Pond Coating

We can supply both G4 and Epoxy paintable pond coating (Pond Kote)

G4 Pond Seal
G4 Pond Seal is a moisture-cured polyurethane, which forms a non-porous seal on concrete.
G4 uses the moisture in the air and substrate to cure or harden.
It can be applied onto slightly damp substrates.
It is important that the substrate is sufficiently dry to be porous so as to enable the first coat of G4 to bond and obtain a mechanical grip.
G4 can be applied in poor weather conditions, high humidity and at temperatures down to 0°C.
G4 seals out lime.
G4 is available in clear (browny translucent) — Mid Green — Black.

Construction
As a general rule the pond should be constructed to be structurally sound since the G4 only provides the waterproof seal.
On no account use a P.V.A. based sealer to seal or prime any surfaces as these materials can contain ammonia.
Ponds will normally be constructed with either brick, lightweight block or concrete block.
It is necessary to apply a cement render since the surface is too open and absorbent to seal with G4.
It is not necessary to add waterproofing agents to the render mix when G4 is being applied since they increase the density of the render and can inhibit penetration of the G4, however, in practice,
it is known that G4 performs well on renders containing waterproofing agents. Fibre Mesh can be used to increase the strength.
It is necessary that the fibres are either burnt or sanded off prior to coating with G4 as some will project from the render and can act as a wick, since G4 will not bond to the fibres, which can result in a general leakage.
It is also necessary to remove them since the fibres will also damage the scales of the fish.
The cement render should be trowelled to an even surface but not to a smooth dense plaster like finish since this prevents the penetration of G4.
Bear in mind that a half-inch render should be kept damp for 3 days.
New render should be allowed to harden for 21-28 days depending on conditions.
G4 cannot be used to seal over bitumen, P.V.C. or Butyl Rubber linings.
It will not bond to the P.V.C. or Butyl Rubber although it will not attack them.  

Application
G4 - Standard
Apply first coat of G4 by brush — a roller can be used but it is necessary to avoid puddling of the G4 on the base. It is best to use a brush.
Allow first coat to become finger tacky (like sellotape) or dry enough to walk carefully upon — approximately 45-60 minutes depending on humidity — then apply 2nd coat. When 2nd coat is finger tacky apply 3rd coat.
No longer than 4 hours should elapse between coats.
Normally 3 coats of G4 Standard is sufficient to build a continuous surface film but on very porous substrates a 4th coat may be required, apply as instructed above.
If rain is expected make provision for covering the coated area, since water can damage the G4 during the curing process. As soon as it is superficially dry water should not affect G4. 
 
G4 - Colours
The system is slightly different. When using coloured G4 the first two coats must be G4 standard.
This is because G4 standard provides the maximum non-porous seal and adhesion.
Follow the application instructions as detailed earlier but the last two coats will be G4 coloured.

G4 - Cure (Hardening)
G4 is mechanically hard after 24 hours and workable on some 6 hours after final application, however, 72 hours must elapse for full chemical cure, before washing down the G4 with copious amounts of clean water.
This water should be drained off.
The pool can then be filled.

Consumption
Consumption will vary slightly according to the porosity of the substrate.
The coverage is based on practical experience gained from many users.
G4 Standard — 3 coats = 550 gms/sqm (for the 3 coats)
G4 Coloured System
1st and 2nd coats G4 standard = 410 gr/sqm (for the 2 coats)
3rd and 4th coats G4 coloured = 400 gr/sqm (for the 2 coats)

Pond Kote 
A water based resin based coating designed for easy and safe application onto most common pond substrates (surfaces). 

It possesses the properties of conventional resin coatings but without the usual toxic solvents used as a dispersing agent.

Two coats are required to form a waterproof coating.

Coverage is between 5-10 metres square per litre per coat.