Extreme Block® Interior/Exterior Stain Blocking Waterbased Primer

Keep topcoats looking fresh with Extreme Block® Interior Exterior Stain Blocking Waterbased Primer. Stain Locking Technology helps trap stains like smoke, fire, nicotine and tannin bleed in the first coat for a uniform finish without unsightly bleed-through. When stains exceed the capability of standard waterbased primers, professional painters trust Extreme Block® to quickly restore properties to a fresh condition with minimal disruption to occupants.