JGN812 is a two-component epoxy adhesive engineered for bonding and repairing composite wind turbine blades in factory and field.
Summary Benefits at a Glance
Long pot life at room temperature, flexible assembly window
High shear and peel strength; strong fatigue performance
Cures reliably under wide temperature and humidity ranges
Excellent durability to thermal cycling and moisture aging
Product Introduction
JGN812 is a structural epoxy adhesive designed for FRP/composite wind turbine blades, core materials and metal inserts. The A:B system provides a balanced rheology for gap filling and wet-out, a long workable time at 23 °C for large parts, and high final strength after curing. It performs under manufacturing and field repair conditions, maintaining bonding reliability after thermal cycling and humidity aging. Typical uses include blade shell bonding, spar cap bonding, trailing-edge bonding and structural crack repair.
Product Parameters
| Item | Value / Requirement |
|---|---|
| Mixing ratio (A:B, by weight) | 100:50 |
| Pot life at 23 °C | ≥ 120 min |
| Glass transition temperature Tg | ≥ 75 °C |
| Shear strength at room temp (FRP/FRP) | ≥ 30 MPa |
| Shear strength at 80 °C (FRP/FRP) | ≥ 15 MPa |
| Tensile strength after humidity aging 1000 h | ≥ 25 MPa |
| Tensile strength after humidity aging 2000 h | ≥ 20 MPa |
| Peel strength | ≥ 30 N/mm |
| Elongation at break | ≥ 2.0 % |
| Elastic modulus | ≥ 1.0 GPa |
| Fracture toughness KIC | ≥ 2.0 MPa·m^1/2 |
| Fatigue resistance (10^6 cycles) | Pass |
| Thermal cycling resistance (−40 °C to +50 °C) | Pass |
| Service temperature | −40 to +80 °C |
Product Usage
Substrate preparation
Grind or abrade bonding surfaces; remove dust, grease and contaminants; dry and clean.
Mixing
Mix component A and B at 100:50 by weight until color and texture are uniform; avoid entrapped air.
Application
Apply a continuous adhesive layer to both surfaces; assemble within pot life; fix parts with clamps or fixtures to maintain bondline.
Curing
Ambient cure at 23 °C (typical) or accelerate with controlled heating per process window. Do not move parts until handling strength is achieved.
Packaging & Storage
Standard kit: A 15 kg + B 5 kg (other packages on request).
Shelf life: 12 months in unopened containers at 5–25 °C, cool and dry, away from sunlight.
Notes
Verify compatibility with specific substrates by trial bonding.
Observe PPE and ventilation requirements when handling epoxy systems.
Hot Products
Our silane impregnating agent acts as an advanced silane penetrating sealer and silane water repellent, providing invisible, long-lasting protection for concrete structures. It penetrates deeply (≥3mm in ordinary concrete) to inhibit corrosion from seawater, salt spray, and deicing agents, ensuring durability in harsh environments like bridges an
Rapid Setting Anchoring Cementitious Grout
Fast-setting cementitious grout for structural anchoring. Ideal for rail sleepers, bridge bearings, and tunnel rods
Carbon fiber mesh reinforcement for concrete structures. Improves load capacity, controls cracks, and resists corrosion.
High-performance two-component epoxy adhesive for concrete and steel bonding in underwater and high-humidity environments. Delivers excellent bonding strength, chemical resistance, and construction efficiency.
Epoxy-based flexible concrete for expansion joint repair, asphalt crack sealing, and pavement defect patching. Fast-setting, high-strength, and durable solution.
Start Enhancing Your Business With a Concrete Solution Today
Our products have undergone rigorous testing at our national testing laboratory (CABR testing center co., ltd). Renowned Fortune Global 500 firms such as China Railway Group Limited, China Communications Construction Company Limited, and Sinohydro are among our esteemed clients.
Navigation
Navigation
Contact Us
Get in Touch
Get in Touch
