PREPARATION STAGES OF METAL SURFACES BEFORE APPLICATION
The metal surface must be completely cleaned before applying the adhesive. A good preparation of the metal surface is required to obtain a good metal/rubber bond and to be resistant to water and corrosion. The oxide layers on the metal surface should be mechanically cleaned. Remove rust, scale or oxide coatings by suitable chemical or mechanical cleaning methods.
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Mechanical Cleaning:
Grit blasting is a recommended method of metal cleaning. Steel grit is used to blast clean steel, cast iron; for other nonferrous metals, the use of aluminum oxide is recommended.
Layover time between blasting and adhesive application should be kept to a minimum in order to avoid oxidation.
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Chemical Cleaning:
The process of chemically preparing the metal surface requires a different application for each metal group. Phosphating is a widely used chemical process for steel. The process applied under the paint in the aluminum surface coating process is called chromate.
APPLICATION
Mixing – KA&MELOCK KM 25 should be stirred thoroughly before use and during using to keep dispersed solids uniformly suspended.
Applying – Brush, roller, dipping or spraying methods can be applied for KA&MELOCK KM 25.
Experience has shown the following thickness of Primer and Bonding Agent provide the best result:
Primer approx. 8 μm – 10 μm
Bonding Agent approx. 15 μm – 20 μm
Drying- The bond coating can be dried at least 30 minutes at room temperatures. By using hot air drying up to 90 °C.; the time can be shortened. Metal parts with the Primer of Bonding Agent can be stored for several days in a clean environment.                                         

 Clean Up- Use xylene or toluene for clean-up.