FS MASTIC SOFT is a two-component adhesive composed of unsaturated polyester resin dissolved in styrene, with added mineral fillers. It is specifically designed for bonding natural and engineered stones. Its soft consistency makes it particularly suitable for vertical surface applications, delivering a seamless, defect-resistant finish that machines, sands, and polishes to a perfect sheen. Cleanup is simplified by using Epoxy Remover to clear tools of residual resin.