Ensure that surfaces to which the product is to be applied are clean, dry, sound and free from dust, loose material and any other contaminants that may impair adhesion.
Very porous surfaces only, may be primed using a diluted PVA (5 parts water to 1 part PVA by volume), such as EVO-STIK Evo-Bond PVA. The primer must be allowed to dry. Apply the product either by mastic gun or knife to the required areas, excess caulk should be removed immediately with a flat blade to give a smooth finish. This product cures by water evaporation and must be allowed to dry fully before any paining or decorating is done.
Answered by: Bostik Product Support
Date published: 2020-11-05