Loctite EA 0151 Epoxy Ultra Clear Gel 50-Minute Work Life Slow Setting - 3.34oz Two-Tube Kit

Product Name: Loctite EA 0151 Epoxy Ultra Clear Gel (formerly Hysol 0151)

Loctite EA 0151 is a specialized, clear, thixotropic (non-sag) epoxy paste designed for optical and general-purpose bonding. Its defining feature is that it is a "gel" that stays put on vertical surfaces but cures to an ultra-clear finish, which is rare for paste adhesives. It has a long 50-minute work life, making it a favorite for intricate assemblies like fiber optics, where time is needed for precise alignment before the adhesive sets.

Popular Applications & Uses
- Bonding fiber optic components and connectors (industry standard application).
- Assembling glass, windows, or lenses where a clear, gap-filling adhesive is needed.
- General structural bonding of dissimilar materials (metals, glass, ceramics).
- Potting or encapsulating small components requiring visibility.
- Repairing broken glass or ceramic items where the bond line must be invisible but gap-filling.

Industries that Commonly Use It
- Fiber Optics and Telecommunications
- Optical Manufacturing
- Electronics Assembly
- Medical Device Manufacturing (Non-implant)
- General Industrial Repair

Special and Unique Features
- Ultra Clear: Cures to a transparent finish, suitable for optical paths and aesthetic bonds.
- Thixotropic Gel: A non-sag paste consistency that won't run or drip, unlike most clear liquid epoxies.
- Long Work Life: 50+ minute open time allows for careful positioning and adjustment.
- Impact Resistant: Cures to a rigid but durable solid that resists shock.
- Easy Mix: 2.7:1 mix ratio by volume (or 100:33 by weight) - typically supplied in pre-measured kits.

Key Properties
- Base: Epoxy
- Color: Ultra Clear (Resin is milky, Hardener is amber/translucent -> Cures Clear)
- Viscosity: Thixotropic Paste
- Hardness: ~85 Shore D (Rigid)
- Shear Strength: ~1,850 - 3,000 psi
- Dielectric Strength: 1080 V/mil

Materials Bonded
- Glass and Optics (Excellent)
- Metals (Aluminum, Steel, Brass)
- Ceramics
- Circuit Boards
- Many Rigid Plastics

Cure Information
- Work Life: 60 minutes.
- Fixture Time: 6 - 8 hours.
- Full Cure: 24 hours (at room temp) or accelerated with heat.

Known backups / known substitutes for this product
- Loctite EA E-30CL (Clear, long work life, but *liquid/flowable* - use if you don't need a gel).
- Epoxy Technology EPO-TEK 301 (Optical grade liquid).
- ÅngströmBond AB9112 (Fiber optic standard).

Comparison Note
- Loctite EA 0151 fills a very specific niche: it is **Clear** AND a **Gel**. Most clear epoxies (like E-30CL or E-05CL) are liquids that will run off a vertical surface. Most gels (like 1C or E-20HP) are opaque white or gray. If you need to bond a vertical glass lens or fiber optic cable without the glue running away, 0151 is the correct choice.