Water/Wastewater
Coating of New Pre-Cast Concrete Manholes
Coating of New Pre-Cast Concrete Manholes
Project Details
Problem
Concrete manholes, when in contact with hydrogen sulfide gases, would deteriorate in a short amount of time. Having manholes coated after being installed, would have resulted in exposure to H2S gases and would have resulted in a more costly and more disruptive coating process.
Solution
Prepare concrete substrate. Apply two (2) coats of Belzona 5811 Immersion Grade (available in three colors – Black, Gray and Beige). For this application, the customer chose a dark base coat (Black) and Beige topcoat, making the manhole brighter and improving visibility in the area. The “after” picture shows the manholes, inspected after 12 years of being in-service. Manhole substrate and coating were deemed to be in perfect condition.
Product Applied
Belzona 5811 Immersion Grade
Product Detail – Belzona 5811 Immersion Grade is a two-component, solvent-free coating system designed to provide protection to metallic and non-metallic surfaces, operating under immersion conditions in contact with aqueous solutions. 5811 is 100% solids, contains no VOC’s, is flexible, can be applied to virtually any surface type and is an outstanding long term coating solution.
