Product Overview
TH-V7900 Outdoor EPI Adhesive (EN 204/D4) is a premium two-component Emulsion Polymer Isocyanate (EPI) system specially engineered by TH-BOND for edge-gluing hardwoods and exotic premium outdoor timbers. Driven by a major breakthrough in sustainable crosslinking formulation, the product perfectly complies with two of the most rigorous international quality standards: EN 204/D4 and ASTM D5751. Completely distinguishing itself from conventional wood glues, TH-V7900 provides exceptional water, solvent, and mild chemical resistance combined with extreme outdoor weatherability, making it the premier choice for load-bearing timber structures and exterior furniture.
Key Features & Technical Applications
The product delivers outstanding technical performance indicators, optimized for premium export woodworking sectors:
- High Bond Durability: Provides ultra-strong adhesion to complex hardwood species and heat-treated (thermally modified) timbers.
- Oily Surface Adaptation: Exhibits excellent wetting and bonding on surfaces containing natural essential oils characteristic of premium exotics.
- Superior Weather Resistance: Validated by EN 204/D4 and ASTM D5751 certifications for water immersion, heat resistance, and outdoor UV durability.
- Versatile Applications: Widely utilized in manufacturing garden furniture, exterior doors, outdoor louvers, exterior decking, and high load-bearing timber joints.
Detailed Application Guide
To achieve ideal mechanical bond strength and maximum exterior durability, please strictly adhere to the manufacturer's standard workflow:
- 1. Surface Preparation: Ensure timber surfaces are clean, completely dry, and maintained within an ideal wood moisture content (MC) of 8–12%.
- 2. Mixing Ratio: Precisely weigh and mix the base adhesive with the hardener (catalyst) at a standard ratio of 100:15 using an electronic scale.
- 3. Glue Spread Rate: Apply the adhesive uniformly onto the timber surface via a roller or specialized glue spreader at a density of 150–200 g/m².
- 4. Pressing Cycle: Apply a clamping pressure of 8–12 kg/cm² for a duration of 15–30 minutes (measured at an ambient temperature of 20°C).
- 5. Curing and Conditioning: Allow the pressed components to condition for a minimum of 24 hours before proceeding with subsequent mechanical machining.
Quality Certifications & Test Results
TH-V7900 has successfully passed rigorous evaluation processes, securing full regulatory and technical certification profiles required for exporting exterior furniture to highly demanding international markets:
Technical Specifications
Below are the typical empirical performance values of the TH-V7900 outdoor adhesive system under standardized measurements:
| Technical Parameter |
Typical Measurement Value |
| Adhesive type |
2-component EPI (Emulsion Polymer Isocyanate) |
| Color |
Milky white when wet, shifts to crystal clear when fully cured |
| Mixing ratio |
100 : 15 (Base adhesive : Hardener) |
| Viscosity |
5,000 ~ 10,000 mPa.s |
| Open time |
8 ~ 12 Minutes |
| Pressing pressure |
8 ~ 12 kg/cm² |
| Pressing time |
15 ~ 30 min at 20°C |
* Technical Notice: The open time of the mixed adhesive ranges from 8 to 12 minutes depending on wood moisture and workshop ambient temperatures. Assembly and pressing must be executed immediately within this timeframe to prevent the adhesive film from skinning or precuring.
