What is E904 shellac, and why is it on your sweets?
E904 shellac is a resin secreted by the female lac bug (Kerria lacca) on trees in India and Thailand. It is used as a glazing agent to give sweets, chocolate coatings, coated pills and fresh apples a hard shine. It is not vegan, and it is often labelled as "confectioner’s glaze" rather than shellac.
Where shellac comes from
The lac bug, Kerria lacca, feeds on the sap of certain trees in India and Thailand and secretes a resin that hardens into a protective shell on the branch. That resin is scraped off, processed and refined into shellac.
Insects are killed in the process. They are embedded in the harvested resin and are removed during refining. This is why shellac is not vegan, and why "it's only a secretion, like honey" does not hold as an argument.
Shellac has a long industrial history well beyond food. It was the material 78 rpm records were pressed from, and it remains a wood finish, a pharmaceutical tablet coating and a nail-product ingredient.
The names it hides behind
This is where shellac beats carmine for sheer evasiveness. On a food label it can appear as:
- E904: the additive code
- Shellac
- Confectioner's glaze
- Confectioner's resin
- Resinous glaze
- Candy glaze
- Pure food glaze
- Natural glaze
"Natural glaze" is the one to pause on. It appears on products aimed squarely at people trying to eat fewer synthetic additives, and it means lac-bug resin. Nothing about the phrase is a lie. It is simply relying on you to fill in the wrong meaning.
What it is used for
Shellac's job is a hard, glossy, moisture-resistant coating:
| Product | Why shellac is there |
|---|---|
| Coated chocolate sweets | Stops the shell melting on your fingers and adds shine |
| Jelly beans | The glass-like surface stops them sticking together |
| Chocolate-coated nuts and raisins | Gloss and moisture barrier |
| Fresh apples and citrus | Restores shine lost when the natural wax is washed off |
| Coffee beans | Some glazed beans |
| Pharmaceutical tablets | Enteric coating that survives stomach acid |
| Chewing gum | Coating on some coated gums |
The waxed apple deserves a specific mention. Commercial apples are washed after harvest, which strips their natural waxy cuticle, then re-coated to prevent moisture loss. That coating may be shellac, carnauba or beeswax, and loose fruit rarely carries an ingredient list at all.
Is shellac vegan?
No. Insects are killed in production, and every mainstream vegan standard excludes it.
Carnauba wax (E903) is the direct plant-derived substitute. It comes from the leaves of the Brazilian carnauba palm, does the same glazing job, and is increasingly used because manufacturers want a vegan-friendly option.
Is shellac halal?
Positions differ more here than with carmine, and the reason is worth setting out.
The argument for permissibility is that shellac is a secretion rather than the body of the insect, which makes it analogous to honey. The argument against is that insect bodies are unavoidably present in the harvested resin and are removed only during refining.
Several halal certifiers accept refined shellac; others do not. If this matters to you, check with the certifying body you follow rather than assuming either way.
Is shellac safe?
Generally regarded as safe, and it is a large, inert molecule that mostly passes through the digestive system unchanged. EFSA has evaluated it and it remains approved.
The reasonable objection to shellac is not toxicological. It is that a great many people are eating an insect product without knowing it, because the label says "natural glaze".
Checking for it
Because the alias list is long and the phrasing is deliberately soothing, this is a good candidate for scanning rather than reading. A barcode scan returns the additives by name and code; the ingredient scan reads the printed list directly when the product is not catalogued.
Frequently asked
Is confectioner’s glaze the same as shellac?
Yes. Confectioner’s glaze, resinous glaze, candy glaze, pure food glaze and "natural glaze" are all names for shellac (E904), the resin secreted by the lac bug.
Is the wax on apples shellac?
It can be. Commercial apples are washed after harvest, which removes their natural cuticle, then re-coated. The coating may be shellac (E904), carnauba wax (E903) or beeswax (E901). Loose fruit usually carries no ingredient list, so ask the retailer or buy unwaxed.