Based on our proven fantastic strength and toughness our recommended minimum thickness for most ‘working’ truck / van / trailer ‘floor’ areas is 1.5 – 2mm. However, SPEEDLINER PRO^™ can be applied thicker or thinner as required. The SPEEDLINER PRO^™ coatings are usually measured in millimetres and NOT mils / thousandths of an inch like most other paint and spray coating products.