GRP is a very strong and tough material. GRP has seven times the flexural strength of steel but GRP is very lightweight and flexible. It has high energy absorption properties which make it impact resistant and requires less maintenance.GRP roofing technologies are tried and tested so are extensively used for the refurbishment of existing & new roofs, by architects, local authorities, roofing contractors and major building contractors throughout the UK. This kit includes: 1x Roofing Resin 7.5kgs 1x Anthracite Grey Topcoat 4kgs 1x MEKP Catalyst 300g 1x 450g Glass Matting 5m2 4x Small Mixing Cups 2x 2'' Laminating Brushes 2x 4'' Laminating Brushes 1x Plastic Reusable Stirrers 6x Pairs of Latex Gloves 1x 3'' Paddle Roller 2x 4'' Poly Rollers 1x 4'' Roller Frame Roofing Resin has been formulated to give you excellent wet out when applying to our fibreglass matting. Once cured this resin has fantastic flexible proprieties that is required on a GRP flat roof. UV Resistant Grey Roofing Topcoat has been formulated to give your roof excellent protection against all the elements the weather is likely to bring. It has excellent flow out properties and is so easy to apply with either a polyester roller or brush. To enable both Resin and Topcoat to set (cure) you need to add a catalyst / hardener. This is called MEKP which is methyl ethyl ketone liquid; you need to add at a rate ofbetween 1 and 4% by weight depending on the weather conditions. Please note, if you would like to order a lighter grey topcoat, request this in the special instructions before checkout.