Cromar PRO GRP Top Coat 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. This product is a key component to the PRO GRP system.

Cromar PRO GRP is a Glass Reinforced Polyester flat roof system designed and engineered for flat roof applications. PRO GRP is a fully integrated all in one system where the components work together on virtually all types of flat roofs and vertical surfaces in any domestic or commercial application to provide the perfect all weather protection.

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.

Coverage:
0.5kg of Top Coat per m2
Therefore:
10kg = 20m2
20kg = 40m2

FEATURES AND BENEFITS

• Durable – resists heavy foot traffic
• Fire retardant
• Storm proof
• Frost proof
• Dark Grey (Anthracite) colour
• 25year manufacturer’s warranty when installed by an approved contractor

PREPARATION BEFORE APPLYING TOP COAT

It will be necessary to lightly sand the whole of the roof surface, corners and details. A smooth, unblemished surface will produce a high quality finish when top coated. After the roof has been sanded an Acetone wipe will greatly aid the adhesion of the final topcoat. Using a sanding pad or sandpaper (40-60 grit) lightly sand the corners, taking care not to create ‘holes’. Any unsightly fibres can be trimmed off using a safety knife. If a hole in the laminate is found this should be filled with catalysed resin before proceeding.

APPLYING TOP COAT

Calculate the amount of topcoat required, measure out into a bucket and add Catalyst to each batch of topcoat as you need it. Stir well for at least 1minute. Apply to the roof surface starting at the furthest point from the exit point on the roof and using the relevant sized soft application roller. The coat applied should allow the fibre pattern of the laminate to still be visible after application. If applied too thickly, the topcoat may crack over a period of time.

Using long smooth strokes, apply the topcoat to the laminated roof surface, finishing at the point of exit. If a non-slip finish is requested a grit or slate chippings can be sprinkled onto the topcoat. This needs to be added by hand or a dispensing applicator as the roof is top coated. It can be left uncoated to give a ‘mineral’ finish or re-coated with topcoat to give a textured finish.
For a neat finish use masking tape or battens to define the edges of the aggregated areas. When the topcoat has fully cured “grabbing” the aggregate, sweep off any excess.

CLEANING

To clean tools, use acetone in a re-sealable container. It is advisable to use paintbrushes with unpainted handles as the paint will contaminate the resin. Always use disposable latex gloves when handling resins and topcoat, use hand cleaner or wipes to clean off resin or topcoat. NEVER clean hands with acetone.

 Please note, it is NOT recommended to install PRO GRP in temperatures below 5°C and above 35°C ambient temperature. Please consult Cromar’s technical department for further information.