

G4 is a moisture cured polyurethane which forms a non-porous seal on concrete, brick and porous stone. G4 uses the moisture in the air and substrate to cure and harden.
For more information on G4 Pond Sealant and to purchase products, try these links:
Normally three coats of G4 Pond Paint Sealant Clear is sufficient to build a continuous surface film but on very porous substrates a 4th coat may be required. When using coloured G4 Paint/Sealant the first two coats must be G4 clear.
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