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    ​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​MasterRoc TSG 800 - New Fire-Resistant Tail Sealant​​

    ​​​​​​​​​​​​​​​​​​​​​​​How does MasterRoc TSG 800 work?

    Mas​terRoc TSG 800 is a new fire-resistant and sustainable tail sealant for the protection of the wire brushes in shielded tunnel boring machines (TBMs). It efficiently seals the gap between the shield tail and the concrete segments that prevents the ingress of water, annulus grout and soil into the tunnel area behind the TBM.

    What are the unique features of MasterRoc TSG 800?

    MasterRoc TSG 800 sealant is formulated to resist water and ground pressure and will not break down under high mechanical stress. It has excellent pumping properties to cope with the high TBM production rates and adheres to all types of surfaces. The lower density product helps customers to reduce consumption, resulting in significant material and cost savings.​

    What are the benefits of MasterRoc TSG 800?

    MasterRoc TSG 800 is suitable for tunneling with shielded TBMs equipped with a tail seal brush system and is also compatible with all other tail sealants available on the market.

    Operational Benefits:
    • Reduced material consumption and costs 
    • Excellent pumping properties and cohesion for a faster construction process
    • Compatible with any gaskets, metals, and concrete surfaces
    • Distributes perfectly in the chambers between the rows of brushes to ensure a proper seal
    • Biodegradable and eco-friendly

    Technical Benefits:
    • Fire-resistant, no propagation of flames when exposed to sparks or direct flames resulting in increased work safety
    • Excellent consistency and sealing properties 
    • Very high washout resistance 
    • Non-miscible with annulus grout


    If ​you have further​​​​ questions, feel free to contact us:

    Mike Sposetti

    Global Technical Manager TBM

    Would you like to receive more information?

    Please fill in the form, we will contact you soon.