Densoseal 16A is a self-supporting non-setting mastic which has been developed for sealing cable ducts and conduits against gas or water.

Unaffected by natural gas and water
Accommodates movement
Adheres to wet surfaces
Withstands at least 20kPa (2-meter head) water pressure for a minimum of 30 minutes


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Densoseal 16A is packed into the ends of the duct by hand and molded firmly around cables and against the duct ensuring there are no gaps or fissures
The mastic should be packed to a depth at least equal to the diameter of the duct
Surfaces should be free from loose rust, scale, dirt or previous sealants
Adheres to glazed earthenware, steel and plasticized materials such as lead, polythene or PVC

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