Description
G4 Pond Sealer Clear
G4 Pond Sealer is a moisture cured polyurethane which forms a non-porous seal on concrete rendered ponds, G4 pond sealer uses the moisture in the air and the render to harden, G4 pond sealer can be applied to slightly damp surfaces, but it is important that the render is sufficiently dry to be porous so as to enable the first coat of G4 pond sealer to bond and obtain a mechanical grip, G4 pond sealer can be applied in poor weather conditions, high humidity and at temperatures down to zero degree’s.
Koi Pond Construction Materials
As a general rule the pond should be constructed to be structurally sound since the G4 pond sealer only provides the waterproof seal, on no account use a P.V.A based sealer to seal or prime any surfaces, these materials can contain ammonia and also stop the G4 pond sealer from adhering to the render.
Ponds will normally be constructed with either brick, lightweight block or concrete block and then rendered, it is not necessary to add waterproofing agents to the render mix as this will increase the density of the render and can inhibit G4 pond sealer penetration, if a waterproofing agent has been used, simply rub down the surface with an abrasive to obtain a key.
If a fibre is used to give strength to the render it is necessary to burn off or sand down any fibres that are on the surface, as any fibres that protrude will cause leakage, G4 pond sealer will not bond to the fibres.
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 pond sealer, new render should be kept damp for the first three days and then allowed to harden for 21-28 days depending on conditions.
G4 Sealer is an excellent sealer for brickwork, but below the waterline the brick should also be rendered. The reason is that while the G4 Pond Sealer is able to seal hairline cracks G4 Pond Sealer is not capable of bridging larger joints, cracks or holes.
G4 Sealer Method of Application
Apply the first coat of G4 sealer by brush, a roller can be used but it is necessary to avoid puddling of the G4 sealer on the base, it is best to use a brush, allow the first coat of G4 sealer to become finger tacky ( like cello tape ) or dry enough to walk upon carefully, approximately 45-60 minutes depending on humidity, then apply 2nd coat of G4 pond sealer, when second coat of G4 pond sealer is finger tacky apply third coat of G4 sealer, no longer than 4 hours should pass between coats, if a colour is used, then use 2 coats of standard and 2 coats of colour, G4 sealer is mechanically hard after 24 hours but must be given 72 hours to chemically cure, after which the pond can be washed down with plenty of water, drained, and can then be filled.
We strongly recommend that you mix Black Knight Wizard Fibre or some similar fibre into the render mix. This will help prevent the frost cracking the render in winter and give additional strength to the structure.
G4 Sealer Clear Application
Apply first coat of G4 pond sealer Clear by brush, a roller can be used but it is necessary to avoid puddling of the G4 pond sealer Clear on the base. Allow first coat to become finger tacky or dry enough to walk carefully upon, approximately 45-60 minutes depending on humidity, then apply the second coat of G4 sealer Clear. When second coat is finger tacky apply Third coat. No longer than 4 hours should elapse between coats. Normally 3 coats of G4 sealer Clear is sufficient to build a continuous surface film but on very porous substrates a 4th coat of G4 sealer Clear may be required, apply as instructed above.
G4 Colour Application
The system is slightly different. When using G4 Sealer Colour the first two coats must be G4 Sealer Clear. This is because G4 Pond Sealer Clear provides the maximum non-porous seal and adhesion.
Follow the application instructions as detailed for G4 Sealer Clear but the last two coats will be G4 Pond Sealer Colour. G4 Pond Sealer 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 Pond Sealer with copious amounts of clean water. This water should be drained off. The koi Pond can then be filled. Consumption of G4 Pond Sealer will vary slightly according to the porosity of the substrate.
G4 sealer Clear – 3 coats = 550g per sqm for the three coats (approximately 185ml per squ. metre)
G4 sealer Coloured – 2 coats of Clear = 410g per sqm for 2 coats (approximately 205ml per squ. metre)
G4 Pond Sealer is available in Standard Clear, Black and Green.
If rain is expected make provision for covering the coated area, since water can damage the G4 pond sealer during the curing process. As soon as it is superficially dry water should not affect G4 pond sealer
R ford (verified owner) –
Very fast delivery
JOHN FOX (verified owner) –
Excellent service
Jayne (verified owner) –
Based on customer service, top marks. Phoned the office and had my questions answered fully by a very knowledgeable gentleman. The next morning 10 kg of G4 was on my doorstep. Very efficient. Thank you.
Craig W. (verified owner) –
Fast delivery and great communication
Jude (verified owner) –
Not yet used, but happy with prompt delivery. Many thanks.
Anonymous (verified owner) –
Perfect for the job of weather sealing garden troughs and 2 bird baths. Delivery was spot on. Thanks again.
Chee LEONG (verified owner) –
Good service and fast delivery. The product is superb. I have applied a total of 4 coats to a new rendered surface.
Val B. (verified owner) –
The product does exactly what it says on the tin, very happy with it.
anthony l. (verified owner) –
Done the job . Pleased with product.
Dennis Dole (verified owner) –
My name is Dennis and I’m the director of Golden Oaks Landscapes Ltd. Not only was I incredibly impressed with the customer service given at first point of contact, but i was very impressed with the delivery and return of excess product accidently ordered. The product itself did an amazing job of not only sealing the concrete with a waterproof layer but gave a very vibrant colour identical to the colour swatch on the site, was a very price effective option and no leaks after water test… needless to say we will be buying many products from Cotswold koi in the future and know our custom is in good hands.
Anonymous (verified owner) –
Arrived on time ,well packaged and does what it says on the can.