Biofast is a mineral adhesive with an extremely low chemical additive content. Longer workability with accelerated adhesion for high-performance bonding. No vertical slip of porcelain, ceramic and natural stone tiles. Eco-friendly with an Eco5 rating (SGS). Ideal for use in Green Buildings. Coverage; (mixing ratio 29%) = for each 1mm thickness, one bag will cover approximately 20 m2. Shelf life 12 months.