Liquid Applied Waterproofing Membranes


PmB Polyurethane Waterproofing System

The PmB bridge deck waterproofing system contains the technically advanced PmB membrane, a two-part, spray-applied, durable protection and waterproof coating that offers ultimate crack bridging capabilities. The high-performance membrane is 100% polyurethane, containing no fillers or additives, and is VOC-free. PmB is spray-applied in single or multiple layers using a two-component spray pump, with parts A and B mixing at the spray gun for application to the primed substrate. Once applied, PmB has exceptional bond strength and elastomeric capability.


System Benefits:

  • Seamless installation providing a homogenous, water-tight seal
  • Installs at ambient and substrate temperatures 32 to 95 °F (0 to 35 °C)
  • Rapid setting: 5-8 second gel time, tack free in 1 minute, walkable in 10 minutes, elastomeric in 45 minutes
  • High abrasion and chemical resistance
  • Sanded key coat and hot melt tack coat layers provide adhesion point for asphalt overlay
  • Blue tint of membrane helps ensure consistent coverage rates


  • Concrete bridge decks designed to take asphalt overlays
  • Backfilled or earth covered structures
  • Certain below grade waterproofing applications