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Wax melts
All Containers›Shop by use case›Wax melts›The pour›Fill temperature, and half this shelfShop all wax melts →
The pour

Fill temperature, and half this shelf

By Dwight Davis, Founder

Updated

On this page8
Half the containers on this shelf cannot take a normal wax pour, and the catalog says so if you read the material data.

The three numbers

The material data behind this shelf gives a maximum fill temperature of 120 F for PET, 240 F for PP and 300 F for glass. Those are the figures the catalog itself carries, not an estimate, and they sort this shelf into two very unequal halves.

What a wax pour actually is

Soy blends are commonly poured well above 120 F and paraffin higher again, with the exact figure depending on the wax and on how you are managing the surface. Your own pour temperature is a number you already know, and it is the one to compare.

So PET is the wrong default here

112 of the 224 containers on this shelf are PET, which makes it the largest group and the least suited to the job. That is an unusual shape for a shelf and it is the main reason this page exists.

PP and glass are the working half

70 PP and 42 glass, 112 containers between them, all rated above any normal pour. The PP tubs and jars are the cheap route and the glass straight-sided jars the presentable one.

Deformation is not always obvious

A jar can take a hot pour and come out slightly out of round, slightly shorter, or with a neck that no longer takes its lid cleanly. That passes a glance and fails at capping, which is the worst place to find it.

Test with the actual wax at the actual temperature

Not with hot water. Pour three jars at your real temperature, let them set, then cap them and check the fit. It costs three jars and it settles the single question that matters most on this shelf.

This is the field to read first on any container page

Material and maximum fill temperature are published on every container here, and on this shelf they matter more than capacity, color or price. Reading them first turns a 224-item shelf into a short list in one pass.

References

16 CFR 500.7, Net quantity of contents, method of expression, which requires the declaration to be in fluid measure if the commodity is liquid and in weight or mass if it is solid, semi-solid or viscous, unless a firmly established general consumer usage and trade custom says otherwise. law.cornell.edu
Written from federal regulation and from the catalog’s own material data, not from a pouring bench. Net quantity rules are federal and state weights and measures officials enforce their own programs alongside them. Anything here is a starting point rather than clearance for a specific label.