Stains can appear across both solvent and water based products, causing a discolouration to the final finish.
Stains can appear for a number of reason such as timber extractives, nicotine, water staining, tar.
Remove as much of the contamination as possible by rubbing down the surface using a suitable abrasive tool or paper. Using a correct primer is the key to keeping stains at bay, take a look at some of our suggestions below with a direct link to each product featured at the bottom of the page.
Crown Trade Alkali Resisting Sealer - Ideal for priming, sealing and stabilising new, dry alkaline surfaces such as new lime plaster, cement and concrete. It can also be used to seal stains, stabilise powdery chalky surfaces and promote adhesion to glass, ceramics and some plastics.