Stain Blockers

185 AMMONIUM ZIRCONIUM CARBONATE

Effectively blocks tannins in stains and pigmented coatings, especially white paints.

186 POTASSIUM ZIRCONIUM CARBONATE

Similar to 185, but without ammonia odor and zinc oxide.

228 Tannin Stain Inhibitor

Corrosion Inhibitor and pigment-grade tannin blocker.