Is there a solvent or dremel attachement that will remove this stuff from bolt threads?

You don't need solvent or dremel. It will keep any screw or bolt from loosening, but you can get the bolt/screw out with a screwdriver and just brush off the Loctite. Very good stuff.

Do I apply this to my doorknob set screw before screwing it in or after? (ie, a drop on top?)

Before. You apply this to the screw threads before screwing in. Make sure you only apply a very little bit. More is not better.

how do I open the sealed tube? do I just poke a hole at the top?

I think it's best to use a thumbtack, safety pin, etc. to poke a hole into the flat tip. This will give you "droplet-sized control" in application.

can this be used in glasses? The screws that hold the lenses in place?

No, it is designed for larger screws. Use Loctite 222 for small screws.

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Loctite スレッドロッカーチューブ

Product ID: 733231172

Details

Brand
LOCTITE
Specific Uses For Product
Automotive DIY
Material
Thread Sealant
Special Feature
Vibration
Color
Blue 242

⏳Fully cures in 24 hours

🔩Locks 6-20mm fasteners

🛡️Prevents leaks & rust

$199.38

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Description

🔧 Lock it down, keep it tight, and never miss a beat!

RUST LEAK DEFENSE - Seals threads to prevent leaks and corrosion, extending the life of your equipment.
REMOVABLE WHEN NEEDED - Medium strength formula allows disassembly with hand tools—control without compromise.
PRECISION FIT FOR 6 20 MM - Optimized for medium-sized clasps, perfect for your power tools and small engines.
QUICK EASY APPLICATION - Sets in just 10 minutes and fully cures in 24 hours—fast maintenance without downtime.
VIBRATION PROOF SECURITY - Locks threaded fasteners to stop loosening from vibration—no more unexpected breakdowns.

Loctite Threadlocker Blue 242 is a medium-strength thread sealant designed to lock and seal fasteners sized 6-20mm, preventing loosening from vibration. It protects against leaks, rust, and corrosion, cures fully within 24 hours, and is removable with standard hand tools—ideal for small motors, lawnmowers, and power equipment requiring reliable, maintenance-friendly fastening.

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$199.38

Duties & taxes included

In stock

Sold byAmazon British Virgin IslandsDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to British Virgin Islands.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Yusuf A.

Fantastic experience overall. Will recommend to friends and family.

1 month ago

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Great price for an authentic product. Fast international shipping too!

3 weeks ago

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Brand	LOCTITE
Model Number	209728-12
Product Dimensions	18.57 x 13.79 x 12.01 cm; 45.36 g
Color	Blue 242
Material	Thread Sealant
Quantity	1
Laser Class	Vibration
Are Batteries Included	No
Item Weight	45.4 g

Loctite スレッドロッカーチューブ

Details

Details

Description

Specifications

Common Questions