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    ​​MasterRoc® SLF 419​

    Biodegradable, highly stable soil conditioning foam for Tunnel Boring Machines

    MasterRoc®​ SLF 419 is a high-performance foaming agent, specifically designed to improve the performance and control of the soil through the screw conveyor under the toughest conditions. MasterRoc SLF 419 foaming agent is produced from biodegradable raw ​materials.

    Recommended uses: 

    MasterRoc SLF 419 foaming agent is designed to treat silty and sandy soils. The main application is in the TBM soft ground tunneling. MasterRoc SLF 419 foaming agent creates a highly stable fine foam to hold the face pressure and maintain the rheology of the excavated ground longer than the conventional foaming agents.

    What are the unique features of MasterRoc SLF 419?

    • Generates fine, uniform, and stable foam bubbles
    • Improves soil behavior and reduces soil permeability
    • Creates plastic deformation properties in the soil
    • Lowers inner friction and abrasiveness of the soil at the cutterhead
    • Reduces stickiness of certain soils​

    ​What are the benefits of MasterRoc​ SLF 419?​

    • ​Provides controlled support pressures
    • Increases face stability
    • Reduces risk of surface settlement
    • Reduces soil blockage and promotes easier ‘mucking’


    Direct contact

    Master Builders Solutions Technical Support

    Admixture Systems

    1-800-628-9990

    Product Certifications

    Generate a free certificate of conformance for a specific Master Builders Solutions construction product.

    Related Literature

    MasterRoc SLF 419 Data Guide

    pdf (202.15 Kb)