Silco 6400 Multi-Fiber Fibreglass Filler Putty - 1.8kg

Silco 6400 Multi-Fiber Fibreglass Filler Putty - 1.8kg

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Quick Link Code:  QL7475



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Plastic SpreadersPlastic Spreaders


  • A two-component bridging filler paste designed to repair damaged body panels on vehicles.
  • Can be used on bare steel, and original paint surfaces.
  • Polyester glass fibre filler is a two component chemical paste used for the bridging of holes and rust in surfaces such as steel and GRP, form a very hard durable surface and can be sanded and shaped if required. It is easily covered with standard polyester filler or can be over-painted directly.
  • Not for use on zinc and aluminium surfaces.

Surface preparation and instructions for use:

  • Polyester filler can be used on the following surfaces:- Bare steel, degrease and abrade with P80 paper.
  • Original paint surfaces (with the exception of thermoplastic acrylics) degrease and abrade with P80 grit paper.
  • GRP degrease and abrade with P80 grit paper.


  • 20°C : 15 - 20 min
  • Pot life at 20°C : 3 - 4 min

Mixing Ratio:

  • 100 parts by weight polyester filler, 3-4 parts by weight hardener for polyester filler.
  • The exact mixing ratio is not critical, although over or under catalyzation may affect the gel time.
  • Do not greatly over catalyse the paste as this will not significantly speed up the gel time and could lead to bleed through and bleaching problems when over-painting later.
  • Staining may also occur where too little hardener is used. 
  • Do not overdose! Excessive quantity of hardener can cause colour change on the topcoat.

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