Apply the finishing topcoat when the laminate is semi-cured, this means you can walk on the roof without any stickiness and the glass layer is impossible to move with your finger. If you find that you have run out of time for the day and you are loosing light then make sure that you cover and apply the finishing topcoat within 24 hours.

Using 40 grit sanding paper, gently sand the surface and the corners of the cured Fibrelast base making sure to remove any unwieldy fibres. Next take your sharp stanley knife and cut away any excess cured fibreglass matting extending out beyond the trim, in the industry this is known as green trimming.

Open the tin of Fibrelast topcoat and give the product a good stir before adding it into a smaller mixing bucket, just to make sure everything is mixed correctly.

The finishing topcoat requires the same amount of catalyst as the base system (refer to our catalyst guide for measurements) , however if you are applying the finish at the end of the day with the temperature dropping then you may need to add more catalyst. Use an infrared thermometer to gauge the temperature of the surface and the topcoat.

Add the Fibrelast topcoat to a small mixing bucket with the required amount of catalyst and mix well. Start to apply the Topcoat to the roof using the specialist velour roller at approx 1mm thickness. If you apply the Topcoat too thick then it may crack when cured and too thin it will not efficiently cure. Use a smaller roller or brush to coat the trims using a piece of off cut trim to protect the fascia from the drips.