Since Viscous establishment, we have focused on the R & D and production of butyl series and petrolatum series products. Adhere to the spirit of craftsman, ingenuity and craftsmanship, all resources of the company, independently develop formulas, R & D equipment, design production processes, and strive to create high-quality butyl rubber series & petrolatum series products
Standard Specification for Joints for Concrete Pipe, Manholes, and Precast Box Sections Using Preformed Flexible Joint Sealants
Manhole sealant is an all weather butyl rubber sealant for concrete joints. Butyl sealants are far superior to mastic made from oil or asphalt because they are rubber based.