KHIA headerKnow-How in Action


Belzona® Protects Rubber Pipes At Wwtp From Uv Attack



Water / Wastewater (WATR)



Valves, Pipes and Fittings (VPF)


Customer Location:

Wastewater Treatment Plant, BC, Canada


Application Date:

August 2004


Application Situation:

Flexible rubber transfer pipes on digester



UV attacks the rubber over a period of time causing it to degrade and eventually become brittle.



Belzona® 3211 (Lagseal)

Belzona® 3921 (GSC Conditioner)



Rubber pipe with stainless steel flanges


Application Method:

Application carried out in accordance with a modified version of Belzona System Leaflet VPF-12.


Belzona Facts:

This application has provided protection on similar pipes for more than 10 years. The life of unprotected pipes was 3-5 years.


Photographs Description

  1. Preparation of flexible hoses in progress. All pipes are tightly wrapped with a polythene film to prevent bleed through of the pitch from the rubber component.
  2. The flanges are ground and coated with Belzona® 3921 GSC Conditioner.
  3. Application of Belzona® 3211 in progress. Belzona® 9311 Reinforcement cloth is incorporated into the 1st coat.
  4. Completed application.
Case study pic one


 Case study pic two


 Case study pic three


 Case study pic four


For more information about Belzona visit: