Cortec Sealant & Admixture
Cortec Corp. has released a water-repellant sealant and a corrosion-resistant admixture.
containing time-proven “Migrating Corrosion Inhibitors.” The sealer forms a protective monomolecular corrosion-inhibiting layer.
MCI-2019 is a small-molecule product, which allows deep penetration into concrete and provides water repellency by chemically reacting with the cementitious substrate. Treated substrates are hydrophobic and retain their original appearance.
The product seals surface pores, which reduces ingress of chlorides and other contaminants. The sealer also reduces carbonation and protects from the ingress of wind-driven rain, extending the service life of structures. Its Migratory Corrosion Inhibitor action allows this product to migrate through even the densest concrete structures, absorbing onto embedded reinforcement to form a protective monomolecular corrosion-inhibiting layer. MCI-2019 contains no nitrites, phosphates, or chromates. An alkaline environment, such as new concrete, will catalyze the reaction and speed the formation of MCI-2019 Sealer’s hydrophobic surface.
Cortec’s MCI-2005 NS (Normal Set) is a liquid concrete admixture that protects rebar and other metals from corrosion. Specifically, it keeps steel reinforcing, carbon steel, galvanized steel and other metals embedded in concrete from the corrosion induced by carbonation, chloride and atmospheric attack without changing the set time of most concrete mixes.
MCI-2005 NS protects with a Migratory Corrosion Inhibitor function and a proven contact inhibitor. When incorporated into the concrete mix, MCIs seek out and form a corrosion inhibiting protective layer on metals. When used with repair mortars and grouts, MCI-2005 NS will migrate into adjacent concrete providing effective corrosion protection to rebar already in place.
Concrete mixes containing MCI-2005 NS show up to 30 percent less shrinkage than the same mix designs containing a calcium nitrite corrosion inhibitor. It can be added either to the mix water or powder, or it can be added into a manufacturer’s repair mortar formulation.
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