solid polyurethane

IMPU Insulation Coating

Aegion Coating Services offers an injection-molded polyurethane (IMPU) system specially designed for deep water submersion. IMPU is most commonly used in insulated and concrete coated pipelines to provide insulation as well protection to the field joints. It can be applied using one of three corrosion coating choices offered by Aegion Coating Services. The IMPU material consists of mixing two components together to create a flexible yet solid solution to the offshore industry. We have achieved great success applying the IMPU material on several deep water lines. IMPU can be performed on a spool base or on a lay barge.

IMPU is compatible with the following corrosion coatings:

  • Heat shrink sleeve
  • Liquid primer
  • Fusion Bonded Epoxy
  • SPU for the insulation of the girth weld

 Technical Data
 Hardness  40 (Shore D)
 Tensile Strength
 2200 PSI
 Elongation  240%
 Tear Resistance
 175 PSI



  • Removable mold
  • Chemical gel time is very rapid and provides short cycle times for increased production
  • Mercury-free chemicals
  • Chemical components stay in solution and do not separate
  • Each shot results in a consistent joint
  • Nonflammable polyurethane components
  • Stringent health and safety standards
  • Tough outer surface resists damage during pipeline lowering and subsea activities
  • Simple, quick installation for short cycle times






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