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GRP Roofing Topcoat 20kg

Original price was: £107.66.Current price is: £104.99. Excl Vat

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GRP Roofing Topcoat 20kg

Product Overview

This GRP Roofing Topcoat 20kg is a dark gray isophthalic topcoat that is used in conjunction with their GRP fiberglass matting/resin system for flat or sloping roofing applications that require high-quality waterproofing. It is designed to be applied with a roller and exhibits good leveling characteristics and sag resistance on inclined surfaces.

Key Features:

  • Dark Grey Color: This topcoat has a dark gray color that matches the RAL-7011 color standard.

  • Isophthalic Coating: This topcoat is made from isophthalic resin, which is known for its excellent water and weather resistance.

  • Roller Application: This topcoat is designed to be applied with a roller for even coverage and a smooth finish.

  • Good Leveling Characteristics: This topcoat has good leveling characteristics, which means that it will spread evenly and create a smooth surface.

  • Sag Resistance: This topcoat is resistant to sag, which means that it will not drip or run when applied to inclined surfaces.

  • Waterproof and Weather Resistant: This topcoat is waterproof and weather resistant, which means that it will protect your roof from water damage and the elements.

  • Maintenance-Free Surface: Once this topcoat is applied and cured, it will provide a maintenance-free surface that will not require repainting or recoating.


  • Flat or sloping roofing applications
  • General purpose fiberglass applications


  • Provides a durable and watertight barrier for your roof
  • Easy to apply and maintain
  • Creates a smooth and aesthetically pleasing finish
  • Long-lasting protection against water damage and the elements


1. What is the coverage of this topcoat?

The coverage of this topcoat will vary depending on the thickness of the application. At a recommended thickness of 500-600 microns, the coverage is approximately 0.6 kg per m┬▓. This means that a 20 kg container of this topcoat will cover approximately 33.2 m┬▓ at the recommended thickness.

2. What is the catalyst that I need to use with this topcoat?

You will need to use ResiRoof Catalyst with this topcoat. The recommended catalyst-to-resin ratio is 2% by volume. For example, you would use 20 ml of catalyst per 1 kg of topcoat.

3. How long does this topcoat take to cure?

The curing time of this topcoat will vary depending on the temperature and humidity. At a temperature of 20┬░C and 50% humidity, the topcoat will be tack-free in about 30 minutes and fully cured in about 2 hours.

Additional information

Weight 20 kg