal a porous master such as dry clay or dry plaster of Paris prior to pouring hot Gelflex to make a mould. Also use G4 to seal damp walls, ponds, pools or dusty concrete floors etc.

*This product is hazardous/flammable and must be sent by a road carrier, please see our delivery charges page for shipping information