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    Waterproofing

    Hydrocryl 450 high build flexible acrylic waterproofing membrane by MATEX, 20 kg pail

    Hydrocryl 450

    High Quality Flexible Acrylic Based Waterproofing Membrane

    HYDROCRYL 450 is a high-build, elastomeric, single-component liquid applied waterproofing membrane based on advanced acrylic resins, offering excellent elasticity, durability, and adhesion to most substrates. Designed for horizontal and vertical surfaces, it resists ultraviolet rays and forms a semi-gloss, water-based, low-odor, and environmentally friendly coating. HYDROCRYL 450 reduces heating through its reflective features and can be manufactured in custom colors. Highly elastomeric with superior crack-bridging capabilities, it provides long-lasting protection against chloride and sulphate ions, making it ideal for roofs, hangars, factories, stores, and malls in harsh climatic conditions.

    Technical data:
    • Color : grey or white liquid
    • Touch dry : 8 hours
    • Service Temperature : 5 to 75°C
    • Application rate : 1.3 kg/m²/coat (500 micron)
    • Coverage : One pack covers approx. 15 m² per coat @ 500 micron thickness
    • Packaging : 20 kg plastic pail
    Related Documents:

    How to Apply Hydrocryl 450

    Hydrocryl 450 is a ready-to-use single-component membrane for horizontal and vertical surfaces, applied in a minimum of two coats.

    1. Prepare the surface. All surfaces must be sound, clean, dry and free from loose material, efflorescence, laitance, curing compounds, dirt, oil and grease. Concrete surfaces must be totally cured.
    2. Check the substrate type. Bituminous roof membranes must be clean, free of de-bonding blisters and at least 4-6 months old. PU foam must be clean and free of shaving residue, and steel must be cleaned mechanically or by blasting.
    3. Mix. Shake the closed pail, or mix slowly for 3-5 minutes until homogeneous.
    4. Apply the first coat. Apply by roller, trowel, brush or spray at 1.3 kg/m² per coat (500 micron). On porous substrates or in very hot climates, dilute the first coat with 20% water.
    5. Embed reinforcement. For improved strength and flexibility, embed a 65 g/m² non-woven geotextile into the wet first coat, including at corner joints, fillets and pipe penetrations. Where movement and foot traffic are expected, embed a fiberglass mesh in the fresh first coat.
    6. Apply the second coat. Apply subsequent coats at the same rate, preferably at 90 degrees to the first. A minimum of two coats at 500 microns DFT each is required.
    7. Cure and protect. Allow 7 days for the coating to reach full properties. Avoid ponding water for a minimum of 72 hours after application.
    8. Clean tools. Clean tools with water before the product hardens. Hardened material can only be removed mechanically.

    Summary of the method in the Hydrocryl 450 Technical Data Sheet. Always follow the full TDS on site.

    Standards & Test Methods

    StandardTitleReferenced for
    ASTM D2240Standard Test Method for Rubber Property—Durometer HardnessShore A hardness (50)
    ASTM D412Standard Test Methods for Vulcanized Rubber and Thermoplastic Elastomers—TensionTensile strength (1.2 N/mm²) and elongation (>500%)
    BS EN 12390Testing hardened concreteWater penetration (nil)
    DIN 1048Testing methods for concrete (Prüfverfahren für Beton)Resistance to hydrostatic pressure (>1.5 bar)
    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
    ASTM C1305Standard Test Method for Crack Bridging Ability of Liquid-Applied Waterproofing MembraneListed in the TDS

    Standards and test methods as referenced in the Hydrocryl 450 Technical Data Sheet. Values in the TDS are typical laboratory results under standard conditions.

    Frequently Asked Questions

    Where can Hydrocryl 450 be used?

    Hydrocryl 450 is used for external waterproofing of roofs, hangars and factories on floors and walls, as a reflective layer on metal sheds, under ceramic coverings in showers and bathrooms, as a top coat over PU foam roofing and EIFS, and on cold stores.

    What is the application rate of Hydrocryl 450?

    Apply at 1.3 kg/m² per coat (500 micron), with a minimum of two coats. Coverage varies with site conditions.

    What is the service temperature of Hydrocryl 450?

    The service temperature is +5°C to +75°C. It is touch dry in 8 hours and reaches full properties after 7 days.

    What chemicals is Hydrocryl 450 resistant to?

    The TDS lists resistance to diluted acid, petrol, alkali and oil, and good resistance to chloride and sulphate ions. It should not be subjected to permanent water immersion.

    What is the shelf life and packaging of Hydrocryl 450?

    It is supplied in 20 kg plastic pails and has a shelf life of up to 12 months when stored in a covered, cool, dry place away from direct sunlight, heat and high humidity.

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