MATEX
Contact Us
Contact MATEX
Open menu
Quick Contact
X

    Navigation
    Close menu
    Theme Color
    Light Dark

    Waterproofing

    Hydrocem 2K two part elastomeric cementitious waterproofing coating kit by MATEX

    Hydrocem 2k

    Two Part Elastomeric Cementitious Waterproofing Coating

    HYDROCEM 2K is a two-component, acrylic-modified flexible cementitious waterproofing coating, specially designed for protecting water-retaining structures. It consists of selected cements, bonding agents, fillers, and a water-based synthetic acrylic co-polymer. When mixed, HYDROCEM 2K forms a workable slurry that adheres strongly to concrete and masonry surfaces, applied horizontally or vertically. Once cured, it creates a durable, flexible waterproof layer resistant to chloride and sulphate attacks. It offers excellent chemical resistance, UV durability, crack-bridging ability, and is safe for contact with potable water, making it ideal for demanding environments.

    Technical data:
    • Appearance : Comp.A: grey or white powder, Comp. B: white liquid
    • Workable time : >40 minutes @ 25°C
    • Application Temperature : 5°C to 35°C
    • Service Temperature : -5°C to 80°C
    • Drying time : 8 hours
    • Recoating interval : 4-8 hours
    • Coverage : 8.5 – 9.0 m² per bag @ 2mm thickness
    • Packaging : 30 kg kit
    Related Documents:

    How to Apply Hydrocem 2k

    Hydrocem 2K is a pre-measured two-component kit mixed on site and brushed on in at least two coats.

    1. Prepare the substrate. Surfaces must be sound, clean and free from loose material, efflorescence, laitance, curing compounds, dirt, oil and grease, and concrete must be cured for at least 14 days. Level and smooth the surface, remove hard laitance by captive or sand blasting, repair degraded concrete, and treat exposed reinforcement with Lavafer.
    2. Form fillets and treat cracks. Create a 45° fillet at wall-floor junctions with Lavarep F40 or Lavarep F60. Fill superficial cracks with cementitious repair mortar or a paste of Hydrocem 2K, fill dynamic penetrating cracks with flexible injection resins, and plug concentrated seepage with Hydroplug.
    3. Pre-wet the surface. Saturate the substrate with clean water until a saturated surface dry (SSD) condition is reached.
    4. Mix. Pour the liquid (part B) into the container and slowly add the powder (part A). Mix with a low-speed mixer (300-400 rpm) and paddle for 3-5 minutes until homogeneous and lump free, then leave for 4 minutes to release entrapped air.
    5. Treat joints in tanks and pools. For internal waterproofing of water tanks and swimming pools, fix Hydrojoint Tape at joints and penetrations. Brush a strip of Hydrocem 2K 75 mm wider than the tape on both sides, embed the tape with a steel spatula, and let the strip dry.
    6. Apply the coats. Brush on at least two coats in opposite directions, no more than 1 mm per coat, letting the first harden sufficiently before the second. A build-up of 3.4 kg/m² gives a 2.00 mm membrane. Where movement or cracking is expected, embed reinforcing fiber mesh in the first coat while wet and fully cover it with the second.
    7. Protect and cure. Protect from rain and water spillage for the first 24 hours. In peak summer heat, shade the work area. In drinking water tanks, wash and sponge-scrub the coating thoroughly with water before use.
    8. Clean tools. Clean all tools with water before the product hardens. Hardened material can only be removed mechanically.

    Summary of the method in the Hydrocem 2k Technical Data Sheet. Always follow the full TDS on site.

    Standards & Test Methods

    StandardTitleReferenced for
    ASTM D412Standard Test Methods for Vulcanized Rubber and Thermoplastic Elastomers—TensionElongation up to 20% (unbonded); tensile strength >1.0 N/mm²
    ASTM D2240Standard Test Method for Rubber Property—Durometer HardnessShore A hardness 60
    BS 6920Suitability of non-metallic materials and products for use in contact with water intended for human consumption with regard to their effect on the quality of the waterToxicity: non-toxic
    EN 14891Liquid applied water impermeable products for use beneath ceramic tiling bonded with adhesives — Requirements, test methods, assessment and verification of constancy of performance, classification and markingListed in the TDS
    EN 1504-2Products and systems for the protection and repair of concrete structures — Surface protection systems for concreteListed in the TDS
    ASTM C836Standard Specification for High Solids Content, Cold Liquid-Applied Elastomeric Waterproofing Membrane for Use with Separate Wearing CourseListed in the TDS
    ASTM E96Standard Test Methods for Water Vapor Transmission of MaterialsListed in the TDS

    Standards and test methods as referenced in the Hydrocem 2k Technical Data Sheet. Values in the TDS are typical laboratory results under standard conditions.

    Frequently Asked Questions

    Is Hydrocem 2K suitable for drinking water tanks?

    The TDS describes it as non-toxic and suitable for drinking water, with a non-toxic result under BS 6920. Before using a drinking water tank, wash the applied coat thoroughly with plenty of water while scrubbing with a sponge.

    What is the coverage of Hydrocem 2K?

    Approximately 8.5-9.0 square meters per 30 kg kit at 2.0 mm thickness. A build-up of 3.4 kg/m² gives a 2.00 mm membrane.

    What water pressure can Hydrocem 2K withstand?

    It is rated for positive side water pressure up to 5 bar, tested per BS EN 12390 part 8.

    What are the application and service temperatures for Hydrocem 2K?

    Apply between +5°C and +35°C. Service temperature is -5°C to +80°C.

    How many coats of Hydrocem 2K are required and how thick?

    At least two coats, applied in opposite directions, with no more than 1 mm per coat. The recoating interval is 4-8 hours and drying time is 8 hours.

    Quick Contact