This is an advanced, specially modified acrylic copolymer blend containing special additives that produce a sound base over porous and degraded concrete roof tiles. This coating will ensure the adhesion of subsequent coatings and is designed to lock-in the powdery, weathered layer of the original concrete roof tile colour coat. This is achieved by utilising specialised technology that allows the penetration of the sealer components which stabilises the weathered layers of the tile. The diagram below illustrates the function of Foreverfinish Primer Sealer compared to a conventional acrylic primer.