Available in Clear, Black, Green & Blue
Seals
concrete ponds
G4 Pond Seal is a moisture cured polyurethane which forms a non-porous
seal on concrete rendered ponds, G4 uses the moisture in the air and
the render to harden, it 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 to bond and obtain a mechanical grip,G4
can be applied in poor weather conditions, high humidity and at temperatures
down to zero degree's.
Construction
Materials
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, these materials
can contain ammonia and also stop the G4 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 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 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, new render should
be kept damp for the first three days and then allowed to harden for
21-28 days depending on conditions.
Method
of application
Apply the first coat 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 the first coat to become finger tacky ( like cellotape ) or dry
enough to walk upon carefully, approximately 45-60 minutes depending
on humidity, then apply 2nd coat, when second coat is finger tacky apply
third coat, 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 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.
Usage
