Still an economical industry standard, Magnesium Chloride reduces dust by pulling moisture out of the air to the road surface. TOP-M is a unique blend of agriculture based derivatives and complex organic polymers in a hygroscopic mixture to provide the ultimate in dust abatement. Previously sold as DOPE-30, this specialized lignosulphonate- emulsion blend gives the most residual buildup out of all dust suppressant products, which makes it the best long-term dust control option. DLA is an asphalt emulsion with specialized wetting agent to help it penetrate and set up faster than traditional cutback materials.