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2 pack wood filler suitable for all types of wood

  • Quick drying and highly flexible
  • Will not shrink or crack
  • Compatible with any single or 2 pack finish
  • Suitable for interior or exterior wood
  • Can be used on all wood types
  • Available in 500 grams

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Cosmobois is a 2-pack wood filler that can be applied to all types of wood. Quick drying and highly flexible Cosmobois will not shrink or crack and when fully cured can be cut, screwed, and drilled. Cosmobois is easy to sand, both manually and mechanically and is compatible with any single or two pack finish. It can also be tinted with universal colourants up to 2% before mixing in the hardener for a specific coloured finish.

Ideal uses for Cosmobois wood filler

  • Filling dents and scratches in wooden door panels
  • Repairing damage to garden gates
  • Restoring vintage furniture
  • Completing joinery work to a higher standard
  • Repairing damage to decking in the garden

Always read the Cosmobois Product Information before using and follow the instructions carefully.

Surface Preparation

Surfaces must be clean, dry and free of dirt, grease, grime, all loose material and other contamination.
Remove all loose and old finishes from around the area to be repaired.
Thoroughly abrade the surface using a coarse abrasive paper.
Wipe surface clean with Acetone, Ethyl Acetate, Methylated Spirits (De-natured Alcohol) or similar to remove any abrasion residue. Do not use White Spirit.


Tinting (optional):
Add 2% (max) of universal colourant to the filler and mix in well before mixing with the hardener.

Add 2% of hardener to quantity of filler for 10 minutes drying. As a guide 1 coffee bean size of
hardener to 1 Chestnut size of filler.
Cold weather increase amount of hardener.
Hot weather decrease amount of hardener.
Ensure hardener and filler are well mixed.
Increasing or decreasing the amount of hardener does not affect the overall curing time.

Work filler in to crack or hole.
Smooth off with filling knife.
For repairs deeper than 25 mm – build up in layers allowing too dry between applications.
For a smooth finish sand (100 grit paper) before applying finish.
Allow 24 hrs before machining (Drilling, Mechanically Sanding etc).

Clean up

Clean tools immediately after use with Acetone, Ethyl Acetate or similar.
Dispose of any unused hardener / filler mixture in accordance with local regulations. Do not put back in container.

Things to Remember

  • For narrow cracks rake out to enlarge.
  • Stir filler well before mixing with hardener.
  • Do not mix filler and hardener in the can.
  • Apply between 10°C and 25°C.
  • Store in original container.
  • Keep from freezing and high temperatures.


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Tools: Filling knife
Suitable for: Interior and exterior use
Clean up: Acetone, Ethyl Acetate or similar
Drying Time: 10 minutes at 20°C
Curing Time: Allow 24 hours before machining
Suitable Surfaces: All wood types