I received the 50ml bottle is not even has half the content inside. Is this right or should it be full bottle?

Being a past Loctite adhesive specialist, anaerobic adhesives cure in the absence of air. Filling the bottle would shorten the shelf life because of no air around the product. Also, the bottle is made of an air permiable plastic. This why old bottles get sticky, the product is weeping through the pore's of the bottle. 50 and 250 ml bottles are not round and are flat by design to discourage any curing of the product in the center of the liquid inside the bottle. Anaerobic adhesives cure upon assembly and do not air dry, this why any liquid product should be wiped away from the completely assembly because in the liquid state it will craze painted surfaces. Half filled bottles are very normal. You can dump the product out in to a measuring cup to verify the amount but you will find you are not getting ripped off. It all about packaging.

I was examining some spilled M-243 and it is still gummy after two weeks. Is this normal or should it be hard to the touch?

This is normal M-243 is like a light glue to hold the screw or bolt in place like pipe tape is for a watertight seal. I use it after cleaning my hunting rifle on the screws during the re-assembly process. Hope this helps.

can I use this on a .125 inch set screw?

Yes. M-243 can be used on a 1/8 set screw. If possible, apply the threadlocker to both male and female threads before installing the set screw.

Does this prevent seizing and galling? (anti-seizing)

To the best of my knowledge, seizing and galling occur when two surfaces are rubbing against each other (by design e.g. shaft and bushing), but for some reason (e.g. lack of lubrication) will eventually destroy each other (causing seizing and galling). So I don't think this will help prevent seizing and galling in that sense as it would not be used as a lubricant. It is possible that it prevents corrosion in certain materials e.g. steel bolts and nuts. But that needs to be verified.

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Description

🔧 Lock it down, loosen it up—thread security made smart.

REMOVABLE YET RELIABLE - Blue thread locker offers strong hold but allows easy disassembly with tools—no heating required.
RUST LEAK DEFENSE BUILT IN - Anaerobic curing seals and protects metal fasteners from rust, corrosion, and leakage.
UNIVERSAL FIT FOR ALL YOUR GEAR - Perfect for metal screws below M32—automobiles, bikes, appliances, and industrial equipment.
SECURE YOUR FASTENERS WITH CONFIDENCE - Locks nuts & bolts tight to prevent loosening from vibration or shock, even in extreme conditions.
PRECISION APPLICATION LONG TERM PERFORMANCE - Peak nozzle design ensures mess-free, controlled application and maintains adhesive potency.

ESKONKE Blue Thread Locker 243 is a medium-strength anaerobic adhesive designed to lock and seal metal fasteners securely. It cures fully in 24 hours, providing waterproof, corrosion-resistant protection while allowing easy disassembly with tools. Ideal for a wide range of applications from automotive to household appliances, it ensures long-lasting, vibration-resistant fastening with precise, mess-free application.

Specifications

Brand	ESKONKE
Specific Uses For Product	Lock Tight Fasteners, Lock Tight Nuts Bolts, Seal Fasteners
Material	Epoxy Acrylate(60-65%) / Oleic acid, ethoxylated(25-30%)
Item Form	Liquid
Special Feature	Anaerobic adhesive, blue thread locker 243, metal glue, thread lock nuts bolts, thread locker 243
Color	Blue
Item Package Quantity	1
Package Information	Bottle
Item Volume	1.69 Fluid Ounces
Viscosity	1300~3000 cP
Full Cure Time	24 Hours
Water Resistance Level	Waterproof
Tensile Strength	180 PSI
Unit Count	1.69 Fluid Ounces
UPC	788462034992
Number of Pieces	1
Manufacturer	ESKONKE
Item Weight	2.12 ounces
Product Dimensions	6.3 x 2.36 x 1 inches
Item model number	243
Manufacturer Part Number	‎TL21-S002R
Special Features	Anaerobic adhesive, blue thread locker 243, metal glue, thread lock nuts bolts, thread locker 243

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