Odor Less is a low-odor, modified synthetic primer sealer carried in a special solvent that dries quickly and is effective over many different stains, including water, tannin, smoke, rust, pencil, ink, nicotine and coffee. Odor Less primes, seals and protects and can be used on bare or previously painted surfaces, interior drywall, plaster, wood or masonry and exterior masonry surfaces. Can be used as a spot primer for exterior wood shingles/composition siding.