Kelmore MoreFlex Rapid S1 White 20kg Adhesive Tile Adhesives for Walls and Floors Tileflair Kelmore MegaFlex Rapid S2 Tile Adhesive 20kg Grey Kelmore MegaFlex Standard S2 One Metre Squared Ltd Kelmore MoreBond Standard C2 White Tile Adhesive Kelmore MegaFlex Standard S2 Adhesive White 20kg EMC Tiles. Experience the ultimate in tiling with Kelmore's MegaFlex Rapid S2 adhesive. With its highly polymer modified formula, this adhesive provides excellent bond strength and flexibility for a wide range of tiles on various backgrounds. Perfect for underfloor heating and wet areas, MegaFlex Rapid S2 sets quickly and is ready for grouting in just 3 hours!