DESCRIPTIONComensflex 8275 is a low modulus, one component moisture-curing polyurethane adhesive sealant with permanent elasticity. It is manufactured strictly under the system of ISO9001 and ISO14001.
ADVANTAGESOne component, ready for immediate use, no mixing required
Excellent adhesion
High durability
High abrasion resistance and tear strength
Non-corrosive
Low modulus
Paintable
Good weathering and water resistance
Fast cure rate
Certified for use in contact with potable water
Can be painted over with many water-, solvent- and rubber-based paints (preliminary test recommended)
USESAs an elastic adhesive for:
Assembling metal framed buildings
Cover plates and covings
Light-weight construction materials
Acoustic ceiling tiles
Wood, metal or plastic window and
Door frames
PROCESSCleaning:
Clean, sound, dry and free of oil, grease and surface contaminants such as form release agents, curing membranes and hydrophobic water repellents. Thoroughly remove all loose particles and dust.
Priming:
Primers may be required to achieve optimal adhesion depending on the nature of substrates.
APPLICATION:Minimum application temperature 5° C. For easier use store cartridges at temperatures between 10~20° C. Break inner seal at extrusion end of cartridge. Affix nozzle to cartridge, cut tip to suit joint size. Install into a caulking gun. Apply in spots or beads on prepared surface, tapping or pressing the part to be adhered against the substrate. The thickness of the bead depends on the surface texture (1mm~5mm). For sausages, a barrel gun is required, clip the end of the sausage and place in barrel gun. Using the trigger extrude the sealant, to stop depress using the catch plaste. Apply Comensflex 8275 in a continuous bead using enough pressure to properly fill the joint. When masking sides of joints for neatness, remove tape before the sealant cures, Always allow sufficient surface exposed to moisture.
PACKAGING310ml cartridge, 20 PCS/carton
600ml sausage, 20 PCS/carton
STORAGE AND SHELF LIFEWhen stored at the recommended conditions in original, unopened containers, this product has a shelf life of 9 months.
The shelf life of polyurethane sealant is related to the temperature and humidity of the environment. The recommended storage temperature is 5-25° C, humidity is <50% RH. It is strictly prohibited that the transportation or storage temperature is over 30° C or the humidity is over 80% RH. And high-temperature container transportation is prohibited as well. In the long-time high temperature and high humidity storage environment, the product is easy to get viscous, extrusion will be deteriorated and shelf life will be shortened.
| Appearance | Uniform Paste |
| Color | Black, white, grey |
| Density | 1.40 ± 0.05 kg/l |
| Tack-free time | 45 min. approx. |
| Rate of cure | 2.6 mm/24 hrs |
| Shore A hardness | 40 approx. |
| Tensile strength | ≥2.5 N/mm2 |
| Elongation at break | ≥550% |
| Tear strength | ≥6 N/mm |
| Glass transition temperature | -45°C, approx. |
Service temperature (continuous)
Short – term (up to 48 hrs) | -40°C to +90°C
130°C |
Comens New Materials is a listed company in China ("Comens Materials", Stock Code:300200.SZ) committed to providing professional solutions for bonding (including lamination, wrapping, etc.), sealing and protection in the field of soft packaging, assembling, construction, furniture and building materials, etc.Series of adhesive, sealant, resin and coating have been developed based on polyurethane, silicon and MS (modified silicon).With the most-wide product range, best reputation and highest market share in China, Comens has been recognized as No.1 in China and the second largest producer in Asia in the field of polyurethane adhesives and sealants.
Following the mission of "satisfy diversified demand, provide professional service", Comens is striving to be a worldwide competitor in polyurethane adhesives, sealants and coatings.
