LOCTITE 220
Harmonization Code : 3824.99.92.97 | Prepared binders for foundry molds or cores; chemical products and preparations of the chemical or allied industries (including those consisting of mixtures of natural products), not elsewhere specified or included: other : other : other
Main features
- Wicking Preassembled Threadlocking
- Low-Strength Hand-Tool Removal
- UV-Visible Application Inspection
Product Description
LOCTITE 220 is a blue, low-viscosity anaerobic threadlocker for locking and sealing small preassembled metal fasteners. Its wicking liquid reaches engaged threads without disassembly, then cures between close-fitting metal surfaces in the absence of air. The low-strength formulation supports later removal with standard hand tools, while UV fluorescence assists application inspection. LOCTITE 220 is especially useful for set screws, long-engagement fasteners, and threaded assemblies under approximately 6 mm where controlled retention is needed without permanent locking. The product is supplied as a one-component liquid, so no mixing is required before application.
Key features
- Wicking application: Low viscosity allows the liquid to penetrate engaged threads on preassembled fasteners.
- Serviceable low strength: Cured fasteners can be removed with standard hand tools.
- UV-visible inspection: Blue material fluoresces under UV light to support application checks.
Applications / Suitable for
- Preassembled threaded fasteners under approximately 6 mm
- Set screws and adjustment screws
- Long-engagement fasteners requiring hand-tool disassembly
TDS, SDS & Technical Documents
Technical Specifications
General Properties
Physical Properties
Additional Information
As-supplied / before-processing properties
Typical values for the product before cure or assembly.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Appearance | Blue liquid | - | Uncured |
| Components | One | - | No mixing required |
| Cure mechanism | Anaerobic | - | Cures between close-fitting metal surfaces without air |
| Specific gravity | 1.08 | - | Typical at 25 deg C |
| Viscosity | 20 | mPa s | Cannon-Fenske, ISO 3104 |
| Fluorescence | Positive | - | Visible under UV light |
After-processing / final-state properties
Typical values for the cured product under the listed conditions.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Full cure | 24 | h | At 23 deg C |
| Alternate full cure | 1 | h | At 93 deg C |
| Breakaway torque | 9.7 | N m | Cured 24 h at 23 deg C; 3/8 x 16 grade 2 nuts and grade 5 bolts |
| Prevail torque | 19 | N m | Cured 24 h at 23 deg C; 3/8 x 16 grade 2 nuts and grade 5 bolts |
| Breakaway torque | 9.1 | N m | Cured 15 min at 23 deg C; 3/8 x 16 grade 2 nuts and grade 5 bolts |
| Prevail torque | 15 | N m | Cured 15 min at 23 deg C; 3/8 x 16 grade 2 nuts and grade 5 bolts |
