Bona Gap Master Nut is a silicone-free floor gap mastic, perfectly suited to a variety of jobs, including between parquet boards, around skirting boards and door thresholds. Bona Gap Master is based on acrylate and polyurethane. 100% odourless formulation that contains zero solvents and maintains a high level of flexibility throughout its lifecycle. High level of flexibility Suitable for sanding and overcoats Silicone-free Solvent-free 14 colours available - Maple, Ash, Light Beech, Dark Beech, Dark Oak, Light Oak, Cherry, Smoked Oak, Wenge, Teak, Red Exotic Wood, Nut (Walnut), White and Black. Expansion is approximately 7%. Available size: 0.75L Silicone free mastic designed for filling larger gaps. 18-20 hours drying time. Note: These colours can be taken as a guide only.