KILZ® ORIGINAL Primer No. 1000 is a powerful stain blocking formula that blocks most heavy interior stains including water, smoke, tannin, ink, pencil, felt marker, grease, and also seals pet, food and smoke odors. Trusted by pros for over 40 years! It has excellent adhesion properties to help paint adhere to multiple interior surfaces. Not recommended for floors. Kilz Original No. 1003 is (350 VOC).