Mastics & Epoxy

Adhesives, crack fillers and resins for bonding, repairing and strengthening marble, granite and engineered stone. Polyester mastics (the FS range and GL 88) are the workshop standard for bonding and filling; two-part epoxies (FLAGPOX, GL 80, GL 34) are solvent-free and used where joints must stay clear or slabs need reinforcing.

White marble and light stone: FLAGPOX PRO 777 and FLAGPOX PRO CLEAR 777 don’t yellow.
Clear joints and cracks: FS TRANSPARENT SOFT and LIQUID, FS WATERCLEAR GEL SPECIAL for vertical cracks, CRACK FILL WATERCLEAR for wide gaps.
Bonding stone: FS MASTIC SOFT and LIQUID, FS UNIVERSAL CLEAR GEL and LIQUID; FLAGPOX 5010 for coloured stone.
Repairing and reinforcing slabs: GL 80 for marble cracks, FLAGPOX 1005 for cracks and large pores, GL 34 to resin whole slabs.
Colour matching: FS COLOURING TINT for polyester and epoxy.
Not sure which glue to use? Read our marble adhesive glue guide: when to choose polyester mastic, when to choose epoxy, and how to get an invisible joint.