Market leading concrete sealant. G4 Pond Sealant is durable, deep bonding plastic coating for concrete, brick, and porous stone (not suitable directly onto concrete blocks, these need to be cement rendered first). G4 uses the moisture in the air and substrate to cure or harden so it can be applied to slightly damp substrates. G4 can be applied in poor weather conditions, high humidity and at temperatures down to 0°C. Consumption of G4: (Uncoloured). 3 coats = 550g/m² (for all 3 coats). Specifications Finish: Black Weight: 2.5kg