The possibility of increasing the quality of paving asphalts by modifying them with an inexpensive, nontraditional additive - Kashpir slate softener with a significant content of resins and asphaltenes - is demonstrated. In the concentration of under 7 wt. %, this additive gives asphalt elasticity on the level of expensive polymeric asphalt binders (PAB), decreases the brittleness temperature by 2-3degrees, and also causes a more stable and plastic colloidal "sol system." When the softener and BP-3M adhesive additive are incorporated in asphalt together, the thermal stability of the additive increases and the asphalt acquires high adhesion to mineral materials for a long period.