Benjamin Moore INSL-X Max Block Primer- Gallon- WhiteProduct Details Years of testing on multiple substrates in both interior and exterior environments have resulted in a product with proven effectiveness across multiple types of stains and tannin bleeding type woods such as redwood and cedar. Excellent adhesion to vertical and horizontal surfaces Low VOC formulation Ideal for blocking water stains, smoke stains, and nicotine stains Blocks household stains and odors Seals wood knots Apply in