Sublimation Coating for Cotton 4 oz. 120 ml. Polyfog for Fabric Sublimation ink will only work on polyester fabric therefor you need a coating like Polyfog. Polyfog places a polymer into the cotton to make it sublimation ready. Simply spray the area that will be sublimated and allow to dry. Use either a spray pump bottle to administer or a commercial sprayer. 50/50 blends also need this product to enhance the colors.