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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Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

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Loctite Threadlocker Blue 242 - Removable Thread Lock Glue for Nuts, Bolts, & Fasteners, Medium Strength Screw Glue to Prevent Loosening & Corrosion - 6 ml, 1 Pack

Product ID: 1998117

Details

Brand
Loctite
Item Form
Liquid
Material
ester
Special Feature
Strong
Specific Uses For Product
Threadlocker

🔒Medium strength lock for 6-19mm fasteners

⏱️Sets in 10 minutes, cures in 24 hours

🛡️Prevents rust, corrosion & leaks

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₱1079

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Sold byAmazon PhilippinesDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔧 Lock it down, loosen up later — the smart fix for every fastener!

VERSATILE FIT - Perfect for 6-19mm fasteners on motors, mowers, and power equipment—your go-to maintenance essential
RUST LEAK DEFENSE - Protects metal threads from corrosion and fluid leaks, extending equipment life
FAST EFFICIENT CURE - Ready to handle stress in just 24 hours with a quick 10-minute set time
REMOVABLE WHEN NEEDED - Medium strength formula allows easy disassembly with hand tools—no damage, no hassle
VIBRATION PROOF SECURITY - Locks nuts & bolts tight to stop loosening from machine shake

Loctite Threadlocker Blue 242 is a medium-strength adhesive designed to lock and seal metal fasteners sized 6-19mm, preventing loosening caused by vibration. It sets quickly in 10 minutes and fully cures in 24 hours, offering robust protection against rust, corrosion, and leaks. Ideal for small motors, mowers, and power equipment, it allows easy removal with hand tools, combining durability with serviceability.

Specifications

ASIN	B000I1RSNS
Best Sellers Rank	#45 in Automotive ( See Top 100 in Automotive ) #1 in Thread Lock Sealers
Brand Name	Loctite
Color	Blue
Compatible Material	Metal
Container Type	Tube
Customer Reviews	4.8 4.8 out of 5 stars (42,678)
Full Cure Time	24 Hours
Global Trade Identification Number	00079340242005
Included Components	Loctite Heavy Duty Threadlocker, 0.2 oz, Blue 242, Single
Item Form	Liquid
Item Package Quantity	1
Item Type Name	Blue 242
Item Weight	5 Grams
Manufacturer	Henkel Corporation
Material Type	Dimethylacrylate ester
Model	Henkel / osi -tanch-it-
Number of Pieces	1
Other Special Features of the Product	Strong
Part Number	209728
Specific Uses For Product	Threadlocker
Tensile Strength	110 Pounds Per Inch
UPC	079340242005
Unit Count	1.0 Count
Viscosity Level	Medium
Volume	6 Milliliters
Warranty Description	Warranty
Water Resistance Level	Water Resistant

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