Red threadlocker/loctite

[Greenlight]

Use a torch to heat them up. This softens the Loctite, and it cleans off easily.

Or soak in acetone for a few minutes. This does the same thing.

[Jeff Niceswanger]

Originally Posted by Greenlight

Use a torch to heat them up. This softens the Loctite, and it cleans off easily.

Or soak in acetone for a few minutes. This does the same thing.

Told by salesman at the plant decades ago? that the # of the Loctite originally (like 242) was the temp at which it turned soft. Anybody heard of this?
EDIT...
I asked AI

No, the number in a Loctite product name does not represent the temperature at which it softens. While heat is used to aid in the disassembly of some Loctite products, the product numbers relate to factors like strength, viscosity, and application type.
Here is how to interpret the Loctite naming system:
Color: The color of the Loctite is the primary indicator of its strength.
Purple (222): Low strength, used for small fasteners.
Blue (242, 243): Medium strength, allows for normal disassembly with hand tools.
Red (262, 271, 277): High strength, considered a permanent solution that requires localized heat to remove.
Green (290): Medium-to-high strength with low viscosity, designed for wicking into preassembled fasteners.
Number: The actual number, such as 242 or 277, indicates the adhesive's specific characteristics, such as viscosity, oil resistance, and maximum fastener size.
Temperature: The maximum operating temperature is a key specification found on the product's technical data sheet (TDS), not in the product number itself. For example, Loctite 242 (blue) has a temperature range of -65?F to 300F.

How to use heat for removal
Some Loctite compounds soften under high heat, which is a required removal method for high-strength (red) threadlockers.
Red (High-Strength): To remove red threadlockers, you must apply localized heat greater than 550F (250C) with a torch before disassembling with hand tools.
Blue (Medium-Strength): Blue threadlocker is designed to be removed with standard hand tools. However, if the fastener is particularly stubborn due to a longer engagement length, localized heat can also be applied to help loosen the bond.