Bond It Building Mastic (310ml) - White

SKU: HS4400
  • £5.49
Item in Stock | Usually dispatched within 24 hours

An oil based, gunnable pointing and sealing mastic for general exterior building use.

Offers superior adhesion to all building surfaces and can be overpainted when fully cures with most conventional oil based paints. Weatherproof in most applications.


Bond It BUILDING MASTIC can be used to seal and bed window and door frames manufactured from metal or wood. It can also be used for the maintenance of low rise building joints, seals and flashing and for pointing around precast building materials.

Properties: ‹

  • sag resistant ‹ 
  • low toxicity ‹ 
  • self repairing skin ‹ 
  • does not harden under skin ‹ 
  • over paintable ‹ 
  • adheres to most common building materials.


All surfaces must be clean, dry, sound and free from dust, oil, loose particles or any other contaminants that may hinder adhesion. Polythene tape or foam backing should be used in movement joints.


Apply using a standard sealant gun. Cut tip from cartridge, be careful not to damage the screw thread. Cut the nozzle at an angle of 45° to an opening slightly larger than the gap to be sealed, and fix to cartridge. Force the mastic into the full depth of the joint, ensuring good contact with both sides.

The material may be tooled to a smooth finish using a wetted spatula or spoon.

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