is an impermeable, white pigmented, solvent-based isolating and blocking primer for problematic substrates, prevents the bleeding of stains in subsequent coats, and equalizes unevenly absorbent surfaces. The isolating effect is excellent against nicotine, soot, oil, tar, grease, rust, water stains, fire damage, tannins, felt-tip pens, etc. DUROTEX has good adhesion and hardening properties, is block-resistant, and does not yellow.