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    MasterSeal 583

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    MasterSeal 583 (formerly known as Super Thoroseal) is a high-performance, cement-based waterproofing coating designed for use on concrete and masonry surfaces. Manufactured by Master Builders Solutions, this product is widely utilized in both residential and commercial applications to prevent water infiltration and protect structural integrity.

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    Product Overview

    • Composition: A dry, polymer-modified Portland cement-based coating.

    • Application Method: Mixed with clean water to form a slurry, then applied using a stiff brush, broom, or spray equipment.

    • Coverage: Typically applied in two coats, each with a minimum thickness of 2 mm.

    • Finish: Provides a semi-smooth, white decorative finish.


    Key Features & Benefits

    • Waterproofing: Effectively seals and protects against water, dampness, and seepage.

    • Hydrostatic Pressure Resistance: Resists both positive and negative hydrostatic pressure, making it suitable for below-grade applications.

    • Vapor Permeability: Allows water vapor to pass through, reducing the risk of trapped moisture and mold growth.

    • Durability: Offers excellent adhesion, flexural strength, and freeze/thaw resistance. steel

    • Ease of Use: Solvent-free and easy to apply; cleanup requires only water.

    Recommended Applications

    • Basements and Foundations: Ideal for waterproofing below-grade structures to prevent water ingress.

    • Water Reservoirs and Cisterns: Safe for use in potable water applications.

    • Tunnels and Subterranean Structures: Provides reliable waterproofing in underground environments.

    • Bathrooms and Showers: Suitable for waterproofing walls and floors before applying decorative finishes.

    Application Guidelines

    • Surface Preparation: Substrates must be clean, structurally sound, and mechanically keyed. Remove all coatings, defective renders, foreign matter, formwork treatments, and contaminants that may hinder adhesion.

    • Mixing: Blend the powder into clean water using a slow-speed drill (400–600 rpm) with a suitable mixing paddle until a thick, lump-free consistency is achieved. Allow the mixture to stand for 5–10 minutes for full saturation, then re-mix and add a small amount of water if necessary to restore consistency. 

    • Application Conditions: Do not apply when the ambient or substrate temperature is below 5°C or may fall below 5°C within 24 hours after application. 

    For more detailed technical information, including safety data sheets and application guides, please refer to the official Master Builders Solutions product page:

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    MasterSeal 583

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