Epoxy adhesive EP64

for rubberfor plasticsfor ceramics

Product Subtitle
Two-component, vacuum-compatible epoxy with convenient handling featuring outstanding temperature and chemical resistance

Key Features

• Long open time at room temperature
• Convenient elevated temperature cure
• High glass transition temperature
• Passes NASA low outgassing (ASTM E595 compliant)

Typical Properties

• Viscosity: 50,000–90,000 cps
• Cure Schedule: 80–90°C for 4–6 hours, followed by a post cure at 120–130°C for 2–4 hours (recommended cure schedule noted in product text: 80–90°C for 4–5 hours, followed by a post cure at 120–130°C for 2–3 hours)
• Hardness: 80–90 Shore D
• Service Temperature Range: -60°F to +450°F [-51°C to +232°C]
• Glass Transition Temperature (Tg): 210–215°C
• Volume Resistivity: >10^14 ohm·cm

Product Description
Master Bond EP64 is a two-component epoxy system with a long working life at ambient temperature. It has a forgiving 100-to-5 mix ratio by weight and, once combined, forms a moderate viscosity mixture that flows well. A 100 gram batch offers a 12–24 hour working life at room temperature. The epoxy contains no solvents or diluents and has low shrinkage upon curing. The system bonds well to a wide variety of substrates such as metals, plastics, rubbers, ceramics and composites. Upon curing, EP64 features an exceptionally high glass transition temperature of 210°C which ultimately translates into superb temperature and chemical resistance. The epoxy withstands a host of aggressive chemicals including acids, bases, and many solvents. EP64 is a dependable electrical insulating material. The color of Part A is clear and Part B is dark brown. This epoxy provides reliable bonding and sealing performance for aerospace, electronics, specialty OEM, and optical applications requiring high Tg, outstanding chemical resistance, and stable performance under vacuum conditions.

Product Advantages

• Very long working life
• Good flow properties
• Very high glass transition temperature
• Resists aggressive chemicals at higher temperatures

Applications

• Bonding
• Sealing

Certifications

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

Packaging

• Syringes
• Cans
• Premixed & Frozen Syringe

Technical Specifications

• Model: EP64
• Mix Ratio: 100-to-5 by weight
• Working Life (100 g batch at room temperature): 12–24 hours
• Viscosity: 50,000–90,000 cps
• Cure Schedule: 80–90°C for 4–6 hours; post cure 120–130°C for 2–4 hours (recommended variations 4–5 hours and 2–3 hours noted)
• Hardness: 80–90 Shore D
• Glass Transition Temperature (Tg): 210–215°C
• Service Temperature Range: -60°F to +450°F [-51°C to +232°C]
• Volume Resistivity: >10^14 ohm·cm
• Colors: Part A clear; Part B dark brown
• No solvents or diluents; low shrinkage on cure
• Vacuum compatible; passes NASA low outgassing (ASTM E595)
• Excellent chemical resistance to acids, bases and many solvents
• Good adhesion to metals, plastics, rubbers, ceramics and composites
• Electrical insulating