Zinsser 1-2-3 Plus Primer — Water-Based, Stain Blocking, Quick-Dry, 11 oz

Revitalize surfaces with Zinsser 1-2-3 Plus

Zinsser 1-2-3 Plus blends oil-based performance with the ease of a water-base primer. It blocks water stains, tannin bleed, and smoke marks, while penetrating porous surfaces to seal them for a smoother topcoat. The formula features low VOC and low odor for more comfortable projects, making indoor prep less obtrusive.

Designed for interior and exterior applications, this all-in-one primer is easy to use and dries quickly. It adheres well to a wide range of surfaces, helping reduce bleed-through and topcoat failures. It’s often described as the first water-based primer that blocks water stains, simplifying the prep stage and providing a solid foundation for color changes or refinishing.

Key benefits in real-world use

• Stain blocking keeps water-related stains, tannins, and smoke marks from showing through topcoats.
• Fast-drying formula allows topcoats to be applied in about an hour under typical conditions.
• Excellent adhesion that sticks to a variety of surfaces, including wood, drywall, plaster, masonry, and metal.
• Low VOC and low odor contribute to a more comfortable indoor project experience.

Usage, coverage, and tips

This product is marketed as a QT INT/EXT LTX primer and comes in an easy-to-use kit. It is suitable for all projects that require a dependable base layer before paint. Coverage ranges from approximately 350 to 400 square feet per gallon, depending on surface type and porosity.

• Easy-to-use kit and straightforward application process.
• First water-based primer that blocks water stains for a clearer topcoat.
• Dries in about one hour, ready for recoating once dry.
• Sticks to most surfaces and provides a solid foundation for topcoats.
• Rational choice for interior and exterior projects where stain blocking is a priority.

Whether you’re refreshing a stained wall, preparing a surface for a bold new color, or sealing porous material before finishing, Zinsser 1-2-3 Plus offers a versatile, low-odor option that helps you achieve a smooth, even base for your next layer of paint.