Henkel Loctite® 243 Medium-Strength Blue Threadlocker Sealant, 10 mL Bottle

Name: Henkel Loctite® 243 Medium-Strength Blue Threadlocker Sealant, 10 mL Bottle
Brand: Henkel Loctite
SKU: 1329837=6P
Price: Price on request USD
Availability: InStock

Henkel Loctite

Part # 1329837=6P

Mfr Part # 1329837

Loctite 243 is a medium-strength, blue threadlocker designed to secure and seal metal fasteners, providing reliable vibration resistance and primerless adhesion on active and passive metals.

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Boeing Distribution (formerly Aviall)

Overview

Henkel Loctite® 243 is a blue, general-purpose threadlocker formulated for locking and sealing threaded fasteners that require normal disassembly with standard hand tools. This medium-strength adhesive cures anaerobically between close-fitting metal surfaces, preventing loosening and leakage caused by shock, vibration, and thermal cycling.
The thixotropic formulation reduces migration, ensuring controlled application on vertical or overhead fasteners. Loctite 243 works effectively on all metals, including passive substrates like stainless steel, aluminum, and plated finishes. It tolerates minor contamination from industrial oils, cutting fluids, lubrication oils, and corrosion-prevention coatings, making it suitable for “as‑received” fasteners.

Features & Benefits

Medium-strength threadlocker removable with standard hand tools
Primerless performance on active and passive metals
Tolerates minor oil contamination during application
Prevents loosening and leakage from vibration
One-part anaerobic cure; no mixing required
Suitable for pumps, motors, gearboxes, and vehicle assemblies
NSF/ANSI 61 certified for added compliance

Specifications

Color: Blue
Container Size: 10 mL bottle
Technology: Acrylic
Chemical Type: Dimethacrylate ester
Viscosity: 1300–3000 mPa·s (thixotropic)
Cure Type: Anaerobic
Secondary Cure: Activator
Specific Gravity: 1.09
VOC Content: 11.88 g/L
Tensile Strength: 230 psi
Shear Strength: 1100 psi
Boiling Point: > 300.2°F
Flash Point: > 199.4°F
Vapor Pressure: < 0.1 mm Hg at 80.6°F
Service Temperature Range: -65°F to 360°F
Cure Time: 24 hours
Appearance (Uncured): Blue, fluorescent under UV

Technical Information

NSF/ANSI 61 Certified
CFIA Listed

Applications

Threaded fasteners in pumps, motors, gearboxes, and compressors
Vehicle maintenance and assembly
Machinery subject to shock or vibration
General industrial threaded joint sealing
Metal fastener locking on passive or active substrates

Related Products:

Loctite SF 7471: 1.75 oz, 4.5 oz aerosol, 1 gallon

Loctite SF 7649: 1.75 oz, 4.5 oz aerosol

Technical Information

FAA Approval Code

N/R

Condition

New

Country of Origin

United States

Harmonized Tariff Schedule Code

3506100000

Lead Time (Days)

Shelf Life

Yes

Total Shelf Life (Days)

730

Forecasted

Yes

Dimensions (L x W x H)

1.25 x 1.25 x 3.75

Package Weight

0.02 LB

Shipping Details

Hazmat Code

ZND

ECCN

EAR99

Schedule B