Weber Set Rapid SPF Low Dust is a flexible, fast-setting tile adhesive for walls and floors available in white or grey. It is suitable for internal and external ceramic, porcelain and natural stone tile applications. Particularly ideal for substrates subject to movement or expansion. Contains a high grab and non-slip formula for wall and floor tiling. Unique low-dust technologyâ„¢ reduces the amount of dust during the mixing process. Ability to withstand light foot traffic in just 2 hours, with a working time of 30 minutes.