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Quick-drying 2-Pack fiberglass reinforced polyester filler

Choukrout packaging
  • Quick-drying, dry in just 10 minutes
  • Repairs, fills, seals and levels multiple surfaces
  • Highly elastic so will not crack or shrink
  • Use on multiple surfaces – steel, wood, plastic, ABS, concrete, PVC and more
  • Compatible with single and 2-pack paints
  • Available in a handy 600g pot (1.32 lb)

In stock

Original price was: $17.48.Current price is: $8.54.

Choukrout is a 2-pack glassfiber reinforced polyester filler that can be applied to multiple surfaces including but not limited to wood, metal, stone, concrete and plastic. It is quick-drying and hardens uniformly so will not shrink or crack. When fully cured, Choukrout 2-pack fiberglass polyester filler can be mechanically cut, screwed, drilled, filed and sawn.

Choukrout is easy to sand, both manually and mechanically, and will not clog abrasive paper. It has excellent adhesion to a wide range of surfaces and can be used to repair, fill, seal and level multiple surfaces.  Offering excellent impact resistance Choukrout is compatible with any single or two-pack finish. It has high chemical resistance against water, petrol, mineral oil and dilute acids and alkalis.

Ideal uses for Choukrout 2-pack fiberglass polyester filler

  • Dealing with rust holes and torn metal in automotive situations
  • Repairing and waterproofing caravan and trailer damage
  • Sealing cracks in brick, concrete and stone
  • Fixing leaks in tanks – metal, concrete or GRP lining
  • Restoring damaged hard plastic objects such as drainpipes
  • Repairing agricultural equipment and machinery

Areas of Application

Choukrout 2-pack fiberglass reinforces polyester filler has many possible applications, including but not limited to those listed below:

  • Automotive: Bodywork (holes and cracks), dents, radiator, battery tray, housing etc.
  • Trailer: Body repairs, waterproofing etc.
  • Marine: Boats (wooden, metal, GRP) – hull and deck. Protects against corrosion.
  • Building Industry: Sealing of cracks etc in Concrete, Brick, Stone etc. Leaks in tanks – metal, concrete, or GRP lining.
  • DIY: Repairing rigid plastic objects, PVC, polyester, ABS etc. Vases, sinks, models etc.
  • Electrical: All insulation’s (12,000 volts per mm), battery tray etc.
  • Agriculture: Troughs, tanks, agricultural machinery etc.
  • Central Heating: Pipes, radiators, boiler, thermal insulation etc.
  • Plumbing: Supply and drainage pipes, fixings, sink, hand basin, bath etc.
  • Roofing: Roof, down-pipes, guttering, skylight etc.
  • Metalwork: Fences, doors, metal shutters, wrought iron etc.
  • Foundry: Blowhole, defective casts, cracks, molds etc.

Surface Preparation

Surfaces must first be clean, dry and free of dirt, grease, grime, all loose material and other contamination. Remove all rust from around the area to be repaired back to bright clean metal.

Remove all loose and old finishes from around the area to be repaired.

Thoroughly abrade the surface using a file or coarse abrasive paper.

Wipe the surface clean with acetone, ethyl acetate, methylated spirits (de-natured alcohol) or similar to remove any abrasion residue.

DO NOT use white spirit.

Applying Choukrout 2-pack fiberglass reinforced polyester filler


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

Applying Cosmofer

Work the filler into the crack, hole or dent and smooth off with a filling knife. For repairs deeper than 50 mm – build up in layers allowing it to dry between applications. For a smooth finish, sand with 100 grit paper before applying your finish. Allow 24 hrs after application before machining (drilling, mechanically sanding, tapping 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 it back in the 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


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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: Bonds to ferrous and non ferrous (aluminum, copper, lead …) metals, wood, concrete, stone, marble, cement, sandstone, mosaic, PVC, polyester, ABS …