Insert blocks

MCT Brattberg’s insert blocks are manufactured from Lycron, a synthetic halogen-free polymer containing a lubricant that was specially developed according to our specifications to withstand fire, explosions, temperature variation, ageing, radiation and pests. The blocks are injection moulded to give precision components with a high degree of accuracy.

Block types

• Standard blocks are available for cable diameters from 4-112 mm. Other dimensions can be supplied to order.
• Spare blocks (solid with no channels) are used to fill in the spaces between standard blocks gripping cables.
• Our AddBlocks and can be adapted to five different cable dimensions.
• U-blocks can be used to increase the outside dimensions of blocks to the next module size.  

It is important to note that in a fire, our Lycron rubber insert blocks expand by approximately 15%, thus compensating for cable insulation that has burnt away or melted. This expansion also causes tighter sealing of cables and pipes.