Threadlocker

When to Use

Use blue threadlocker when:

• Fasteners are exposed to vibration
• A joint must stay secure over time
• A Nylock nut is not practical

Polycarbonate Warning

Do not use threadlocker in contact with polycarbonate (Lexan) or other stress-sensitive plastics.

• It can cause cracking or “crazing” in the material
• It can weaken plastic parts over time

Instead, use:

• Nylock nuts
• Proper mechanical fastening methods (washers, spacers, correct bolt length)

Application

• Apply a small amount to metal threads only
• Avoid excess that could spread onto plastic
• Let the joint fully tighten before curing

Key Idea

Threadlocker is a backup for vibration resistance, not a replacement for proper fastener selection or good mechanical design.