G4 polyurethane primer

  • For wood, metal and stone
  • 1-component primer
  • Fast curing

One-component G4 polyurethane resin as an adhesive layer for polyester resins on wood, concrete, masonry, old polyester and epoxy layers, metals etc. Also suitable for model making, as a base layer for further processing or as a finishing layer. By applying G4 adhesive primer, you get a very good adhesion with the polyester laminating resin in combination with the fibreglass mat you want to apply later.

The G4 adhesive primer consists of one component, so you don't need to mix the polyurethane resin with a hardener and you can apply the resin directly to the substrate with a flat brush or a fleece roller. You can dilute the bonding resin with PU thinner if desired. Depending on temperature and humidity, you can then continue processing polyester after just 30 minutes.

By evaporating, the bonding resin will dry and, when dry, you can continue processing the polyester resin.

Product properties

Consumption: approx. 200 gr/m² per coat
Packaging: 1 kg, 5 kg, 10 kg (larger quantities on request)
Drying time: 0.5 - 4 hours (depending on climate)
Repainting: apply polyester resin within 12 hours after drying
Shelf life: 1 year in closed packing for at least 6 months

We have a number of recommendations for working safely with polymers. At Polyestershoppen you will not only find the polymers themselves, but you can also purchase all the protective equipment you need from us. If you have any doubts or questions, please contact our customer service. We can give you advice on how to work safely with polymers.

Safety equipment


Code Description
H226 Flammable liquid and vapour.
H315 Causes skin irritation.
H317 May cause an allergic skin reaction.
H319 Causes serious eye irritation.
H334 May cause allergy or asthma symptoms or breathing difficulties if inhaled.
H335 May cause respiratory irritation.
H373A May cause damage to organs through prolonged or repeated exposure.
H351A Suspected of causing cancer.
P101 If medical advice is needed, have product container or label at hand.
P102 Keep out of reach of children.
P103 Read label before use.
P210 Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
P241 Use explosion-proof [electrical/ventilating/lighting/…] equipment.
P303+P361+P353 IF ON SKIN (or hair): Take off immediately all contaminated clothing. Rinse skin with water [or shower].
P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
P405 Store locked up.
P501B Dispose of contents / container in accordance with local, regional or international regulations

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