BEHR^® Multi-Surface Stain-Blocking Primer & Sealer No. 436

Preparation

• All surfaces should be properly prepared and cleaned.
• Remove loose paint, wash off chalk, dirt, and grease with detergent, rinse and allow to dry.
• Remove mildew stains with a mildew stain removing product.
• Scuff sand glossy and metal surfaces and repair imperfections.
• Remove all dust with a damp cloth, allow to dry.
• Allow new masonry stucco, concrete, concrete masonry units (CMUs), and split-faced block to cure for 7 days and test pH prior to applying primer.
• The pH must be 13.0 or lower before coating.
• Remove efflorescence with a mixed solution of one part vinegar and one part water, rinse thoroughly with clean water and allow to dry.
• FOR EXTERIOR SURFACES: For new or uncoated wood, use a product such as BEHR PREMIUM® No. 63 All-In-One Wood Cleaner.
• Etch galvanized metal with a concrete and masonry cleaner and etcher. 

Application

• Apply when air and surface temperatures are between 35-90°F (2-32°C).
• Use a high quality 3/8-1/2" nap roller cover, nylon/polyester brush or an airless sprayer (.015-.021" spray tip, 60 mesh filter).
• Stir primer occasionally.
• Do not thin if using a roller or brush; however, if using a sprayer and thinning is required, thin with water at a rate of no more than 1/2 pint per gallon.
• Spot prime patched areas first, then follow with a complete primer coat.
• Two coats may be needed over heavy stains and tannin-rich wood.
• On stained surfaces, topcoat in 4 hours; for heavy stains, topcoat in 16 hours.
• Topcoat within 30 days.

Disposal

• For disposal of empty containers, unused paint and soiled rags, contact your household refuse collection service.