Mix Ratio: 4:1 with High Teck 77130 clearcoat. Compatible System: High Teck 77130 2.1 VOC Multi-Purpose Clearcoat. A: High Teck 77133-4 is used with High Teck 77130 2.1 VOC Multi-Purpose Clearcoat. A: High Teck 77133-4 mixes with 77130 clearcoat at a 4:1 ratio.