LAS-320 is an eco-friendly product used to seal Hot Mix Asphalt (HMA) pavement from weathering, water intrusion, prevent freeze/thaw damages and provide a fuel repellent pavement surface.


LAS 320 can be applied with a bituminous distributor, or push brooms by hand. Typical application rates average 100 ft2/p/gal or 2.5 liters/M2 depending upon pavement surface conditions. LAS-320 is non hazardous, nontoxic, non flammable, and environmentally safe. It can wear off of the surface stones in the asphalt  but will remain on and in the asphaltic material. The chemical interaction with asphalt prevents damage from petro-chemicals, acids, and water. This degradation is a direct result of surface wear of the aggregate material in the asphalt mix and protection continues to be effective at elevations below the top wearing surface. Most damage to asphalt surfaces are related UV deterioration and petroleum based fuel spills, LAS-320 is specifically formulated to prevent the destruction from both of these conditions.


 Drying time will vary based on ambient conditions, usually from 20 to 40 minutes. Enviroseal recommends that the surface not be used for 24 hours so that LAS-320 can cure properly, striping can be done within the first hour.


When additional skid resistance is important, a sand sized aggregate can be combined with the applied mixture. Tests using slag steel sandblasting medium like “Black Beauty” 40 / 60 grit is very effective and economical to use. Testing has shown 0.26 pounds per square yard (250 grams/M2) is sufficient and application should be done immediately to the treated surface before drying.


LAS-320 is supplied in both concentrate and ready to use formulations. The concentrate is mixed one part water to one part LAS-320 concentrate. Packaging is in 5-gallon pails, 55-gallon drums, and non-returnable 275- and 330-gallon IBC poly totes. LAS-320 is shipped from our manufacturing facility in Port St. Lucie, Florida.


  • Application of LAS-320
  • Coated vs Uncoated
  • Finished driveway
  • LAS-320 Asphalt Sealer
  • LAS-320- Atlanta-7


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