Bona Gapmaster Sealant 310ml Tube - Available in 15 colours

Bona Gapmaster Sealant 310ml Tube - Available in 15 colours


Product Information

Bona Gapmaster 310ml  x 1 tube

15 Colours to choose from menu

Bona Gap Master is a silicone and solvent-free, flexible mastic filler making it ideal for filling gaps between floor boards, skirting and door thresholds. Easily and quickly applied with a mastic gun. Can be sanded if required and overcoated with water-based varnishes.

Bona Gap Master is non-flammable, dries within 18-24 hours with a full hardening time of 2-3 days. Manufactured from a polyacrylate compound making it very low odour.

One tube fills 33 linear metres based on 3mm deep and wide gaps.


Ensure that surfaces to which Bona Gap Master is to be applied are clean, dry and free from contamination and loose materials. Wider gaps in floors may require rope, foam backing rod or other method to prevent the filler from falling through the gap during application


Cut the dome seal of the tube with a sharp knife, taking care not to damage the thread. Screw the nozzle on to the tube. Cut the tip of the nozzle at an angle to suite the size and shape of the gap to be filled.

Squeeze the trigger of the mastic gun to get the Gap Master flowing from the end of the nozzle. Apply a continuous bead of filler ensuring that contact is made with surfaces on either side of the gap. Immediately smooth bead with a flat edge, sponge or wetted finger.

Bona GapMaster can be sanded after 18 - 24 hours and over-coated with a varnish or paint

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