ProBlock Quick Dry Oil-Based Interior Primer

Description

Permanently lock away stubborn interior stains and prepare rough surfaces with Sherwin-Williams ProBlock Quick Dry Oil-Based Interior Primer. This professional-grade alkyd undercoat is engineered to deliver heavy-duty stain-suppression across residential and commercial renovation projects. The fast-drying oil formula blocks and isolates difficult bleeding stains, including severe water rings, smoke soot, grease markers, crayons, inks, and active wood tannins. It seals porous architectural substrates like bare drywall, plaster, and raw wood trim to prevent uneven topcoat absorption and ensure a completely uniform sheen. It dries to the touch in minutes and cures to a hard layer that can be topcoated with premium acrylic latex or oil-based paints in as little as one hour, helping you complete multi-stage paint jobs in a single day.