Decanting

Decanting glue and epoxy

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Why anybody decants glue And cyanoacrylate cures on moisture So the bottle has to be dry and tight Epoxy is two parts and a clock And the hardener is the aggressive half The transfer is what the labeling rule is about Mark the ratio on the bottle Resin compatibility, as always Which usually lands on glass or HDPE Test the cure, not the fill References

Cyanoacrylate and epoxy both cure in the bottle you put them in.

Why anybody decants glue

A large bottle of cyanoacrylate is unusable at the bench: it thickens, the nozzle blocks, and the whole bottle goes off after being opened a few times. Small working quantities are the point.

And cyanoacrylate cures on moisture

Which includes the moisture in the air and in the bottle you decanted it into. A container that was washed and not dried is a container of cured glue.

So the bottle has to be dry and tight

A lined closure, minimal headspace and a resin that does not breathe. This is one product where a cheap bottle costs more than the glue.

Epoxy is two parts and a clock

Resin and hardener stored separately, which is two containers, two labels and a mixing ratio that has to survive the transfer. Decanting both halves into unmarked bottles is how a batch fails to cure.

And the hardener is the aggressive half

Amine hardeners are hard on resins and on skin, and they are the sensitizer in the pair. The container choice and the label both follow the hardener rather than the resin.

The transfer is what the labeling rule is about

Both of these are transfers from a labeled container into a portable one. The exemption covers immediate use by the person who poured it, and a decanted epoxy half that lives on a shelf is outside it.

Mark the ratio on the bottle

Not in a notebook. A decanted pair with no ratio written on them is two bottles of waste the first time somebody else uses them.

Resin compatibility, as always

"Chemical resistance is the entire decision, check the resin chart first." PET is 390 of the 750 containers here and is not the answer for most of these products.

Which usually lands on glass or HDPE

127 glass and 156 HDPE on this shelf. The archetype names those two for a reason, and the 68 glass Boston rounds are the obvious small format.

Test the cure, not the fill

Fill a unit, leave it a month, and then try to use it. Both of these products fail in storage rather than at the moment of transfer.

References

29 CFR 1910.1200(f)(8): "The employer is not required to label portable containers into which hazardous chemicals are transferred from labeled containers, and which are intended only for the immediate use of the employee who performs the transfer." Paragraph (f)(6) sets what a workplace container carries otherwise: either the full label information, or the product identifier plus "words, pictures, symbols, or combination thereof, which provide at least general information regarding the hazards of the chemicals" and which work together with the rest of the hazard communication program. osha.gov

The archetype behind this shelf is ind-chemical: 100 to 20,000 mL, narrow mouth, HDPE and glass, light sensitive, child resistant, poured, with "chemical resistance is the entire decision, check the resin chart first" as its stated reason. All nine leaves sit on it, including the three that store dry consumable parts rather than a liquid.

The Davis Pack Supply catalog, measured 18 October 2026. The shop consumables shelf is 1,389 rows: 750 containers and 639 closures. 10 mL to 9,464 mL with a median of 120; 85 containers over a pint, 23 over a quart, 3 over a gallon and none over five gallons. 390 PET, 156 HDPE, 127 glass, 76 PP and 1 LDPE, and no metal containers or safety cans. Of the 127 glass containers, 6 are over a pint. 510 bottles, 219 jars, 16 tubs and pails, 4 jugs. 134 amber or dark amber. Closures: 373 continuous thread, 43 dropper assemblies, 39 child resistant, 36 disc top, 27 dome lids, 26 spouted, 19 flip top, 19 lug and twist, 14 phenolic, 7 buttress.

Written from 29 CFR 1910.106(d)(2) and Table H-12, 29 CFR 1910.1200(f) and Appendix B Table B.6.1, and from the catalog as it stood on 18 October 2026. Nothing here establishes that a container is an approved container for flammable liquid storage, which is a word the regulation uses and our data does not support. Fire codes, state plans and insurers sit on top of all of this.