Mapeker grey is a rapid setting cement-based adhesive for fixing a wide variety of ceramic, porcelain and mosaic tiles. Recommended also for fixing dark colour stone such as slate and black granite. Suitable for walls and floors - cementitious or gypsum (after priming with Primer G) Suitable for rigid plywood overboarded floors (Min 15mm screw fixed at max 300mm centres) Can be used in wet and exterior areas such as showers and balconies Pot Life 20 mins Ideal for use in wet and exterior areas such as showers and balconies Open time 10 mins. Mapei Rapid Set Flex is a cement-based rapid-setting adhesive. It's suitable for interior and exterior floor and wall installations of ceramic and porcelain tiles and non-moisture sensitive natural stone. Complement your tiles perfectly with Rapid Set Flex Grey.