Skip to Content


For varying cable dimensions
At sea On land

There are eleven different sizes of AddBlock. By tearing off the wing-like inserts, which are of varying thickness, and inserting them in the main block it is possible to accommodate 66 different cable and pipe dimensions, from 3.5 mm (00.14”) to 69.5 mm (2.74”). The inserts are fitted with a locating ridge that fits exactly into furrows in the main block. These stop the block from ”telescoping".

  • AddBlock is available as both Ex and EMC.
Also available as:
Also available as:

Correct and safe installations

To achieve the highest standard of safety, a cable or pipe transit must be installed correctly. As there are many different types of frame – which may be either welded, bolted or glued into position – and insert block, it is essential that installers known when to use the most appropriate installation method.

For more information, please view following instructions, videos or download manuals as PDFs.

RGS Frame Horizontal
How to install a MCT Brattberg RGS/RGB frame, vertical

For more information visit Instructions and manuals

AddBlocks are all the same length as standard blocks, 60 mm (2.36”). The width of standard blocks (A measurement, see below) are 20, 30, 40, 60 or 90 mm, (00.79”), (1.18”), (1.57”), (2.36”), or (3.54”)

The AddBlock comes complete with inserts to give different block sizes.

Addblock Dimensions
Addblock Dimensions

The plug’s main purpose is to prepare coming installations by creating a spare block together with an AddBlock. Once the cable penetration is to be done, the plug is removed and the AddBlock is reused. 

In the table you see which plug, or combination of plug and wrap-around casing, to use when turning an AddBlock into a spare block.

Plugs And Wraps Table
Wraps And Plugs

Similar products


Standard Block

For a fast and safe installation

Designed to seal cables and pipes with diameters from 3.5 – 110 mm (0.14-4.33”). Other dimensions can be supplied to order.

See specs and variations  for Standard Block

E-Standard Block

For EMC and G&B capabilities

The E-Block has an integral copper sheet as discharging and shielding protection for protection against EMI, EMP and ESD

See specs and variations  for E-Standard Block


For great flexibility

Newly developed. Provides greater flexibility, simple and safe installation.

See specs and variations  for Handiblock


For varying cable dimensions and EMC and G&B capabilities

Available in eleven block sizes and 66 cable dimensions with protection against EMI, EMP and ESD

See specs and variations  for E-Addblock