A 0.5 coefficient of friction is commonly accepted for general floor areas, while .8 is acceptable for wheelchair ramps. Our Elcometer test equipment can test the dry film thickness. The Osha (Occupation Safety Health Administration) says a safe slip resistance as specified by 1910.68 is .5 coefficient of friction. Additional floor test specifications by ADA: 0.6 flat surface 0.8 ramped surfaces as defined by ADA accessibility guidelines (ADAAG).