Restoration Shop Low VOC High Solids Urethane Primer Quart Kit for Automotive Paint System Our Restoration Shop High Gloss Urethane Primer is formulated at less than 2.1 VOC, designed to offer superior fill, productive dry time, ease of sanding, and excellent adhesion. This is a two-component urethane system with a 4:1 Mix Ratio This primer is VOC compliant 1 - Quart of Restoration Shop LOW VOC HIGH SOLIDS PRIMER (RP 2100) 1 - Half Pint of Urethane Hardener (RH 4201)