Epoxy adhesive EP64

for metalsfor aeronauticsfor ceramics

Product Description
Master Bond EP64 is a two-component epoxy system providing a long working life at room temperature. It uses a forgiving 100:5 mix ratio by weight and, once mixed, forms a moderate-viscosity compound with good flow. A 100 g batch yields approximately 12–24 hours working time at ambient temperature. EP64 is solvent-free and low-shrinkage, bonds metals, plastics, rubbers, ceramics and composites, and exhibits an exceptionally high glass transition temperature (~210–215°C) that delivers excellent thermal and chemical resistance. The cured material resists many aggressive chemicals including acids, bases and various solvents, functions as an electrical insulator and is compatible with vacuum conditions.

Key Features

• Long open time at room temperature
• Convenient elevated-temperature cure
• High glass transition temperature (~210–215°C)
• Passes NASA low outgassing / ASTM E595

Typical Properties
Viscosity: 50,000–90,000 cps
Cure schedule: 80–90°C for 4–6 hours; post-cure 120–130°C for 2–4 hours
Hardness: 80–90 Shore D
Service temperature: -60°F to +450°F [-51°C to +232°C]
Glass transition (Tg): 210–215°C
Volume resistivity: >10^14 ohm-cm

Product Advantages

• Very long working life
• Good flow characteristics
• Very high glass transition temperature
• Resistance to aggressive chemicals at elevated temperatures

Applications

• Bonding of metals, plastics, rubbers, ceramics and composites
• Sealing
• Aerospace, electronics, specialty OEM and optical applications requiring high Tg and vacuum compatibility

Certifications

• ASTM E595 compliant (NASA low outgassing)
• Meets EU Directive 2015/863 (RoHS)

Packaging

• Syringes
• Cans
• Premixed & frozen syringes

Technical specifications

• Product type: Two-component epoxy, vacuum compatible, solvent-free, low shrinkage
• Mix ratio (weight): 100 : 5 (Part A : Part B)
• Working life (100 g batch): ~12–24 hours at room temperature
• Cure: 80–90°C for 4–6 hours; post-cure 120–130°C for 2–4 hours
• Viscosity: 50,000–90,000 cps (mixed)
• Glass transition (Tg): 210–215°C
• Hardness: 80–90 Shore D
• Service temperature: -60°F to +450°F [-51°C to +232°C]
• Electrical: Volume resistivity >10^14 ohm-cm (electrically insulating)
• Color (uncured): Part A clear; Part B dark brown