... running track/field(IAAF certificated)2 Installation InstructionsSubstrate PreparationPU2:1 track material is applied directly on top of prefabricated ... oil, grease, paint or other contaminants. Check the concave and convex surface of the place, and fill flat, flattened, sweep ... Two-component PU 2:1 material ratio is 2:1, EPDM granule and two-component PU2:1 material is 1:1 in weight. Use sprayer ...