PREMARK® preformed thermoplastic manhole protection ring systems are designed with a subtle incline that provides a smooth ride for daily traffic. Each ring is made of durable non-beaded 125 mil. PreMark preformed thermoplastic material. As many as three preformed thermoplastic rings can be combined to negotiate severe grade changes.
A kit consists of 3 rings with the same inside diameter but a different outside diameter so a height difference from 1/8” to 3/8” can be adjusted by using one, two, or three rings. PreMark preformed thermoplastic manhole protection rings are available in a variety of diameters and come in grey or black. PreMark preformed thermoplastic is applied using the Flint 2000EX or Magnum Heat Torch.
