5. Application

• Stirring: Some precipitation may occur during storage. Stir the product thoroughly before use to ensure uniform mixing. If the application process is extended, stir every 2 hours for 3-5 minutes.
• Dilution: Dilute as needed based on operational requirements. The diluted product should be used immediately and not stored for long periods.
  • Brush Coating: No dilution required.
  • Roller Coating: No dilution required.
  • Dipping: 100 parts of 841 + 40-70 parts diluent.
  • Spraying: 100 parts of 841 + 40-70 parts diluent.
• Coating: Can be applied by brushing, dipping, rolling, or spraying. Ensure an even coat to prevent excessive spillage.
• Dry Film Thickness (DFT): 15-30 μm per single coat.
• Drying Time: At 25°C, drying takes 45-60 minutes. For forced drying, gradually increase the temperature to 60°C to prevent bubble formation in the adhesive film.
• Pre-Drying: For optimal bonding, pre-dry at 100°C for 1 hour (recommended 2 hours). For the best adhesive strength and resistance, pre-drying for 4-8 hours at 100°C is recommended.
  • Maximum Pre-Drying Temperatures:
    • 100°C: Up to 48 hours
    • 110°C: Up to 24 hours
    • 120°C: Up to 15 hours
    • 130°C: Must be carefully controlled.
• Storage: Store in a dry, temperature-controlled environment, avoiding prolonged exposure to high humidity and high temperatures.
• Cleaning: Before heating and vulcanization, remove any excess adhesive using a rag soaked in 2-Butanone solvent. Once cured, the adhesive cannot be removed with solvents.
• Vulcanization: For optimal adhesive performance, vulcanize both the polyurethane elastomer and adhesive simultaneously. The vulcanization temperature should ideally be above 75°C.

6. Shelf Life/Storage

The shelf life is 12 months from the date of shipment when stored at 21-27°C (70-80°F) in the original, unopened container. Do not store or use near heat, sparks, or open flames.

7. Precautions

• This product is volatile—always close the container after use.
• The solvent vapors are harmful. Ensure proper ventilation in the workspace, avoid prolonged inhalation or skin contact, and take precautions against fire hazards.
• Refer to the Safety Data Sheet (SDS) for more detailed safety information.

Qingdao Exceed Fine Chemicals Co., Ltd is a high-tech enterprise that integrates manufacturing and trading. We specialize in the production of polyurethane-based products.

Our company is dedicated to investing in research and development of cutting-edge products, collaborating with leading Chinese universities and institutions. We have successfully developed a heat-vulcanization, environmentally friendly bonding adhesive that rivals the quality of world-renowned brands like Lord and Dow.

At Exceed, we believe in the power of science

Qingdao Exceed Fine Chemicals boasts a team of over 30 skilled technicians, supported by advanced manufacturing equipment and robust production processes. We maintain an independent R&D institute and foster strong collaborations with leading universities and research institutions to continuously enhance our production processes, product quality, and performance.

With decades of dedicated efforts, we have successfully exported our products to markets across the globe, including Europe, Asia, North America, South America, Oceania, and Africa.

Furthermore, leveraging our extensive domestic network, we act as a reliable purchasing agent, assisting customers in sourcing specific materials according to their unique requirements.

Furthermore, we employ a dedicated team of quality control (QC) professionals with expertise in the field of chemicals. This rigorous quality control ensures consistent and reliable product quality for our valued customers.

Currently, we achieve annual export sales exceeding USD 30 million to over 30 countries worldwide, encompassing a diverse product range including polyurethane chemicals, heat-vulcanization environmental friendly bonding adhesive etc.

We understand that customers prioritize competitive pricing, exceptional quality, and consistent product availability. We firmly believe that Exceedchem is the ideal partner to fulfill your specific needs.

As a trusted purchasing agent for clients worldwide, we leverage our extensive experience to source high-quality products at competitive prices. Our primary objective is to deliver the most cost-effective solutions while maintaining the highest standards of quality.