Formerly known as Flexcrete’s Cementitious Coating 851, Intercrete 4841 has been used in independent tests spanning over 30 years that confirm its 100% effectiveness as a barrier against chlorides
The tests were carried out at the VINCI Construction Technology Centre in Bedfordshire and began in 1988. A 2mm thick film of Flexcrete’s Cementitious Coating 851, now known as Intercrete 4841, was applied to a concrete slice. This sealed in a chloride ion diffusion cell and is still providing full protection over 30 years later.
Continuous tests show the barrier properties of Intercrete 4841 have remained the same throughout the test period. This is a testament to product’s consistent and long-lasting performance.
Says Chris Lloyd, cofounder of Flexcrete Technologies Ltd, acquired by AkzoNobel in 2017:
“The performance demonstrated in this test by Intercrete 4841 is unparalleled,”
“In VINCI’s experience, many coating systems degrade over time when on test in the cell, and even products that initially perform well can subsequently blister, resulting in more chloride ions passing through the product. Intercrete 4841 has not shown any signs of deterioration despite being fully immersed in the chloride solution for 30 years. It would have taken 271 years for the product cell with the Intercrete 4841 to reach the same chloride concentration that the uncoated specimen reached in just 98 days.”
Cementitious Coating 851 was originally introduced in 1985 as a two-component waterborne polymer coating. Its since been rebranded as Intercrete 4841 and remains the market-leading chloride corrosion protection system. It works by forming a hard alkaline shell with excellent pressure resistance. This protects against corrosion and other damage.
Due to its outstanding performance in the field along with such positive and comprehensive test results, Intercrete 4841 is widely used across the globe. It is specified as a protective waterproofing barrier for new and existing reinforced concrete. Intercrete 4841 excels in challenging environments exposed to the elements. This makes it an excellent alternative to replacing concrete structures and helping to exceed the expected lifespan of the substrate.