# DupeStack

> Deconstruct the brand. Buy the molecule.

**DupeStack** — a UK consumer-advocacy site Phil Stone built to strip branded household, garden, pool and wellness products back to the bulk chemicals that actually do the work.

Most of what you pay for in a patio cleaner, lawn feed or pool tub is packaging, perfume and a television advert. The active is often a commodity salt or acid you can buy by the kilogram. DupeStack names that molecule, shows the maths, and points to a DIY stack — without pretending to be a chemist on your doorstep.

## Why Phil built it

Phil sells natural stone for a living. Customers ask what actually cleans algae off sandstone, what won't etch limestone, and why one branded bottle costs five times another with the same CAS number on the SDS. The honest answer is usually "same chemistry, different label."

DupeStack is an attempt to write that down properly: one teardown per branded pack, one bulk active, one dilution ratio, one savings figure per working litre. Not influencer hacks — CAS numbers, mixing notes and UK COSHH-minded handling.

## What it does

- **Teardowns** — marketing claim, labelled active, bulk dupe, side-by-side price and potency, FAQ, DIY stack via Amazon UK search links
- **Dilution calculator** — fill a sprayer or cover a measured area; concentrate, water, batch cost and savings vs the branded pack
- **Category hubs** — patio & exterior, lawn & garden, household cleaning, pool & spa, wellness & supplements (supplements only — not medicines)
- **Honest savings** — per working litre; prices are snapshots; the chemistry is the point

61 teardowns live at time of writing. Strict rule: no duplicate DIY stacks.

## What it is not

- Not medical or veterinary advice
- Not a substitute for the manufacturer SDS or HSE/COSHH compliance
- Not a shop — affiliate links may earn commission; the maths is independent

## Links

- Site: https://dupestack.co.uk
- Teardowns: https://dupestack.co.uk/teardowns/
- Calculator: https://dupestack.co.uk/calculator/
- Contact: hello@dupestack.co.uk
- Intro on Phil's site: https://philstone.co.uk/dupestack.html

## Related on philstone.co.uk

- [Natural stone](https://philstone.co.uk/natural-stone.md) — stone sales; where many teardown questions start
- [STOCut](https://philstone.co.uk/stocut.md) — sheet cutting plans
- [Todayworks](https://philstone.co.uk/todayworks.md) — UK site diary

Builder: Phil Stone — https://philstone.co.uk/