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

LOCTITE 220 LOCTITE 220

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
Product Family

LOCTITE 220

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TDS, SDS & Technical Documents

Technical Specifications

General Properties
Appearance
Appearance at room temperature.
Liquid
Chemistry Type
Dimethacrylate ester
Color
The color
Blue
Component System
Describes the number of components that must be supplied, mixed, or activated before application or cure.
1K
Specific Gravity
Specific gravity (SG) is the ratio of the density of a substance to the density of a reference substance; equivalently, it is the ratio of the mass of a substance to the mass of a reference substance for the same given volume. For liquids, the reference substance is almost always water (1), while for gases, it is air (1.18) at room temperature. Specific gravity is unitless.
1.08
Physical Properties
Viscosity
Viscosity is a measurement of a fluid’s resistance to flow. Viscosity is commonly measured in centiPoise (cP). One cP is defined as the viscosity of water and all other viscosities are derived from this base. MPa is another common unit with a 1:1 conversion to cP. A product like honey would have a much higher viscosity -around 10,000 cPs- compared to water. As a result, honey would flow much slower out of a tipped glass than water would. The viscosity of a material can be decreased with an increase in temperature in order to better suit an application
20 mPa.s

Additional Information

Technical properties

As-supplied / before-processing properties

Typical values for the product before cure or assembly.

PropertyValueUnitMethod / condition
AppearanceBlue liquid-Uncured
ComponentsOne-No mixing required
Cure mechanismAnaerobic-Cures between close-fitting metal surfaces without air
Specific gravity1.08-Typical at 25 deg C
Viscosity20mPa sCannon-Fenske, ISO 3104
FluorescencePositive-Visible under UV light
Technical properties

After-processing / final-state properties

Typical values for the cured product under the listed conditions.

PropertyValueUnitMethod / condition
Full cure24hAt 23 deg C
Alternate full cure1hAt 93 deg C
Breakaway torque9.7N mCured 24 h at 23 deg C; 3/8 x 16 grade 2 nuts and grade 5 bolts
Prevail torque19N mCured 24 h at 23 deg C; 3/8 x 16 grade 2 nuts and grade 5 bolts
Breakaway torque9.1N mCured 15 min at 23 deg C; 3/8 x 16 grade 2 nuts and grade 5 bolts
Prevail torque15N mCured 15 min at 23 deg C; 3/8 x 16 grade 2 nuts and grade 5 bolts

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