Sealing & Waterproofing of Cable Ducts Using Densoseal 16A | Thames Water Project
Published 08 Feb 2021

Densoseal 16A To Seal Cable Ducts At The Thames Water Site in Watford
Densoseal 16A
Sealing & Waterproofing of Cable Ducts
Thames Water Project
Flood Control International of Tavistock, Devon, completed a project at a Thames Water site in Watford consisting of sealing cable entries with Winn & Coales’ Densoseal 16A™. There will be further Thames Water sites to follow in a major refurbishment of their sites resulting from a Flood Prevention report.

Densoseal 16A
Densoseal 16AÂ is a non-setting, self-supporting mastic which may be applied to wet surfaces and will seal ducts and conduits against ingress of water and gas – suitable for CHP and biogas projects. It complies with British Telecom Specification M212C. It is suitable for sealing cable ducts, conduits and service entry pipes or sleeves, particularly below ground level, to prevent entry of water or gas into buildings. It may also be used for profiling mechanical joints on hot pipes to allow application of tapes.
Location | Watford, U.K. |
Client | Thames Water |
Contractor | Flood Control International |
Product | Densoseal 16A™ |
Date | September 2017 |

Densoseal 16A – Self-supporting & Non-setting Mastic for Sealing Cable Entries & Ducts
About Denso
Denso North America Inc. is a subsidiary of Winn & Coales International, a leading manufacturer of anti-corrosion coatings that include Protal liquid epoxies, Denso petrolatum tapes, mastics, primers, bitumen tapes, butyl tapes, hot applied tapes, and a full line of marine pile protection systems. Winn & Coales was originally established as a business in London, England, in 1883, and the first petrolatum tape manufactured in the UK was Denso tape, manufactured under license by Winn & Coales (Denso) Limited.
Denso tape was developed over 80 years ago for the “Long Life Protection” of buried steel pipelines against corrosion. The Denso SeaShield Marine Systems include fiberglass forms, epoxy grouts, underwater epoxies, injectable epoxies, petrolatum tape and wrap systems.
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