CASTECHSEAL PU 40
One-Component Moisture-Curing Polyurethane Joint Sealant
CASTECH Seal PU 40 is a one-component, moisture-curing polyurethane sealant with good sealing and flexible performance. It causes no corrosion or pollution to base materials, is environmentally friendly, puncture resistant and easy to repair, and bonds well with cement and stone.
Overview
About
CASTECH Seal PU 40 is a one-component, moisture-curing polyurethane sealant with good sealing and flexible performance. It causes no corrosion or pollution to base materials, is environmentally friendly, puncture resistant and easy to repair, and bonds well with cement and stone.
Typical uses
Suitable where low movement and high resistance to
penetration and pressure are required
- Waterproof sealing of the back-water face of bridges and tunnels
- Drainage pipes and other waterproof structures
- Precast panels, internal concrete walls, and stone bonding and sealing
Benefits
Advantages
Key advantages
- One-component
- Excellent extrusion
- Non-sag
- Easy construction
- High modulus
Technical data
| Appearance | Black, grey, white homogeneous paste |
|---|---|
| Density | 1.45 g/ml (req. 1.45 ± 0.1) |
| Extrudability | 440 ml/min (req. ≥ 80) |
| Sagging | 0 mm (req. ≤ 3) |
| Tack-Free Time | 1 h (req. ≤ 24) |
| Curing Speed | 2.6 mm/d (req. ≥ 2.0) |
| Volatile Content | 2% (req. ≤ 7) |
| Shore A Hardness | 46 (req. 40 – 50) |
| Tensile Strength | 2.5 MPa (req. ≥ 1.5) |
| Elongation at Break | 550% (req. ≥ 400) |
| Tensile Modulus (23°C) | 0.45 MPa (req. > 0.4) |
| Tensile Properties at Maintained | Pass Extension |
| Adhesion/Cohesion at Maintained | Pass Extension after Water Immersion |
| Adhesion/Cohesion at Variable | Pass Temperature |
| Elastic Recovery | 80% (req. ≥ 70) |
| Service Temperature | 40 – 90°C |
| Fire | Non-flammable |
Typical values. Refer to the TDS for full details and test conditions.
Application
Application
- Remove dust, oil and water from the substrate surfaces
- To confirm bonding and compatibility, carry out trials in advance on the actual substrate and environment
- Tack-free time and curing speed are influenced by ambient temperature and humidity
- Application conditions: temperature 5 – 35°C, humidity 50 – 70% RH
Packaging & storage
Packaging
- Cartridge: 310 ml
- Sausage: 400 ml / 600 ml
- Drum: 240 kg
Joint Sealant
Storage & shelf life
Keep sealed in a cool, dry place at 5 – 25°C and humidity ≤ 50% RH.
Health & safety
Precautions: Keep away from children. Avoid contact with skin and eyes. For skin contact, remove the sealant with a cloth and wash thoroughly with soap and water. For eye contact, hold eyelids apart, flush thoroughly with water and contact a physician. Additional information: Refer to MSDS (available on request).
