Flex Seal Primers

Flex Seal Primer with Stain Blocker Available in White. Flex Seal Primer with Stain Blocker is a fast-drying, solvent-based alkyd aerosol primer that seals and primes interior surfaces before finish painting. Its powerful stain-blocking formula stops most heavy interior stains — including water, smoke, nicotine, tannin, ink, felt marker, and grease — while bonding to a wide range of surfaces including wood, drywall, plaster, masonry, metal, and paneling. The cured primer is bright white and accepts latex or oil-based topcoats in as little as 1 hour, making it a fast, reliable solution for spot priming, stain isolation, and full-surface paint preparation. • Powerful stain-blocking formula — blocks water, smoke, nicotine, tannin, ink, felt marker, and grease stains • Fast-drying — tack-free in 15–30 minutes at 77°F/50% RH • Topcoat-ready in 1 hour — accepts latex or oil-based architectural topcoats • Bonds to wood, drywall, plaster, masonry, brick, concrete, metal, paneling & more • White flat finish — professional-grade cure color • For interior and exterior use • Controlled aerosol spray — steady side-to-side application for even coverage • Fast surface prep — prime and topcoat in the same day • Scuff-sanding required only on glossy surfaces — adheres to most prepared surfaces directly Use On Wood, drywall, plaster, masonry, brick, concrete, metal, paneling, wallboard. Glossy surfaces should be scuff-sanded for maximum adhesion. Not For Use On Surfaces subject to immersion, prolonged water contact, or under foot applications. WARNING: California Prop 65 Notice Flex Seal Metal and Auto Primer Available in Gray. Flex Seal Metal & Auto Primer is a fast-drying, rust-inhibiting aerosol primer built on a nitrocellulose lacquer formula. Its wide fan spray lays down a smooth, even coat and delivers superior adhesion to bare and coated metal, while providing strong protection against rust and corrosion. Sandable in as little as 5 minutes and topcoat-ready in 10, it is suited to large surfaces like automotive body work, wrought iron, and garage doors, as well as everyday indoor projects like furniture, cabinets, and trim. Sandable in as little as 5 minutes — dramatically cuts wait time versus most primers Wide fan spray delivers gun-quality coverage without a spray gun Rust-inhibitive — strong protection against corrosion on bare metal Superior adhesion to bare and coated metal Heat resistant up to 250°F — suitable near engines and other heat-adjacent parts Indoor and outdoor performance Topcoat-ready in just 10 minutes 15 oz can — more product per can than the standard 12 oz competitive format Use On Bare and coated metal, wrought iron, garage doors, mailboxes and outdoor fixtures, furniture, cabinets, trim, doors and drywall, auto body panels, lawn and garden equipment, and tools. Not For Use On We recommend testing on galvanized metal in a small, inconspicuous area first, since adhesion can vary on zinc-coated surfaces. Not intended for surfaces that exceed 250°F in continuous service.