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The Best Materials for Sealing Cable Entry Points


Protecting cable entry areas is essential for safety and system operations, but which material is best? Discover our cable entry sealing foam solutions that can suit multiple sealing requirements.

In providing integral thermal and acoustic retention and protection, cable entry seals are essential to the security and function of your electrical system, with the safety of any external disturbances and internal hazards. 

But what is the best material, size, and thickness for your cable entry seal requirements? 

Cable entry areas can become vulnerable, especially in buildings, as we expect them to retain water, restrict combustion and prevent fire spreading

Depending on the system, location and complexity, various options are available. Read on to discover the many cable entry seal solutions to find the best sealing for your needs. 

Protecting cable entry areas is essential but which material is best? Discover our cable entry sealing foam solutions that suit multiple sealing requirements.

12 Types of Cable Entry Sealing Foam Solutions

Due to cable entry seals expected to protect and insulate cables from external forces such as air, moisture, light and physical impact, we recommend foam as an ideal material which supports these requirements while being a highly compressible and versatile material.

Here we have listed 10 cable entry sealing foam solutions, with an additional blend and one sponge as the best performing and most reliable materials for your cable entry sealing needs:  

1. EPDM Foam

EPDM foam is an ideal outdoor cable-sealing foam solution due to having superior UV and ozone resistance properties. With a temperature range of -40°C – +120°C, EPDM foam also has excellent flexibility, tensile strength and recovery capabilities.

2. Foil Faced Foam

Foil-faced foam is more lightweight but still high-strength when compared to more chemically based foam materials. With high insulation properties, Foil-faced foam is an ideal cable entry foam solution to retain heat with slow temperature transfer capabilities.

Despite its lightness, foil-faced foam still provides an excellent barrier to gas, vapour, termites and vermin.

3. Neoprene Blend

With a temperature range between -40°C – +93°C, the neoprene blend is a suitable cable entry solution for multiple sealing solutions as a general, all-purpose cable entry seal. Neoprene blend has an excellent combination of UV, ozone, and oil resistance alongside high-performing physical properties.

4. Neoprene Foam

Neoprene foam is manufactured from high-quality closed-cell foam and suits general all-purpose specifications with water, ozone and weather resistance properties. But compared to neoprene blend, neoprene foam has a higher temperature range of -40°C – +120°C.

5. Nitto Foam

Nitto foam contains unique waterproofing capabilities with little compression alongside exceptional durability and weather resistance properties.

As a cable entry foam solution, Nitto foam boasts good acoustics and thermal insulation capabilities, with a temperature range of -40°C – +135°C. However, unlike other foams, the maximum thickness availability is less at 1mm – 25mm.

6. Polyamide Foam

Lightweight yet incredibly tough, polyamide foam is a strong and durable cable entry foam seal, withstanding temperatures ranging between -70°C – +205°C.

This excellent temperature range is the best on offer across cable entry foam solutions, alongside having excellent sealing properties and an NVH (Noise, vibration and harshness) solution. Therefore, polyamide foam makes an exceptional cable entry foam sealing material for extremely hot or cold conditions, while protecting cables in harsh, loud and abrasive environments.

7. Polyethylene Foam

A perfect foam for insulating cable entry, polyethylene foam provides low compression properties with impressive flexibility. Remarkably, this makes polyethylene foam capable of simultaneously bending and insulation.

With a temperature range between -70°C – +120°C, this unique foam solution is typically available in thicknesses between 1mm – 100mm.

8. Polyurethane Foam

Polyurethane foam is a robust cable entry seal solution, boasting excellent impact resistance and load-bearing capacity. The temperature ranges for this foam solution sit at a decent level between -40°C – +110°C.

However, in comparison to other foam materials, polyurethane has poor thermal capabilities and weather resistance.    

9. PVC Foam

PVC foam is an ideal cable entry solution due to its excellent compression required for acute sealing. With heightened resistance to air, moisture, dust and light, PVC foam can also conform to irregular surface textures.

With less of a temperature range than other foam sealing materials, PVC foam is water and corrosion-resistant. Plus, PVC has high impact resistance, durability and overall strength.  

10. Pyrosorb Foam

With good sealing properties against air, dust and water, pyrosorb foam represents a cost-effective open-cell solution, offering excellent flexibility and a standard temperature range between -40°C – +110°C.

As an open-cell foam material, pyrosorb foam is renowned for being a superior soundproofing foam material with fire-resistant and thermal insulation properties.

11. Silicone Sponge

Boasting an impressive temperature range between -60°C – +230°C, silicone sponge is another excellent sealing for cable entry requirements due to being a highly resilient and compressible material. A tight closed-cell structure enables silicone sponge to absorb moisture while maintaining impressive thermal and chemical stability.

However, you will find some thickness limitations compared to other foam materials, with most available only between 3mm – 25mm.

12. Superseal Foam

Hence the name, Superseal foam is an excellent cable entry foam solution for your sealing requirements. It has a standard temperature and thickness range of -40°C – +110°C and 3mm – 100mm.

Superseal foam has excellent sealing capabilities, limited water absorption and air permeability alongside low compression hardness properties.

Find Your Local Cable Entry Sealing Foam Products Provider

At Barton International, we stock an extensive range of cable entry foam materials, all offering high-performance sealing capabilities against air permeability, gasses, chemicals, and water ingress. 

With complete manufacturing process control, all our cable entry seal products can be custom-made across thicknesses and densities to best suit your sealing requirements. We also have various cable duct sealing solutions available. 

So, if you want to find out which cable entry foam sealing solution best suits your needs, get in touch today

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