MasterSeal SL 2 is a multi-component, self-leveling, elastomeric polyurethane sealant that is mixed and poured in place. When cured, it forms a tough, resilient joint seal that resists penetration and abrasion and remains flexible when exposed to weather and aging.



  • Horizontal

  • Interior and exterior

  • Expansion joints

  • Control joints

  • Pavers

  • Plaza decks

  • Industrial floors

  • Driveways/garages

  • Sidewalks

  • Decks

  • Parking structures

  • Substrates

  • Pitch pans

Product Highlights


  • Abrasion resistant to help handle pedestrian and vehicular traffic

  • Joint movement capability ±25% provides excellent flexibility for keeping moving joints weathertight

  • Weather resistant, producing long-lasting weathertight seals

  • Easy to gun and tool, speeding up application and making neater joints

  • MasterSeal 905 accelerator available for use in cold climate applications to help speed initial cure

  • No primer required for most construction materials, lowering installation costs

  • Wide temperature-application range makes masterSeal Sl 2 suitable for all climates

  • Ul listed; Passes 4-hour, 4-inch, fire and hose stream test when used with Ultra Block or mineral wool

  • Suitable for water immersion with documented performance in wet areas

  • Chemical cure allows for faster turnaround time

  • Bulk packaging results in less waste

  • Long pot life offers extended working time

  • Formulated to withstand pedestrian and vehicular traffic