G4 Pond Sealer (Clear)

34.5092.75 (ex vat)

Deep bonding plastic coating for concrete, quick and simple.

No Primer needed, can be used at low temperatures.  Seal out lime.

G4 Pond Seal is a one component polyurethane which forms a non-porous, tough, durable but flexible seal.  It is browny translucent in  colour. Seals porous substrates such as concrete and brick. G4 will not seal concrete or lightweight blocks, these need to be rendered before application. When used for sealing ponds, any substrate below the water line must be cement rendered. G4 can be used at low temperatures, down to 0°c and in areas of relative high humidity. G4 cannot be used on bitumen of pond liners.

SKU: G4 Pond Sealer Categories: ,


G4 pond sealer is applied to concrete ponds to prevent water from penetrating the concrete. Additionally it prevents toxic substances such as lime leaching into the pond. G4 pond sealer is polyurethane base, and can be applied directly to concrete, bricks and porous stone.

Ensure that the surface is dust free and dry. It cures within 6 hours. Full mechanical hardness is achieved after 24 hours and chemical resistance after 72hours. It may be applied at temperatures from 00C. Normally 3 layers is applied for a durable seal. Coverage is approx 550gm per sq.m for the 3 applications.

Warning! Persons already sensitised to diisocyanates may develop allergic reactions when using this product. Persons suffering from asthma, eczema or skin problems should avoid contact, including dermal contact, with this product. This product should not be used under conditions of poor ventilation unless a protective mask with an appropriate gas filter (i.e. type A1 according to standard EN 14387) is used.’ Protective gloves to be supplied with this product.

Hazard Statement – Bonda G4 Damp Seal


H226 – Flammable liquid and vapour.

H315 – Causes skin irritation.

H317 – May cause an allergic skin reaction.

H319 – Causes serious eye irritation.

H332 – Harmful if inhaled.

H334 – May cause allergy or asthma symptoms or breathing difficulties if inhaled.

H335 – May cause respiratory irritation.

H336 – May cause drowsiness or dizziness.

H351 – Suspected of causing cancer (if swallowed, if inhaled).

H373 – May cause damage to organs through prolonged or repeated exposure (if swallowed, if inhaled).

H411 – Toxic to aquatic life with long lasting effects.


Flammable Health Hazard / Hazardous To The Ozone Layer Serious Health Hazard Hazardous To The Environment

Additional information

Weight N/A

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Data Sheets


G4 Pond Sealer MSDS


pdficon_largeG4 Pond Sealer TDS

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