Micro-Chek® 20 is an EPA registered, broad spectrum antimicrobial for the protection of plasticized PVC and similar products from microbial attack. Micro-Chek® 20 contains 20% of the active ingredient 2-n-octyl-isothiazolin-3-one (OIT) in a plasticizer carrier and is heavy metal-free. Micro-Chek® 20 is particularly recommended for use in products such as tenting, tarpaulins, coated fabrics, architectural signage, floor tiles and other coverings that may be exposed to stressful environments. Micro-Chek® 20 should be added to the product with the plasticizer used in the formulation to which it is incorporated. Direct addition to stabilizers, fillers and pigments should be avoided. Micro-Chek® 20 may also be blended with finished plastisol by mixing well. Optimum use levels depend on the product formulation and the intended end use environment to which it will be exposed. Typical use levels range from 0.2-2.0%.