Trelleborg 118 is a pre-lubricated sliding seal that is stretched onto the spigot of the manhole. Additional lubricant is not required for joint assembly.
The seal is designed with a sliding mantle which is internally lubricated. The mantle is fully closed to ensure the lubricant stays in place. This design permits installation with low force, as there is no friction between rubber and concrete, and makes the system easy to center during jointing. During installation the thin mantle slides over the body of the seal.
Joint performance is dependent on dimensional accuracy and surface finish of socket and spigot.
The Trelleborg 118 Pre-Lube Manhole seal meets all relevant current European standards.