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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.
Other
help sheets & tips are available via the instructions & guides link above.

Polyurethane Varnish G4

  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 0 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.

  WORKING INSTRUCTIONS
1) Ensure cement render is clean, dry and porous - highly trowelled 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.

2) Repair cracks and damaged areas.

3) 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.

4) Allow to harden for 72 hours before washing down with clean water.  Then follow aquarist instructions.

CONSUMPTION
Varies slightly depending on porosity. On normal porous cement renders:
G4 Standard    - 4 coats = 840 g/sq.m (for 4 coats).

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

GRP. POOLS
Please see (ponds & tanks) guide to coating concrete pools with glass fibre.   

  Unit 4, Millbuck Way, Springvale Ind Est, Sandbach CW11 3HT.
Tel/Fax: (01270) 766685
www.resin-supplies.co.uk  Email: enquiries@resin-supplies.co.uk