MATEX
Contact Us
Contact MATEX
Open menu
Quick Contact
X

    Navigation
    Close menu
    Theme Color
    Light Dark

    Waterproofing

    Hydrocem 1K single component cementitious waterproofing slurry by MATEX, 25 kg bag

    Hydrocem 1k

    Single Component Cementitious Waterproofing Slurry

    HYDROCEM 1K is a flexible, single-component cementitious waterproofing slurry designed for both internal and external applications. It forms a durable, highly bonded waterproofing layer that withstands positive water pressure up to 1.5 bars. Ideal for negative and positive waterproofing requirements, HYDROCEM 1K offers excellent mechanical strength, abrasion resistance, and chemical durability. It adheres strongly to concrete and masonry surfaces and can be applied easily over damp substrates. Once cured, it creates a flexible, seamless layer compatible with various coatings, tile adhesives, and toppings. HYDROCEM 1K provides a low-maintenance, long-lasting waterproofing solution for a wide range of building projects.

    Technical data:
    • Color/Appearance : cement grey or white powder
    • Workable time : 45 minutes @ 25°C
    • Service Temperature : -5°C to 80°C
    • Recoating interval : 4-8 hours
    • Coverage : 7-7.5 m² per bag @ 2mm thickness
    • Packaging : 25 kg bag
    Related Documents:

    How to Apply Hydrocem 1k

    Hydrocem 1K is mixed with water on site and applied in two coats, green on green, by trowel, brush or spray machine.

    1. Prepare the substrate. Surfaces must be sound, clean and free from loose material, efflorescence, laitance, curing compounds, dirt, oil and grease. Concrete must be cured for at least 14 days. Remove hard laitance by mechanical methods such as captive blasting or sand blasting, or with hand mechanical tools and wire brush discs where access is restricted.
    2. Form fillets and treat cracks. Create a 45° fillet at wall-floor junctions with Lavarep F40 or Lavarep F60. Fill superficial cracks with a cementitious repair mortar, or a paste of Hydrocem 1K for dynamic superficial cracks; fill dynamic cracks that penetrate the concrete with flexible injection resins. Plug concentrated water seepage with Hydroplug.
    3. Pre-wet the surface. Saturate the substrate with clean water until a saturated surface dry (SSD) condition is reached, to prevent water absorption and allow proper adhesion and curing.
    4. Mix. Pour 6.25 to 6.5 liters of water into a clean vessel and add the 25 kg bag. Mix with a slow speed mixer (300-400 rpm) for 3 to 5 minutes until homogeneous and lump free, rest 3 minutes to release entrapped air, then remix briefly. Mix only what can be used within 30 minutes and stir frequently.
    5. Apply the first coat. Brush on the first coat at a spread rate of 1.9 kg/m². If using fiber mesh reinforcement, embed it in the first coat while still wet.
    6. Apply the second coat. Within 5 to 8 hours, depending on weather, apply the second coat green on green, perpendicular to the first, at the same rate. A total of 3.8 kg/m² gives a 2.00 mm dry film; for water under pressure, apply a third coat.
    7. Clean tools. Clean tools with water before the product hardens. Hardened material can only be removed mechanically.

    Summary of the method in the Hydrocem 1k 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—TensionTensile strength 3.25 N/mm²
    EN 1504-9Products and systems for the protection and repair of concrete structures — General principles for the use of products and systemsListed in the TDS
    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 1062Paints and varnishes — Coating materials and coating systems for exterior masonry and concreteListed in the TDS
    EN ISO 7783Paints and varnishes — Determination of water-vapour transmission properties — Cup methodListed in the TDS
    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 waterListed 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 1k Technical Data Sheet. Values in the TDS are typical laboratory results under standard conditions.

    Frequently Asked Questions

    How much water pressure can Hydrocem 1K withstand?

    When cured, Hydrocem 1K can withstand positive water pressure up to 1.50 bars and passed resistance to 1.50 bar pressure per BS EN 12390-8. It is suitable for both negative and positive side waterproofing.

    What is the coverage of Hydrocem 1K?

    The TDS states 7.0-7.5 square meters per 25 kg bag at 2.00 mm thickness. The application section specifies 1.9 kg/m² per coat, with two coats (3.8 kg/m²) giving a 2.00 mm dry film.

    How many coats of Hydrocem 1K are needed?

    Two coats are generally recommended, the second applied green on green within 5 to 8 hours and perpendicular to the first. A third coat is recommended where the membrane will face water under pressure.

    What is the pot life of Hydrocem 1K?

    Workable time after mixing is 45 minutes at 25°C. The TDS advises mixing only as much as can be used within 30 minutes and stirring frequently.

    Where can Hydrocem 1K be used?

    Uses listed in the TDS include swimming pools and water reservoirs before tiling, water tanks and concrete pipes, facade damp proofing, vapor barrier under cladding, shafts, basements, foundations, bathrooms, kitchens and lift pits.

    Quick Contact