Bona Gapmaster 310ml Wood Filler Bona Gap Master is a silicone free floor gap filling mastic designed to fill gaps between parquet blocks, around skirting boards and door thresholds. Based on polyurethane and acrylate. It contains no solvents, is odourless and can be used with all parquet finishes. It retains a high degree of flexibility. Key Benefits: • High degree of flexibility• Can be sanded and overcoated• Solvent free• Silicone free Please note: Colour chart image is for a guide only.