Stain Blocking Primer from Protek is a timber treatment designed to stop wood tannins, preservative residue and rust from nails from bleeding through your chosen top coat. This water based primer can be applied by spray, brush or roller. 

• Excellent tannin blocking performance
• Fast drying, can be top coated in an hour
• Cationic primer with flash rust resistance for nail heads
• Low VOC
• Suitable for softwood, planed & rough-sawn timber
• Made in the UK

Protek Stain Blocking Primer can be applied by spray, brush or roller and dries within an hour. Two coats are recommended if applying a white or a light colour top coat. If applying to bare untreated timber we recommend first applying Protek Wood Preserver ++ before the primer. This primer will stop the tannin bleed from knots in the wood but it will not stop the resin coming through. If the timber is resinous a knotting agent should still be applied to the knots. Protek Stain Blocking Primer must be fully dry before applying the top coat. In their wet forms Stain Blocking Primer and other top coats are not compatible and should never be mixed.