MasterSeal SL 2 multi-component, self-leveling polyurethane sealant

Formerly: Sonolastic SL 2


MasterSeal SL 2 description:

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.

Recommended uses:

  • Horizontal
  • Interior and exterior
  • Expansion joints
  • Control joints
  • Pavers
  • Plaza decks
  • Industrial floors
  • Driveways/garages
  • Sidewalks
  • Decks
  • Parking structures
  • Pitch pans

What are the unique features of MasterSeal SL 2?

  • 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
  • Bulk packaging results in less waste
  • Formulated to withstand pedestrian and vehicular traffic

What are the benefits of MasterSeal SL 2?

  • Abrasion resistant to help handle pedestrian and vehicular traffic
  • Joint movement capability ±25% provides excellent flexibility for keeping moving joints weather tight
  • Weather resistant, producing long-lasting weather tight 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
  • Long pot life offers extended working time
  • Chemical cure allows for faster turnaround time

US / Canada Product Information

Data Guide

Data Guide (French)

Data Guide (Spanish)

Certification Letter

LEED Letter

LEED v4 Letter

MasterSeal SL 2 FIN SLG - Safety Data Sheets

MasterSeal SL 2 FIN SLV - Safety Data Sheets

MasterSeal SL 2 SLV INTL - Safety Data Sheets

MasterSeal SL 2 SLV - Safety Data Sheets

MasterSeal 905 (formerly SL2 Accelerator) Safety Data Sheets


Safety Data Sheet (SDS)

Find all available safety data sheets for this product.


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