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    Injection Grouts and Crystalline Waterproofing

    This range covers injection grouts and crystalline waterproofing for concrete that leaks, cracks or stays under water pressure. The injection side includes single-component PU injection grout that reacts with water and expands to stop active seepage, plus two-component resins that seal and strengthen cracks in dry and water-bearing concrete. The crystalline waterproofing side includes powder, liquid and two-component coatings that grow crystals inside the concrete to block pores and capillaries in tanks, basements and sewage plants. Use the chooser below to match your job to the right product.

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    Injection grouts and resins compared

    ProductTypeUse it forGel or working time
    RAPIDSTRONG GROUT PUSingle-component water-reactive PU injection groutSoil and abutment stabilisation, basements, retaining walls, marine structuresGel time 36–48 seconds
    RAPIDSTRONG GROUT PFC 79Single-component water-reactive PU injection resin groutActive seepage zones, basements, retaining walls, MS columnsGel time 36–48 seconds
    RAPIDSTRONG GROUT VM 99Two-component solvent-free PU injection resinFine cracks, construction joints, rock and masonry sealingWorking time 25–30 seconds
    RAPIDSTRONG GROUT PCR 89Two-component water reactive injection resinStructural concrete cracks, foundations, tunnels, bridge structuresSee product page

    Crystalline waterproofing compared

    ProductTypeUse it forCoverage
    ROOFEXSingle-component crystalline powder mixed with waterWater tanks, basements, sewage plants, construction joints0.75 kg/m² per coat as two-coat slurry
    ROOFEX XLLiquid applied crystalline waterproofingConcrete roofs and terraces, basement walls, swimming poolsSee product page
    ROOFEX 2K 711Two-component crystalline waterproof coatingReservoirs, swimming pools, water tanks, basements, tunnels1.2–1.6 kg/m² for 2 coats
    ROOFEX COPCement-based crystalline and osmotic waterproof coatingPermanently submerged structures, salt water environments, basements0.75 kg/m² per coat as slurry
    RAPIDSTRONG EC 211Two-component crystalline elastomeric groutWater tanks, swimming pools, lift pits, below-grade wallsSee product page

    Showing 9 in Injection Grouts & Crystalline Waterproofing

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    Injection Grouts & Crystalline Waterproofing

    Water reactive PU grouts, cementitious and crystalline grouting systems

    9 Products
    1
    RAPIDSTRONG GROUT PU

    RAPIDSTRONG GROUT PU is an expansive, water-reactive, water-barrier polyurethane injection grout for free-flow pressure grouting. When it contacts water — including seawater and water containing slight acids or alkalies — it reacts quickly, expands into surrounding pores, cracks and narrow gaps, and polymerises within 36–48 seconds into a tough, highly adhesive solid. Non-toxic, non-pollutant, with no effect on potable water or marine life. Suitable for soil and abutment stabilisation, underground basements, retaining walls, rock areas, earth filling segments and structures exposed to waste water, industrial, chemical and sewage environments.

    2
    RAPIDSTRONG GROUT VM 99

    RAPIDSTRONG GROUT VM 99 is a high-performance, solvent-free, two-component polyurethane-based duromer injection resin for the structural sealing and strengthening of cracks, joints and cavities in both dry and water-bearing concrete structures. Mixed A+B at 1:1, it gels in 25–30 seconds and achieves >75 MPa compressive strength and 70 MPa flexural tensile strength — tested to DIN EN 196 T1. Capable of curing down to -20°C, with 1–12× volume expansion on water contact depending on ingress, and re-injectable through existing hoses for permanent capillary sealing. Suitable for pressure injection and gravity feed. Industrial use only.

    3
    RAPIDSTRONG EC 211

    Two components high strength Crystalline Blended Elastomeric water Barrier Grout. Complies with BS 1881.

    4
    ROOFEX

    ROOFEX is a high-performance penetrative crystalline waterproofing system. When applied to concrete, its active ingredients penetrate deep into the substrate and react with cement compounds and moisture — forming multiplied crystals that seal capillaries, pores and hairline cracks from within, transforming porous concrete into an impermeable mass. Effective against both positive and negative hydrostatic pressure. Four application methods: slurry coat, dry shake on fresh concrete, dry pack for joints and fillet sealing at construction joints. For water retaining structures, basements, effluent treatment and sewage plants.

    5
    RAPIDSTRONG GROUT PFC 79

    RAPIDSTRONG GROUT PFC 79 is a single-component, water-reactive polyurethane polymer injection resin grout. When it contacts water, it initiates a rapid polymerisation reaction — expanding into surrounding pores, cracks and narrow gaps within 36–48 seconds to form a tough, highly flexible solid that stops active water ingress. Non-toxic and non-flammable, it is designed for free-flow pressure injection to seal active leaks, strengthen ground, and protect MS columns and structures against corrosion in basements, retaining walls, underground structures and rock areas.

    6
    RAPIDSTRONG GROUT PCR 89

    High Performance Two Component water reactive Injection Resin for sealing and strengthening of dry and water bearing concrete structures. Multi-part composition provides deep penetration, tenacious crack bonding, and corrosion resistance in both dry and wet surface conditions.

    7
    ROOFEX XL

    Liquid applied High Performance Crystalline waterproofing system. Advanced liquid crystalline technology that penetrates deep into concrete and diffuses over time, reacting with cement material to fill airline cracks inside concrete with multiplied crystals. Makes porous concrete into a sound watertight substrate.

    8
    ROOFEX 2K 711

    ROOFEX 2K 711 is a high-performance two-component crystalline waterproof coating mixed at 1:2:0.2 (Liquid:Powder:Water). Its active ingredients penetrate concrete and react with cement and moisture to form multiplied crystals that seal capillaries, pores and cracks from within. Tested to multiple ASTM standards: 10–12 bar hydrostatic resistance, 51 MPa compressive strength, 1.65 MPa adhesion and 16% elongation. Flexible, self-healing, self-curing. Suitable for positive and negative waterproofing on concrete, brick and stone masonry. For reservoirs, swimming pools, water tanks, basements, tunnels and sewage treatment plants.

    9
    ROOFEX COP

    ROOFEX COP is a cement-based waterproof coating with crystallization and osmotic properties, conforming to ASTM C 1202 and DINV 18998. Applied by brush or spray, it penetrates into concrete and activates both crystalline crystal formation and osmotic action — sealing cracks up to 0.4mm, blocking capillaries and pores, and remaining 100% waterproof even in permanent immersion at high pressures. Resists salt water and atmospheric pollution. For negative and positive waterproofing of water retaining structures, basements, effluent treatment and sewage plants.

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