Kling® Beta 2550 (HM) Liquid antistrip for hot mix. Heat Stability: Kling® Beta 2550 (HM) shows good stability in hot asphalts. Low Dosage: Kling® Beta 2550 (HM) is a concentrated product with low use level. 0.25-0.75% basis asphalt for hot mix is recommended, which should be confirmed in laboratory mix design tests. Kling® Beta 2550 (HM) is preferably added to the asphalt at the mix plant by means of a specially designed injection system. Alternatively, the product can be incorporated into the asphalt by mechanical agitation, pump circulation of the storage tank, or by injection into the asphalt loading line followed by recirculation through the truck bypass system until properly mixed.