PUR, NC, hybrid or water-based paints
Flowable, film-forming surface coating of wood, wood-based materials, glass, metal and plastic materials based on synthetic resins and used for decorative and/or protective purposes. The paints are applied by spraying, rolling, brushing or dip-coating.
Good to excellent resistance to chemicals, moisture and mechanical stress; seamless coating; decorative design
Coating with a varnish or paint takes away the absorbency of the substrate. For this reason, only those adhesives can be employed that have been designed for use on non-absorbent surfaces or for combination bonding (absorbent/non-absorbent). When joining an absorbent surface (wood) with an already painted surface, it is possible to use a PUR adhesive or a special varnish glue. If the application requires bonding two painted surfaces with each other, it is necessary to choose a 2-component adhesive, a contact adhesive (Pattex Liquid) or an assembly adhesive (Pattex PL 300).
On the one hand, the strength of the bond depends on the adhesion of the adhesive to the paint, but on the other hand also on the adhesive force between the paint and the substrate to which it is applied. If, for instance, bonding a piece of painted wood, it is not the wood but the paint coat that is joined with the other surface.
Interactions, like for example bleeding or discoloration, between the adhesive and the adjoining paint surface cannot be completely ruled out. If in doubt, we always recommend carrying out preliminary bonding tests.