It fills body repair areas, scratches, and imperfections. Manufacturer: High Teck. Q: Which hardeners are used with High Teck 7030-1?. Q: How is High Teck 7030-1 mixed as a sealer?. Size: 1 Gallon. Coverage: 280 Square Feet per Gallon at 100 Percent transfer efficiency, at 2 Mils.