Zinsser B-I-N Aqua Stain Blocking Primer is the ultimate water-base primer, sealer, stain killer and odour blocker. The high hiding formulation offers exceptional adhesion, without the need for sanding, and is ideal for both interior and exterior use. B-I-N® AQUA effectively primes, seals, blocks stains and locks in problem odours, while expertly sealing knots and sap streaks.

Zinsser B-I-N® AQUA is a water-based stain-blocking primer engineered to tackle tough surface challenges without the harsh fumes. Its minimal VOC content (<0.1%) means virtually odour-free application with simple soap-and-water cleanup. This versatile primer bonds to virtually any surface—from wood and plaster to tile, glass, and metal—without sanding or de-glossing required. It's the only full-surface knot blocker in the Zinsser range, making it ideal for interior and exterior projects alike. Whether you're sealing porous substrates or blocking stubborn stains from nicotine, smoke, water, grease, or mildew, B-I-N® AQUA delivers reliable coverage and odour control in one powerful formula.

*For knots and stains, allow 2 hours to dry.