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    Surface Treatment

    Megabond SBR Plus concentrated SBR latex bonding agent for damp and water contact areas by MATEX

    Megabond Sbr Plus

    Highly Concentrated SBR Latex Bonding Agent

    MEGABOND SBR PLUS is a high-performance Styrene-Butadiene copolymer latex bonding agent and admixture, designed for use in moisture-prone or water-contact environments. It enhances adhesion, water resistance, and durability in cementitious mortars, plasters, and concrete. With excellent dispersion, it improves mechanical strength and bonding to various substrates. Suitable for both interior and exterior use, MEGABOND SBR PLUS is highly effective as a primer on concrete floors or low-permeability surfaces. It can be used with concrete in potable water tanks, making it ideal for water tanks and damp areas. This multi-functional additive improves durability and workability across a wide range of construction applications.

    Technical data:
    • Appearance : Milky White Liquid
    • Application Temperature : 5°C to 40°C
    • Service Temperature : 5°C to 80°C
    • Application Ratio : Bonding Slurry (1:1:3)
    • Packaging : 20 liter jerry can, 200 liter drum
    Related Documents:

    How to Apply Megabond Sbr Plus

    Megabond SBR Plus is diluted with water and cement per the TDS dosage table and used as a bonding slurry or as an admixture for mortars, screeds and renders.

    1. Prepare the surface. Surfaces must be sound and free from laitance, oil and grease. Clean hard or deep contamination by mechanical scrubbing or grit blasting to fresh, clean concrete.
    2. Wet the substrate. Thoroughly wet the substrate and remove excess or standing water, which can affect adhesion. For concrete repair, remove damaged parts and protect reinforcement with Lavafer or Lavazinc EP.
    3. Mix. Add the diluted Megabond SBR Plus to the mixer first, then the cement and aggregate, and mix for a few minutes until homogeneous and lump free. Use the dosage table (by weight, product : water : cement : inert), e.g. 1:1:5:15 for screeds and patching mortars, 1:4:5.5:20 for plastering up to 10 mm.
    4. Apply bonding slurry. Mix Megabond SBR Plus with water and cement 1:1:3 by weight and apply as a bonding slurry between old and fresh concrete. Always apply the slurry just before pouring a screed and place the screed while the slurry is still fresh.
    5. Place screeds and renders. Apply screeds with a trowel and steel float to the desired thickness. For renders, mix with cement and 0-2 mm graded aggregates and apply by spray machine or trowel and steel float.
    6. Clean tools. Clean all tools with water before the product fully dries.

    Summary of the method in the Megabond Sbr Plus Technical Data Sheet. Always follow the full TDS on site.

    Standards & Test Methods

    StandardTitleReferenced for
    ASTM C1059Standard Specification for Latex Agents for Bonding Fresh To Hardened ConcreteType 2 latex bonding agent
    ASTM C1042Standard Test Method for Bond Strength of Latex Systems Used With Concrete By Slant ShearBond strength

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

    Frequently Asked Questions

    What is the mixing ratio for Megabond SBR Plus bonding slurry?

    Mix Megabond SBR Plus with water and cement at 1:1:3 by weight. The TDS dosage table also lists 1:1:2 (product : water : cement) for anchorage mortar.

    Can Megabond SBR Plus be used in potable water tanks?

    The TDS lists among its advantages that Megabond SBR Plus can be used with concrete in potable water tanks. No potable water test or approval is cited.

    What is the application temperature for Megabond SBR Plus?

    Substrate application temperature is +5°C to +40°C, and temperature resistance is +5°C to +80°C.

    What is the bond strength of Megabond SBR Plus?

    The TDS gives a bond strength above 8.6 N/mm (ASTM C1042). With screed it gives expected values of 2.0 N/mm² tensile bond strength.

    How is Megabond SBR Plus packaged and stored?

    It is supplied in 20 liter jerricans and 200 liter drums. Store between 10°C and 30°C away from direct sunlight; shelf life is 12 months in unopened original packing.

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