Sika® CNI


Sika® CNI is a calcium nitrite-based admixture designed to inhibit the corrosion of steel in reinforced concrete. Sika® CNI contains a minimum of 30% calcium nitrite by mass and meets the requirements of ASTM C1582, Corrosion Inhibiting Admixture and ASTM C494 / AASHTO M194 Type C.

Sika® CNI is recommended for conventional steel reinforcement as well as prestressed or post-tensioned concrete that will be exposed to chlorides from marine environments or deicing salts. Sika® CNI will extend the service life of structures by effectively inhibiting corrosion, in areas such as parking garage decks and support structures, bridge decks, marine structures and many others.   Sika® CNI is a corrosion-inhibiting admixture that provides protection against corrosion in reinforced concrete structures. Sika® CNI:
  • Extends the service life of reinforced concrete structures.
  • Is recommended for use in all types of reinforced concrete, precast and/or prestressed concrete as well as ready mix applications.
Sika® CNI can be used as an accelerating admixture that provides:
  • Accelerated setting time across a wide range of temperatures.
  • Increased early and ultimate compressive and flexural strengths
   Sika® CNI does not contain intentionally added chlorides.