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Prymax GRP Primer 1kg

£23.57 Excl Vat

Prymax GRP Primer 1kg

Prymax GRP Primer is a fast-drying, multi-substrate primer that provides a strong adhesion for polyester resins to concrete, wood, and metal. It forms a hard, flexible seal that prevents moisture ingress, consolidates fragile surfaces, and creates a tough, hardwearing finish that can be painted, wallpapered, or tiled over.


  • Fast drying
  • Multi-substrate
  • Strong adhesion
  • Moisture resistant
  • Consolidantes fragile surfaces
  • Hardwearing finish
  • Paintable, wallpaperable, or tilable
  • Coverage: 500g per square metre for all three coats


  • Prepping substrates for polyester resin applications
  • Sealing and protecting concrete floors
  • Preparing walls for painting or wallpapering
  • Consolidating fragile surfaces

How to use:

  1. Ensure the substrate is clean, dry, and free from dust and dirt.
  2. Apply a thin coat of Prymax GRP Primer to the substrate using a brush, roller, or sprayer.
  3. Allow the primer to dry completely before applying polyester resin.
  4. Apply two further coats of Prymax GRP Primer for a thicker, more durable seal.


Wear gloves and safety glasses when handling Prymax GRP Primer. Avoid contact with skin and eyes. If contact occurs, rinse immediately with water.


Store Prymax GRP Primer in a cool, dry place. Do not store it in direct sunlight or at temperatures above 30°C.

Shelf life:

Prymax GRP Primer has a shelf life of 2 years when stored correctly.

I hope this new description is helpful. Please let me know if you have any other questions.

Prymax is an easy to apply liquid polyurethane that forms a hard but flexible plastic seal on almost any porous surface. Treat your wood, plaster, brick, concrete and more to an armour coat, sealing out moisture, consolidating fragile surfaces and leaving a tough, hardwearing glosscoat that can be tiled onto, painted or wallpapered over.Coverage: For all 3 coats allow 500g per square metre.

Additional information

Weight 1 kg