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Body filler
Page 94
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Boxer-Plast is the name given to a body filler produced by the Granville Chemical Co Ltd. It is claimed to have an indefinite shelf-life and that a smoothed surface is completely free from pin holes. The paint can be applied to it directly without the need to use a primer. Hardening time is normally between 15 and 30min at temperatures between 20deg and 30deg C.
Basically, Boxer-Plast is a plastics metal mixed with a filler and unsaturated polyester resin binder in proportions calculated to give the required results.
For hold, dent and scratchrepair work the recommended grade is Boxer-Plast H50. Grey-yellow in colour, this version is slightly flexible so that it can fill fairly large areas without cracking or loosening as a result of vibration. Boxer-Plast H85 is more ductile than H50. If used as a top skin over a main repair made with H50, the whole patch can readily be merged with sound metal panelwork. However, H50 is sufficiently fine when rubbed down to give a smooth finish without pin holes or roughness.
Once mixed with the hardener provided, all forms of BoxerPlast are as easy to work as putty and will adhere without difficulty to metal, wood, plastics, glass and painted surfaces. Once hardened, the material is not affected by water, oil, petrol or most acids. It does not shrink or contract and remains slightly elastic. It can be machined, tapped, drilled, filed, ground and sawn.
The filler can also be employed to repair engine cylinder blocks. It is supplied in 1kg and 7kg containers with a separate tube of hardener.
Made by Granville Chemical Co Ltd, Keighley, Yorkshire.