Food-Grade Silicone
Durable, inert alternative to single-use plastic — but not biodegradable.
What it is
Silicone is a synthetic polymer built on a silicon–oxygen backbone made from quartz sand. Platinum-cured, food-grade silicone contains no fillers and is stable across a very wide temperature range.
Why it matters
It replaces cling film, sandwich bags and disposable bakeware with something that lasts years and doesn't leach the way soft plastics can. It is not compostable and almost never accepted kerbside, so lifespan is the whole argument.
Upsides
- Inert and stable from freezer to oven temperatures
- No BPA, phthalates or plasticisers
- Lasts years, replacing hundreds of disposables
- Doesn't fragment into microplastics the way soft plastics do
Trade-offs
- Not biodegradable and rarely recycled kerbside
- Cheap peroxide-cured silicone can contain fillers that leach
- Energy-intensive to produce
What to look for on the label
'Platinum-cured' or 'LFGB food grade', a pinch test (no white showing when twisted), and a take-back program for end of life.
Better or comparable alternatives
Compare food-grade silicone in a finished product
Material choice is only part of the decision. The same material can appear in very different products: compare composition, expected use and end-of-life options before treating it as a better replacement.
- Composition and sourcing
- Use the label guidance above to check the actual percentage of food-grade silicone, any blends, coatings or adhesives, and which component a certificate covers. A claim about one input does not describe the whole product.
- Use and maintenance
- Weigh the listed upsides and trade-offs against the job you need it to do. Check care instructions, repair options and whether a comparable item you already own could serve the same purpose.
- Disposal in your area
- Ask your local collection service about the finished item, not just its main material. Blends, coatings and attachments may change how it can be collected. Do not assume a recyclable or compostable claim applies to your household system.
Frequently asked
Is silicone a plastic?+
It is a synthetic polymer, but chemically distinct from carbon-based plastics — more stable, and it doesn't shed conventional microplastics.
How do I dispose of silicone?+
Not kerbside. Some manufacturers run mail-back programs; otherwise reuse it for as long as possible, which is the point of the material.