Product Details

1. Surface Preparation (Crucial Step)

The integrity of the waterproofing depends entirely on preparation.

• General: All surfaces must be smooth, clean, dry, and free of dust, oil, rust, and laitance.

• Concrete: Must be at least 28 days old and well-dried. Uncured concrete releases gas when heated, causing blistering/delamination.

• Metal: Wire brush to remove moss, loose paint, and rust.

• Terrazo Tiles: Repair damaged joints and ensure tiles are firmly grouted.

• Asphalt/Felt: Cut blisters crosswise, dry, and re-bond with adhesive.

2. Priming Instructions

• Concrete, Terrazo, & General Surfaces:

  • Dilute BITUMAT Synroof Hi Build with 20% water.

  • Warning: Do not dilute more than 20%, or bonding strength will decrease.

• Metal Roofs:

  • Apply a rust-inhibitive primer.

  • Apply metal primer to corroded surfaces.

• Algae/Fungal Areas:

  • Clean with a stiff-bristled broom.

  • Treat with a fungicide.

  • Apply primer (Synroof diluted 20% with water).

3. Application Procedure

• Condition: Ensure the primer is completely dry before starting.

• Method:

  • Apply in separate coats.

  • Apply each coat at a right angle to the previous one (cross-layering).

  • Tip: Use a different color for each coat to ensure consistent coverage.

• Coverage/Thickness:

  • Apply 2 coats at approximately 0.8 Kg/sqm per coat (excluding primer).

  • Target Dry Film Thickness (DFT): 0.5mm to 1.5mm.

• Reinforcement (Sandwich System):

  • Recommended for areas anticipating structural movement, pipes, drains, and upstands.

  • Embed a 60/80 gsm thermo-bonded polyester mesh into the wet first coat.

4. Curing Time

• Between Coats: Allow 24 hours.

• Final Cure: 48 hours at normal temperatures.

• Note: Do not lay insulation or protection until fully cured.

5. Mechanical Protection (Post-Waterproofing)

• Accessible Roofs (Walkable):

  1. Non-woven polyester separation layer.

  2. Thermal insulation boards.

  3. Kraft paper or Polyethylene sheet.

  4. Concrete screed (4-5cm) or cement tiles.

• Non-Accessible Roofs:

  1. Non-woven polyester separation layer.

  2. Insulation boards.

  3. Second separation layer.

  4. Washed gravel (min depth 5cm).

6. Storage & Cleanup

• Cleanup: Flush all tools and hoses with water immediately after use.

• Storage: Keep away from direct sunlight. Store between +5°C and 30°C. Protect from frost.

• Shelf Life: Minimum 1 year in unopened containers.

• Packaging: 20 Kg Metal Pails

7. Application Equipment

This coating is versatile and can be applied using the following methods depending on site conditions:

• Brush

• Roller

• Squeegee

• Spray Equipment: If spraying, ensure equipment suitability prior to use. A nozzle size of at least 0.028 inch is required to handle the material viscosity.

8. Application Procedure

• Technique: Apply the material in separate coats. Each subsequent coat should be applied at a right angle (90°) to the previous coat (cross-hatch method) to ensure complete sealing.

• Visual Guide: It is recommended to use a different color for each coat. This provides a visual indicator to ensure consistent coverage and helps prevent missed spots.

9. Coverage and Thickness

• Coverage Rate: Consumption varies based on the type of substrate, surface regularity (roughness), and the application method used.

• Dry Film Thickness (DFT): The final thickness should be determined by the specific requirements of the roof. The system is designed to build up a final dry film thickness between 0.5 mm and 1.5 mm.