Step 2: Cleaning and, if necessary, roughening
Make sure the substrate is cleaned well; the substrate of parts to be bonded must be clean, smooth, dry, homogeneous and free of dust, rust and grease. So it must no longer have any ‘extra layer’ of grease or other solids or liquids.
You can clean it with a cleaner or remove contaminants mechanically by sanding or blasting in combination with cleaning. Remember to use your personal protective equipment (PPE) here. If necessary, you can also roughen the surface a little more for an even better result, before cleaning it again.
Is the substrate contaminated or does it need degreasing? For a substrate of glass, metal, plastic or polyester, use fluff-free paper for this with the right cleaner, which you rub several times in one direction. Do not rub back and forth; you will only spread the dirt back over the substrate again. Avoid touching the (clean) surfaces you want to bond, or wear powder-free gloves. Let the substrate dry before you continue with the next step (the open time and drying time depend on the cleaner that you use).