Loctite EA (Hysol) 1C Epoxy - 4oz Two-Tube Kit

Product Name

Loctite EA (Hysol) 1C Epoxy - 4oz Two-Tube Kit

Brief Description

Loctite EA 1C (formerly Hysol 1C) is a two-part, off-white, general-purpose epoxy adhesive and sealant. It is renowned for its high strength, excellent environmental resistance, and versatility across a wide variety of substrates. This formula cures at room temperature, though heat can accelerate the process, and once cured, it is both machinable and sandable.

Popular Applications & Uses

• Structural bonding of various materials.
• General repairs and maintenance.
• Sealing applications.
• Gap filling due to its high viscosity.
• Applications requiring high service temperature.
• Environments demanding low outgassing properties, including high vacuum systems.

Industries that Commonly Use It

• Aerospace/Defense
• Automotive Service/Repair
• Cabinet & Woodworking
• Construction/ Building Services
• Distributers & Resellers
• Engineering Services
• Fabrication
• General Manufacturing
• Marine
• Metal Fabrication
• Mold Making/ Casting
• Plastic Fabrication
• Prosumer
• Special Effects/ Scenic Design

Special and Unique Features

• **Machinable and Sandable:** Allows for finishing and shaping after full cure.
• **High Service Temperature:** Withstands temperatures up to +250 °F (+121 °C).
• **Low Outgassing Properties:** Suitable for sensitive applications, including vacuum environments.
• **Excellent Environmental Resistance:** Maintains performance in severe conditions.
• **Good Gap-Filling Capability:** High viscosity allows for bonding uneven surfaces.
• **Room Temperature Cure:** Convenient for various applications without requiring specialized heating equipment.

Key Properties

• **Technology:** Epoxy
• **Chemical Type:** Epoxy
• **Components:** Two-part (Resin & Hardener)
• **Appearance (Mixed):** Off-white
• **Work Time:** 25 minutes
• **Full Cure Time:** 24 hours @ 25 °C (room temperature); faster with heat (e.g., 2 hours @ 60 °C).
• **Shear Strength:** 1500 psi
• **Max Operating Temperature:** +250 °F (+121 °C)
• **Shore Hardness:** 65 Shore D
• **Viscosity (Mixed):** 350,000 cPs (thixotropic/thick gel or paste)
• **Low Outgassing:** Yes

Surface Compatibility

Loctite EA 1C is a versatile adhesive compatible with a wide range of materials, including:

• Metals
• Most Plastics
• Wood
• Ceramic
• Glass

Known backups / known substitutes

• **Loctite EA 9460 Hysol:** A high-performance, two-part epoxy adhesive, often considered for strong bonds on metals, plastics, and thermoset laminates, with high peel and shear strength.
• **Torr Seal:** Loctite EA 1C is considered a direct equivalent for high vacuum applications.
• **3M Scotch-Weld Epoxies:** Other general-purpose two-part epoxies from reputable brands like 3M offer similar adhesive solutions.

Comparison Note

Loctite EA 1C (formerly Hysol 1C) is a highly versatile, high-performance epoxy adhesive that strikes a balance between strength, environmental resistance, and user-friendliness. Its room-temperature cure and machinable/sandable properties make it adaptable for a broad spectrum of general-purpose and demanding applications. A key differentiator is its low outgassing characteristic, which makes it particularly suitable for sensitive environments such as vacuum systems, where many standard epoxies would not perform adequately.