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COLD REPAIR COMPOUNDS

How to prepare the surface Heavy contamination due to oil or grease must be removed using a cleaner. Remove all loose rust and surface coatings.

Roughen surface with a coarse file, rasp, abrasive paper or saw blade. Create if possible a cross scoring pattern. A die grinder, needle scaler or angle grinder may also be used. If grinding, make sure the surface is roughened, not polished. Carry out a final degreasing with a cleaner before applying product. Rubber surfaces must be roughened using the special abrading tool.

CRITICAL applications (eg. pump repairs) should be abrasive blasted to a minimum standard SA 2 1/2. Profile 75-125 microns. The blasting medium should be angular grit. Parts which have been salt or chemically impregnated should be heated to 80°C by hot air overnight to sweat out the contamination. Remove contamination using a cleaner then re-blast the surface. Parts which should not adhere to the products must be coated with a release agent.

Roughening increases the surface area and gives a better ”key”.

Abrading tool for rubber.

Use release agent on the threads of a bolt.

Most castings have an open structure that contaminants can penetrate into.

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