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HOME » MCT Transit Sealing System » The Engineering Secret: How “Peelable” Sealing Modules Cut Installation Costs by 50%

The Engineering Secret: How "Peelable" Sealing Modules Cut Installation Costs by 50%

--- 2025-12-16 14:09:54 --- Published by: TST Seal ---

sealing modules

[Hook] We’ve all been there: The cable schedule says 12mm, but the actual cable delivered to the site is 14mm. 

In traditional cable gland installations, this means stopping work, ordering new parts, and waiting. In the world of Modular Cable Transits (MCT), this is a non-issue.

Today, let’s dive into the “Peelable Layer Technology” (often called Multidiameter) — TST SEAL the game-changer that is saving shipyards and EPC contractors millions in inventory and labor costs.

    1. The “Onion” Concept: One Module, Infinite Fits At the heart of the system is the rubber sealing module. Unlike solid blocks, these modules consist of two halves with removable layers.

The Magic: By peeling off layers, you can adjust the inner diameter in 0.5mm – 1mm increments.

tst seal manual
tst seal manual

The Result: A single RM 40 module can seal a cable anywhere from 21.5mm to 34.5mm.

    1. How Does This Save 50% of Your Costs? 

 Inventory Reduction (The biggest win): Instead of stocking hundreds of specific cable glands (12mm, 14mm, 16mm…), you only need to stock 5-6 standard module sizes (RM 15, 20, 30, 40, 60). This simplifies your supply chain drastically.

 Faster Installation: Engineers don’t need to know the exact cable diameter during the design phase. Installers can adapt to the cable on-site instantly. No returns, no re-ordering.

 Future-Proofing (Spare Capacity): You can install “Blind Modules” (with the core in place) today, and use them for new cables next year. No drilling new holes. No welding. Just peel and seal.

    1. The Myth: “You Must Pay Premium Prices for This Tech” For a long time, European giants dominated this technology, charging a massive premium for the brand name. But materials science has evolved.

At [TST SEAL], we manufacture EPDM modules that are:

 Dimensionally Identical to standard S-Series frames/modules.

 Peelable with Precision (tested for perfect layer separation).

 Certified for IP68, Fire, and Explosion protection.

 Trusted by Global Leaders like GE, VOITH, and CRRC.

The Bottom Line: You don’t need to overpay for safety. If you are looking for a reliable, cost-effective alternative for your next project, let’s compare specs.

 Download our Cross-Reference Guide here: [Link to:https://sealmct.com/product/seal-module ]

 Question for Engineers: Do you prefer welding frames or bolting frames for your projects? Let me know in the EMAIL(:alixich@tstcables.com)

TST SEAL General Specifications

Product Series:Standard RM Modules (Multidiameter)

Module Depth:60 mm (Standard)

Material:EPDM Rubber (Halogen-free)

Protection Rating:IP68 / NEMA 4X

Technology:Peelable Layers (±1mm tolerance)

Standard Sealing Modules Range

Module Type

Cable Range (Ø mm)

Dimensions (HxW mm)

Weight (kg)

Cross-Ref (Compatible Type)

Recommended For

RM 15

0 + 3.0 – 11.0

15 x 15

0.02

RM 15

Data / Sensor Cables

RM 15w40

0 + 3.5 – 10.5

15 x 40

0.04

RM 15w40

Rectangular Packing

RM 20

0 + 4.0 – 14.5

20 x 20

0.04

RM 20

Standard Power Cables

RM 30

0 + 10.0 – 25.0

30 x 30

0.08

RM 30

Medium Power Cables

RM 40

0 + 21.5 – 34.5

40 x 40

0.14

RM 40

Thick Power Cables

RM 40 10-32

0 + 9.5 – 32.5

40 x 40

0.14

RM 40 10-32

Wide Range Variation

RM 60

0 + 28.0 – 54.0

60 x 60

0.32

RM 60

Main Feeder Cables

RM 90

0 + 48.0 – 71.0

90 x 90

0.65

RM 90

Heavy Duty Cables

RM 120

0 + 67.5 – 99.0

120 x 120

1.15

RM 120

Large Pipes / HV Cables

TST SEAL Solid / Spare Modules (Blind)

Module Type

Description

Dimensions (HxW mm)

Use Case

RM 20/0

Solid Core Module

20 x 20

Most Common Spare

RM 30/0

Solid Core Module

30 x 30

Spare Capacity

RM 40/0

Solid Core Module

40 x 40

Spare Capacity

RM 60/0

Solid Core Module

60 x 60

Spare Capacity

* Note: All solid modules can be used as spare capacity for future expansion.

Technical Performance

    • Temperature Range:-60°C to +80°C (Standard EPDM)
    • Fire Rating:E60 / EI60 / EI120 (Verified with installation)
    • Pressure Rating:Watertight > 4 bar; Gastight > 2.5 bar
    • Material Properties:Halogen-free, Low Smoke Index, UV Resistant

Free Sample | Customization Supported | Global Sales | Factory Direct Sales | Agents Welcome  (Email:alixich@tstcables.com)