Sika® Margel VPI 580 is a vapour phase corrosion inhibitor, which is inserted within the concrete structure close to the reinforcing steel. The product has been specifically developed to ensure the corrosion inhibiting vapours are released over a period of 12 months. This results in a well bonded layer of corrosion inhibitor around the reinforcing steel resulting in a passivated protective layer that blocks chloride, water and oxygen.
This system is particularly useful when existing coatings cannot be removed or reinforcement needs protecting and is located at depths greater than Sika® Ferrogard®-903+ can penetrate.