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Urethane Base Coat

CP350 is a next generation, self levelling rapid curing polyurethane waterproofing membrane, typically mixed with water. Not suitable as the final wearing surface, must be over-coated with a suitable sealer such as CP951 Urethane Sealer.

CP350 can be used either as part of a TREMCO CP Urethane waterproofing system, or as a stand-alone waterproof membrane. Typical applications include car parks, balconies, walkways, plant rooms, roofs and similar installations.

  • Highly elastomeric liquid-applied waterproofing membrane with excellent crack bridging properties
  • Fully bonded to substrate - prevents water ingress
  • Rapid curing - can be overcoated in as little as 6 hours


CP350 is typically mixed with 500 ml water/unit to accelerate curing although certain applications may not require any water – refer to project instructions for details on this and for general application instructions.
For full application details, contact tremco illbruck customer services on 01942 251400.

Technical data

CompositionCP350 is a polyurethane based moisture curing system, typically mixed with water
Specific Gravity1.28
Pot Life
(@ +20°C)
4 hours
Max Tensile Stress2.2 MPa
Elongation at Break 1040%
StorageStore in dry shaded conditions between +5°C and +25°C
Shelf Life12 months when stored as recommended in original unopened packaging

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