| Model Number: | PU821 |
|---|---|
| Brand Name: | SEPNA |
| Usage: | Construction,Woodworking, |
| Main Raw Material: | Polyurethane |
| Classification: | Other Adhesives |
| Place of Origin: | China (Mainland) |
Quick Details
Specifications
One Component Polyurethane Construction expansion joint sealant
PU821 is one component solvent-free polyurethane construction sealant of low modulus.
Key Features
1. Low modulus and high elasticity, good sealing and water-proof property2. One component, convenient to apply, nonpoisonous and odorless after curing, green and environmental
3. The new and used sealant has good compatibility, easy to repair
4. Moisture-cure, no cracking, no volume shrinkage after curing
5. Excellent aging, water and oil resistance, resist to puncture, moldiness
6. Excellent extrudability, easy to scratch sewing operation
7. Bonding well with many substrates, no corrosion and pollution to substrate
Typical Applications
1. Sealing of expansion and settlement joint of house building, plaza, road, airport runway, anti-wall, bridges and tunnels, building doors and windows etc.2. Sealing of upstream face crack of drainage pipeline, drains, reservoirs, sewage pipes, tanks, silos etc.
3. Sealing of through holes on various wall and at floor concrete
4. Sealing of joints of prefab, side fascia, stone and color steel plate, epoxy floor etc.
Technical Data Table
Cleaning: Clean and dry all surfaces by removing foreign matter and contaminants such as oil dust, grease, frost, water, dirt, old sealants and any protective coating.
For cartridge
1. Cut nozzle to give the required angle and bead size
2. Pierce the membrane at the top of the cartridge and screw on the nozzle
3. Place the cartridge in an applicator gun and squeeze the trigger with equal strength
For sausage
1. Clip the end of the sausage and place in barrel gun
2. Screw end cap and nozzle on to barrel gun
3. Using the trigger extrude the sealant with equal strength
Attention of operation
1. Choose this product, primer, activator and other matching product, must have bonding test before bonding the materials, to ensure that they have good compatibility. At the same time, before application, should guarantee that the sealant, primer and activator are in the warranty period.
2. Please strictly according to the application process, any violation of the application operation may cause bonding failure. This product is innocuous after curing completely, but before curing, please avoids contacting with eyes and skin. In case of eyes and skin contact, wash immediately and thoroughly with soap and water. If the situation is serious, please go to see a doctor immediately.
| PROPERTY | STANDARD/UNITS | VALUE |
| Main raw material | ----- | Polyurethane |
| Appearance | Visual inspection | Black/white/gray, paste |
| Density | Gr/cc | 1.35±0.1 |
| Volatile content | % | ≤4 |
| Tack free time | min | ≤180 |
| Curing speed | mm/ 24hrs | 3~5 |
| Hardness | Shore A | 30±5 |
| Tensile modulus | MPa | ≤0.4 |
| Elongation at break | % | ≥600 |
| Application temperature | °C | 5~35 |
| Temperature resistance | Up to 1 hour short time, °C | 150 |
| Shelf life | month | 9 |
Directions of Use
Cleaning: Clean and dry all surfaces by removing foreign matter and contaminants such as oil dust, grease, frost, water, dirt, old sealants and any protective coating.
For cartridge
1. Cut nozzle to give the required angle and bead size
2. Pierce the membrane at the top of the cartridge and screw on the nozzle
3. Place the cartridge in an applicator gun and squeeze the trigger with equal strength
For sausage
1. Clip the end of the sausage and place in barrel gun
2. Screw end cap and nozzle on to barrel gun
3. Using the trigger extrude the sealant with equal strength
Attention of operation
1. Choose this product, primer, activator and other matching product, must have bonding test before bonding the materials, to ensure that they have good compatibility. At the same time, before application, should guarantee that the sealant, primer and activator are in the warranty period.
2. Please strictly according to the application process, any violation of the application operation may cause bonding failure. This product is innocuous after curing completely, but before curing, please avoids contacting with eyes and skin. In case of eyes and skin contact, wash immediately and thoroughly with soap and water. If the situation is serious, please go to see a doctor immediately.