Alkali Silica Reactivity (ASR) is a chemical reaction that can occur in concrete between the alkali in cement (Na2Oe) and the silica in aggregates. The result of this reaction is a silica gel that readily absorbs water in the pore solution, expands and causes the concrete to crack. Admixtures with Lithium components are now recognized as the most effective choice in ASR mitigation and are included in the new American Association of State Highway and Transportation Officials (AASHTO) Guide Specifications on ASR and in a number of State Department of Transportation (DOT) specifications. PREVENT ASR-LN is a Lithium Nitrate liquid admixture for concrete that chemically mitigates ASR expansion and will increase a structure’s service years. PREVENT ASR-LN has a minimum of 30% Lithium Nitrate by mass and weighs approximately 10.0 lbs./gallon.


  • Improved durability of concrete
  • Extends the service life of concrete structures 
  • Provides effective ASR protection to the concrete from the presence of alkalis
  • No adverse effects on plastic or hardened concrete properties
  • The use of low-alkali cement is not required
  • Can be used with approved pozzolans
  • Lithium Nitrate has more than a fifty year history of testing and research on the succesful effectiveness in controlling ASR in concrete and concrete structures


PREVENT ASR-LN mitigates ASR in all types of concrete and is used for:

  • Warehouses
  • Highways and Bridges
  • Airport Runways
  • Commercial Structures
  • Parking Garages

Technical Data Sheet  MSDS