We value your privacy

Our website uses cookies to enhance your experience. By continuing to use our website, you are agreeing to our use of cookies. Necessary cookies are always enabled. You can read more about our Cookie Policy in our Privacy policy

We value your privacy

FibreGlassDirect - Buy Fiberglass Supplies & Materials

Shopping Cart 0
£0.00

G4 Sealer

In stock
Only %1 left
SKU
conf_g4_sealer
As low as £28.08 £23.40

G4 pond sealer is applied to concrete ponds to prevent water from penetrating the concrete. It is also used in Fibreglass Roofing as a damp proof barrier before any fibreglass lamination is applied. A must have for damp-proofing and a highly recommended product.

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.

Please be aware that from 24th August 2023, all professional and industrial workers (employed or self-employed), using mixtures containing diisocyanates at a concentration of 0.1% or more (e.g., insulation and filler foams used in construction etc.), must undergo mandatory training.
  Diisocyanate QR Code

Hazard Statement - Bonda G4 Damp Seal Danger 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.
Health & Safety Warning Labels

G4 Sealer MSDS (251.44 kB)
Ask a Question

We would recommend priming the lead with a G4 Damp Seal first. G4 should be thinly applied with a brush or roller and allowed to tack before applying the resin and chopped strand matting. 


Brand Description
History Color sit amet, consectetur adipiscing elit. In gravida pellentesque ligula, vel eleifend turpis blandit vel. Nam quis lorem ut mi mattis ullamcorper ac quis dui. Vestibulum et scelerisque ante, eu sodales mi. Nunc tincidunt tempus varius. Integer ante dolor, suscipit non faucibus a, scelerisque vitae sapien.