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Decothane Ultra is a high performance polyurethane coating with low odour used as part of the Decothane Ultra 15, 20 and 25 systems.


  • Low odour, one component polyurtehane for sensitive sites.
  • Totally seamless, single pack liquid applied membrane.
  • Cold applied – eliminating the risk of fire during installation.
  • Higher solids, VOC compliant to 2004/42/CE.
  • BBA certified system.
  • Highest fire ratings once installed (BROOF (t4) (t1).
  • Fast curing, develops early rain resistance.
  • Excellent adhesion to most conventional substrates.
  • Easy and quick application using Sika Reemat Premium Glass Fibre Matting.
  • Minimal disruption and low maintenance.
  • Elastic properties – tolerant of thermal movement.
  • Flexible, impact resistant membrane.
  • Can be applied all year round above 2°C.
  • Approved to ETAg 005 (Part 6).
  • Product Guarantee and Final Inspection Certificate available if installed by a Sika Liquid Plastics Quality Assured Contractor.


  • For Sika Liquid Plastics waterproofing systems, including 15, 20 and 25 systems.
  • For insulated and non-insulated roof designs.
  • For new construction and refurbishment projects.


  • British Board of Agrément (BBA) certified No. 14/5158.
  • European Technical Approval No. ETA – 14/0331.
  • External fire performance: BROOF (t4) & (t1) and classification under BS 476-3: 1958 EXT.F.AB.
  • Odournet – Test Number 456 – 2014.

Standard product features

Chemical base:

One-component moisture-triggered polyurethane.


Chemical resistance:

Strong resistance to a wide range of reagents including paraffin, petrol, fuel oil, white spirit, acid rain, detergents and moderate solutions of acids and alkalis. Some low molecular weight alcohols can soften the material. Contact Technical Customer Services for specific recommendations. Salt spray to ASTM B117 (1000 hours continuous exposure) and prohesion testing to ASTM G85- 94; Annex A5 (1000 hours cyclic exposure).

NBS Specification

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This product is associated with the following NBS Create clause:
45-35-50/340 Polyurethane waterproof coatings

NBS Specification

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This product is associated with the following NBS clauses:

Product specification

An important note about specifying



Sika Liquid Plastics


+44 (0)1772 259781

Product reference

Decothane Ultra


[Cloud Grey]
[Shale Grey]
[Slate Grey]

Manufacturer details

Sika House,
Miller Street,
Lancashire, PR1 1EA
Tel +44 (0)1772 259781
Fax +44 (0)1772 255670
NBS Plus