Guys, it's not 1978. There are at least 15 different Loctite thread-locking agents now and color alone doesn't fully define them.
For small set-screws in an adjustable comb, you want Loctite 220 or 222. If it makes you feel good, the 220 is blue and the 222 is purple. The latter allows easier removal.
If you do not want to put lock-tite on screw, if there is room, tighten set screw and then put a second set screw in and tighten it. Easy to remove when needed.
Non setting PTFE paste works well. Also known as thread sealant for pipe fittings. A little dab will do ya and you can easily loosen the set screws when you want. A small tube can be bought at your local hardware store for under five bucks and will last forever - you might even find yourself using it around the house on minor plumbing jobs.
Don't just put a band-aid on it that won't last! Re-do the comb with good quality hardware that won't come loose. There are several choices to choose from. If you need my assistance please call me.
I have a Browning which always came loose. I took 1 screw out and went to local Ace Hsrdware. Showed clerk screw and asked if they had a longer one. Screw was metric and they had longer one. Problem sovled. Good Luck.
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