LOCTITE 380
Harmonization Code : 3506.91.90.99 | Prepared glues and other prepared adhesives, not elsewhere specified or included; products suitable for use as glues or adhesives, put up for retail sale as glues or adhesives, not exceeding a net weight of 1 kg ; Adhesives based on polymers of headings 3901 to 3913 or on rubber; Other ; Other
Main features
- Rubber-Toughened Shock Resistance
- Black Bondline Identification
- Fast Multi-Substrate Fixturing
Product Description
LOCTITE 380 is a one-part, medium-viscosity ethyl cyanoacrylate instant adhesive for bonding metals, plastics, and rubbers. The black liquid cures with atmospheric moisture and is rubber toughened to increase flexibility, peel strength, and shock resistance. Fixture times vary by substrate, ranging from 10 to 30 seconds on aluminum and 60 to 120 seconds on degreased steel at 22 deg C and 50% relative humidity. After 24 hours at 22 deg C, grit-blasted steel lap shear strength is 26 N/mm^2. The adhesive performs best in thin bond gaps and is suited to assemblies requiring a black, impact-resistant instant bond.
Key features
- Rubber-Toughened Bond: The cured adhesive provides increased flexibility, peel strength, and shock resistance.
- Black Bondline: The black liquid provides a visible bondline for dark or opaque assemblies.
- Substrate-Specific Fixture: Fixture times range from seconds to minutes depending on the bonded material.
Applications / Suitable for
- Instant bonding of metals
- Bonding plastics and rubbers
- Black, shock-resistant close-fitting joints
TDS, SDS & Technical Documents
Technical Specifications
General Properties
Thermal Properties
Physical Properties
Electrical Properties
Curing Conditions
Additional Information
As-supplied / before-processing properties
Typical values for the uncured or as-supplied product unless otherwise noted.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Appearance | Black liquid | - | Uncured |
| Specific gravity | 1.1 | - | 25 deg C |
| Viscosity | 100 to 800 | mPa s | Brookfield RVT, spindle 3, 50 rpm, 25 deg C |
After-processing / final-state properties
Typical values for the cured product under the listed methods and conditions.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Coefficient of thermal expansion | 80 x 10^-6 | K^-1 | ISO 11359-2; cured 24 hours at 22 deg C |
| Thermal conductivity | 0.1 | W/(m K) | ISO 8302; same cure |
| Glass transition temperature | 120 | deg C | ASTM E 228; same cure |
| Dielectric breakdown strength | 25 | kV/mm | IEC 60243-1; same cure |
| Lap shear strength | 26 | N/mm^2 | ISO 4587; grit-blasted steel; cured 24 hours at 22 deg C |
| Tensile strength | 18.5 | N/mm^2 | ISO 6922; grit-blasted steel; cured 24 hours at 22 deg C |
