Blocking Agents

CRI-SIL Strand and Valley Water Block Sealants are designed to prevent water and other fluids from wicking up a finished cable construction. If there is a gap at the connector or a cut in the cable, moisture, water, or other fluids will be absorbed into the cable causing corrosion. This can lead to shorts, degradation of transmission, and other faults.

Strand and Valley Water Block Sealants

These materials can be applied to cables either manually or through pumping systems combined with static mixing tubes. Most products are designed to cure but will remain flexible as they fill all voids within the cable construction. With no air pockets inside the cable, it is effectively sealed from fluids and moisture. For those involved in cable connector assembly, these products can be removed with very little to no residue.

As always, if you don’t see what you are looking for, give us a call. Often times we can develop a material specifically for your needs.

Series Cable Blocking Compounds Datasheet
Overview of all cable blocking compounds Blocking Overview
Strand Sealant CST3144U is an un-catalyzed thixotropic liquid silicone rubber designed to be pumped onto wire strands, creating a fluid tight seal in your wire construction.  CST3144U
Strand Sealant CST3144B is a catalyzed thixotropic liquid silicone rubber designed to be pumped onto wire strands, creating a fluid tight seal in your wire construction. CST3144B
Valley Sealant CST2327A/B is a two-part RTV liquid silicone rubber mixed at a 1:1 ratio. It is designed to fill valley gaps in your cable construction. CST2327A/B is designed to be light weight which offers a reduced cable weight compared to other valley sealants. CST2327A/B is also available in lower viscosity or anti-poison versions. CST2327A/B
Valley Sealant CST2371A/B is a two-part RTV liquid silicone rubber mixed at a 1:1 ratio. It is designed to fill valley gaps in your cable construction. CST2371A/B is a higher gravity system that will offer increased cable crush strength and increased resistance to fluid penetration. CST2371A/B
Valley Sealant CST2177A/B is a two-part RTV liquid silicone rubber mixed at a 1:1 ratio. It is designed to fill valley gaps in your cable construction. CST2177A/B is designed to be light weight which offers a reduced cable weight compared to other valley sealants. CST2177A/B is also designed to withstand the high pressures of deep sea applications.  CST2177A/B