Prime Intense is a 100% polyurethane sealer designed to reduce ‘tannin bleed’ in timber species such as Blackbutt. Tannin bleed describes a phenomenon where a blotchy, green look is seen after applying waterborne coatings on timber species containing high amounts of tannin; this effect is most noticeable with Blackbutt. Intense gives a greater depth and colour compared to other waterborne primers and is suitable for use on most timber species. Intense is compatible with all Bona top coats