TOA 258-P Cement Membrane

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Technical Data

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TOA 258-P Cement Membrane is a two pack cement waterproofing cement based. Part A is modified polymer liquid and part B is a pre-mixed powder compounds of cement, selected fine aggregate and special additives. These two components, when mixed together, form a liquid mortar solution that is convenient for application on mortar and concrete surfaces to form a high elastic coating with waterproof and protective properties.

TOA 258-P Cement Membrane has the following outstanding features and benefits:

1. Packed in convenient mixing ratio for easy mixing and application.

2. Improved polymer composition increases good adhesion on surfaces.

3. Create a seamless waterproof membrane, no joints.

4. Capable of covering cracks ≤ 0.50mm.

5. The product is non-toxic and suitable for application on surfaces in contact with domestic water – compliant with the national technical regulation QCVN 01-1:2018/ BYT on the quality of clean water used for domestic purposes.

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Intended use:

TOA 258-P Cement Membrane is a professional waterproofing product used on concrete floors, walls, and plaster surfaces, both indoors and outdoors, with a protective layer. It is used in new construction and renovation projects such as:
- Waterproofing the interior surfaces of domestic water tanks, fire water tanks, swimming pools, water pits, etc., before plastering or tiling.
- Waterproofing floors and walls in bathrooms, kitchens, laundry areas, balconies, loggias, or other wet areas, etc., before tiling or stone tiling.
- Waterproofing for retaining walls, terraces, balconies, etc., with a protective plaster layer.

Adhesion strength under normal conditions after 28 days (MPa): ≥ 0.5
Adhesion strength after immerse in water (MPa): ≥ 0.5
Adhesion strength after heat ageing (MPa): ≥ 0.5
Crack bridging ability under standard condition (mm): ≥ 0.75
Water penetration under a water pressure of 1.5 bar for 7 days: Non-penetration.

Application tools: Mixer, trowel, brush, roller, or spray gun.
Mixing ratio: Mixing ratio of component A B = 1 2.6 by weight.
Tool cleaning: Clean all tools and equipment with clean water immediately after use. Hardened material should be cleaned mechanically.

Surface Preparation:

Plaster and concrete surfaces must be cleaned, ensuring they are free of dust, oil, grease, old paint, curing agents, or other contaminants. Absorbent surfaces must be completely saturated with clean water before application.
Pour ¾ of component A into a clean container, turn on the mixer at low speed, and gradually add component B. Mix thoroughly for 5 minutes until a homogeneous, lump-free mixture is obtained. Continue adding the remaining component A and continue stirring until homogeneous.

Application:

Use a trowel, brush, roller, or spray gun to apply the mixed mortar to the cleaned and thoroughly moistened surface.
For vertical walls, allow to dry for 6-8 hours before applying the next coat.
For horizontal surfaces, apply the next coat at least 8 hours later to ensure the previous coat is not affected.
Allow to dry completely for at least 7 days before application.
After application, a minimum curing period of 3-5 days is required, avoiding direct sunlight, high temperatures, strong winds, and frost to prevent rapid drying that could affect the quality of the waterproofing membrane.
Curing with nylon sheets, damp burlap sacks, or professional concrete curing agents approved by TOA is recommended.
Apply within an air temperature range of 5°C to 35°C and relative humidity below 80%.

TOA 258-P Cement Membrane

Intended use:

Technical Data

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