Cromar PRO GRP Topcoat is a dark grey, pre-pigmented, isophthalic acid based, filled fire-retardant roofing top-coat that conforms to BS476 Part 3:2004, FAB classification. Recommended for use in flat roofing applications where regulations specify a fire-retardant system.

Designed for roller application which exhibits good levelling characteristics and sag resistance on inclined surfaces. The cured top-coat is tack-free and water- tight with excellent water and weather resistance providing a maintenance-free surface.

What is PRO GRP?

GRP stands for Glass Reinforced Polyester and is also known as Glass-Fibre.

This system is cold applied on site, giving it a seamless and flexible weatherproof finish that resists water, heat and frost.

The resulting surface gives a strong architectural finish that looks very impressive. If maintained properly it will last as long as the building stands.

Cromar have developed this technology further to produce the perfect all weather protection for any flat roof. PRO GRP can be applied in small domestic situations right through to large industrial environments.

Benefits of a GRP System

• COLD APPLIED - no heat required
• EASY TO FORM - around complex situations
• VERY DURABLE - resists heavy foot traffic
• NON-SLIP WALKWAYS - can be incorporated
• CLASS LEADING ROOFING SOLUTION - that far exceeds traditional methods
• VIRTUALLY MAINTENANCE FREE - for very long periods of time
• IMPACT RESISTANT - due to its ultra hard finish
• FIRE RETARDANT
• HIGHLY ECONOMICAL SOLUTION

Quick Links - Click To Jump To Section:

• Features & Benefits
• Application
• Coverage
• Typical Properties
• Storage

Features & Benefits

• Excellent water and weather resistance providing a maintenance-free surface
• Tack-free and water-tight
• Exhibits good levelling characteristics and sag resistance on inclined surfaces
• Designed for roller application
• Conforms to BS476 Part 3:2004, FAB classification
• For use in flat roofing applications where regulations specify a fire-retardant system
• Part of the Cromar Pro GRP Roofing System

Application

For full application instructions download the PRO GRP Installation Guide.

Cromar PRO GRP Topcoat is designed for use at ambient temperatures between 18℃ and 25℃, and requires the addition of 2% medium activity MEKP catalyst to achieve an efficient cure.

For optimum performance the top-coat should be applied to a dry, dust-free surface and built up to film thickness of 500 - 600 microns to achieve the desired fire retardant characteristics in the finished structure.

Before use, the temperature of the top-coat should be 18 – 25℃. For application at lower ambient temperatures a high activity MEKP catalyst can be used at an addition level of 2%.

Coverage

The values above are recommended coverage rates for estimating purposes we would recommend coverage rates or 1.5kg/m ² for resin, and 0.5 kg/m ² for top coat.

Liquid Gel Coat Properties

Health & Safety

Please refer to the Safety Data Sheet on Cromar PRO GRP – Topcoat, downloadable from the "data sheets" tab towards the top of the page.

Always read and understand the Safety Data Sheet before working with this product.

Directly mixing any organic peroxide with a metal soap, amine or other polymerization accelerator or promoter will result in violent decomposition.