Thread locker and flux
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Thread locker
An anaerobic adhesive that cures in the absence of air and in the presence of metal. Which means the container has to let air in while keeping everything else out.
Which is why it is sold in those bottles
Permeable walls and a part-full bottle are design features rather than cheapness. A thread locker decanted into an airtight glass bottle will cure in storage.
So this is a leaf to be careful about
The honest advice for thread locker is usually to keep it in the container the manufacturer designed, and this catalog should say that rather than sell a glass bottle for it.
Flux
Rosin, water soluble or no-clean, as a liquid, paste or pen. Acidic in many formulations, hygroscopic in most, and the thing that decides whether a joint corrodes a year later.
Which makes the liner the specification
An acidic liquid against the wrong liner corrodes the closure from inside, and the first sign is a cap that will not come off. 373 continuous thread closures on this shelf and the liner is the variable.
Both are drop products
43 dropper assemblies here, at the 20-410 and 24-410 necks that dominate the shelf. For a drop of flux on a pad or a drop of locker on a thread, the dropper is the dispensing method.
And a dropper bulb has a chemistry problem
Elastomer against an acid or a solvent perishes, and the bulb goes before the bottle. A lined cap plus a separate pipette is the more durable answer.
Shelf life is the quiet failure
Both of these keep working badly rather than failing outright. A joint that corrodes or a fastener that comes loose six months later does not look like a packaging problem.
Which is an argument for small containers
Buy what you will use, in a size you will finish. The 115 containers at 30 mL or under on this shelf are the right end for both products.
Date them
Received date and opened date, on the bottle. For two products whose failure is slow and invisible, that is the only diagnostic anybody will have.