Instruction For USE : With many surfaces, substantially ... With many surfaces, substantially stronger and more uniform bonds are obtained by preparing them with a primer prior to the application of the silicone sealant. For obtaining best results, the following steps should be followed on all surfaces except silicone rubber. Thoroughly clean and degrease the surface using a 2-rag wipe method and appropriate solvent, when needed. Cleaning procedures are defined in the Americas Technical Manual. Allow the surface to dry. Apply a thin coat of DOWSIL 1200 OS Primer by applying with a clean white rag or brush. In most cases, a thin primer film will give best adhesion. If a white chalky residue is noticed after several minutes of drying time, wipe away the chalky residue with a clean rag.
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