Maxbond 323C

Maxbond 323C: Single Component Polyurethane Membrane

Product Overview

Description: Maxbond 323C is a high-performance single-component, cold-applied membrane derived from pure polyurethane, with no bitumen or coal tar modification. The cured membrane is characterized by its exceptional flexibility, high tensile and tear strength, and excellent adhesion to various surfaces including concrete, masonry, bricks, UPVC, plywood, and metal.

Design Features

1. Liquid-Applied System:
   • Simple surface preparation and easy application procedure.
   • Offers practical quality control under site conditions.
2. Seamless Waterproof Membrane:
   • Forms a homogeneous waterproof membrane without seams or lapping.
   • Ensures a continuous and effective barrier against water ingress.
3. Elasticity and Substrate Movement:
   • Exhibits excellent elasticity, accommodating moderate substrate movement.
4. Fully Bonds to Substrate:
   • Forms a strong bond with the substrate.
   • Does not permit water migration in case of puncture, allowing for easy repair to localize the affected area.
5. Resistance to Dirt and Chemicals:
   • Resistant to dirt accumulation and mild chemicals.
   • Maintains durability in challenging environments.
6. High Solid Content and Low VOC:
   • High solid content of more than 93%.
   • Low VOC (volatile organic compound) of less than 100g/L.

Performance Data and Recommended Areas

Recommended Areas:

• Concrete roof in a concealed system.
• Landscape and planter boxes.
• Balconies and courtyards.
• Basement slabs and retaining walls.

Performance Data (Test Standard Value):

• Solids Content: 90%
• Density (ASTM D-1475): > 1.48 Kg/L
• Tensile Strength (ASTM D-412): > 1.4 N/mm²
• Elongation @ Break (ASTM D-412): > 500%
• Adhesion Strength (ASTM D-7234): > 1.1 N/mm²
• Water Vapour Transmission (ASTM E-96): 12 g/m².24hr
• Shore A Hardness (ASTM D-2240): 45
• Touch Dry (ASTM D-1640): 4 Hours

Surface Preparation

1. Substrate Conditions:
   • Fully cured, sound, clean, and dry.
   • Remove cement laitance, mildew, oil, grease, asphalt, sealer, loose material, and foreign substances.
2. Preparation Steps:
   • Flush downpipe openings to allow water flow.
   • Level honeycombs, voids, and cracks above 2mm with non-shrink repair mortar.
   • Sand rough surfaces and eliminate sharp protrusions.

Installation Procedure

1. Mixing:
   • Stir with an electrical mixer for 1 minute before use.
   • In closed head pails, cut open the entire top to mix contents.
2. Application:
   • Apply Maxbond 323C with a paint roller or brush at 0.9kg per m² to achieve a 0.7mm wet thickness.
   • Allow the coating to become touch-dry and proceed to apply the second coat at the same rate and thickness.
3. Water Ponding Test:
   • Water ponding test or protection topping may proceed 24 hours after the last membrane application.

Packaging and Coverage

• Packaging: 22 kg closed head metal pail
• Coverage: Approximately 0.9 kg per m² for a 0.7mm thick coat

Storage & Shelf Life

• Prevent prolonged exposure under direct sunlight.
• 12 months shelf life when stored in a cool and dry space.

Health & Safety

• Maxbond 323C contains solvents and is harmful to eyes and skin.
• Use protective clothing, rubber gloves, and a mask during application with adequate ventilation.

Important Note

• Information provided is in good faith and based on current knowledge and experience.
• No liability is assumed, expressed, or implied, for any particular use and/or application.
• Effective from the date of issue, superseding all previous editions.
• Values are typical and not meant as performance benchmarks.