ABL (STEVENS) Resin & Glass





G4 Pond Seal is a “moisture cured” one-component polyurethane, which forms a non-porous, tough, durable but flexible seal.

Seals porous substrates such as concrete, brick and porous stone.

G4 will not seal, lightweight block, these need to be cement rendered before application of G4.

In general it is advised that all substrates are rendered below the water line.

G4 can be used at low temperatures, down to 0º C and in areas of relative high humidity.

G4 cannot be used on bitumen but will not damage butyl rubber liners.

G4 is easy and quick to use, simply brush on the recommended coats in a day.



Ensure cement render is clean, dry and porous – highly trowel led ridged surfaces are not advised.

New render should be allowed to harden for 21-28 days depending on conditions.

Reinforcing fibres in the cement render must be burnt or sanded off before coating.

Repair cracks and damaged areas.

Apply first coat by brush, avoid thick coats and allow to become fingerprint dry, or dry enough to walk upon carefully, approx. 60-90 minutes depending on humidity.

Apply subsequent coats following the above instructions.

Do not allow longer than 4 hours to elapse between each coat, normally 3 coats of G4 standard are sufficient but on very porous or rough surfaces a 4th coat may be required.

Rain will affect uncured G4 so make provision for covering if rain is suspected.

Allow to harden for 72 hours before washing down with clean water.

Then follow aquarist instructions.




Varies slightly depending on porosity. On normal porous cement renders:

G4 Standard  4 coats = 840 g/sq.metres (for 4 coats).




Clean brushes and tools with cellulose thinners or acetone; alternatively wash out in hot water and detergent and dry.



Please contact us for a general guide to coating concrete pools with glass fibre.   






These notes are given in good faith for general guidance purposes only and since actual operating conditions, methods and application techniques are beyond our control, we cannot accept liability for any losses however they may occur.


Unit 4, Millbuck Way, Springvale Industrial estate, Sandbach, Cheshire, CW11 3HT