Laticrete 4237 Latex Additive is a specially designed latex additive for use with 211 Crete Filler Powder to make a high strength latex thin bed and medium bed adhesive up to 15 mm. For installing all types of tile, stone and agglomerates.Also for use with Portland cement to make slurry bond coats for mortar beds and for use with thin set adhesives to give improved performance and longer open time. Superior bond strength Flexible and shock resistant; rated for extra heavy traffic conditions Weather and frost resistant for interior and exterior use in all types of climates Proven performance; used in all types of applications for over 50 years. Safe, economical and easy to use; non-hazardous, non-flammable.