Household cleaning
Mr Muscle Oven Cleaner dupe
Why pay around £3.50 for Mr Muscle? The bulk active is Sodium hydroxide pearls 99% (caustic soda) — 97% less per working litre than a typical shelf pack.
From the retail pack to the active and the mix
1 · Retail
Mr Muscle Oven Cleaner
300 millilitres · £3.50 typical snapshot
Water, thickener, surfactant and propellant / trigger base
2 · Active
Sodium hydroxide (caustic soda)
4% on the label
1310-73-2NaOH
Bulk Sodium hydroxide pearls 99% (caustic soda)
3 · Mix
40 g/L (about 4% w/v working liquor)
£0.34 per working litre · 97% less than the shelf pack
- Active
- Sodium hydroxide (caustic soda)
- CAS
- 1310-73-2
- Dupe
- Sodium hydroxide pearls 99% (caustic soda)
- Saving
- 97% / L
Saving is per litre of working-strength mix versus a typical pack price, not versus the DIY kit total. Shop prices move — always check the listing.
Label teardown
What the pack promises versus what the label chemistry actually is.
The marketing claim
“Heavy-duty oven cleaner & degreaser”
The chemical reality
Another caustic gel with marketing. The attack on polymerised fats is sodium hydroxide. Dissolve caustic soda pearls to about 4% w/v and you get the same chemistry without the trigger-bottle tax.
Active vs filler
4% Sodium hydroxide (caustic soda) · 96% carrier / filler — Water, thickener, surfactant and propellant / trigger base
- Typical retail
- £3.50
- 300 millilitres
- Estimated active cost
- £0.10
- Scaled from bulk £8.50 / 1 kg
- Indicative markup
- 34.3×
- Snapshot maths, not a live shop price
The Marketing Claim & The Catch
A 300 millilitres pack of Mr Muscle Oven Cleaner typically retails around £3.50 in household cleaning. That is a UK shelf-price snapshot for the maths on this page — not a live shop quote or a manufacturer RRP. Listings, sizes and deals move. The marketing line is that you are buying a finished lifestyle product, not a weighed chemical.
On the pack: Heavy-duty oven cleaner & degreaser; No-scrub formula for burnt grease; and Fast-acting clean in about 30 minutes.
The catch: Another caustic gel with marketing. The attack on polymerised fats is sodium hydroxide. Dissolve caustic soda pearls to about 4% w/v and you get the same chemistry without the trigger-bottle tax.
- “Heavy-duty oven cleaner & degreaser”
- “No-scrub formula for burnt grease”
- “Fast-acting clean in about 30 minutes”
Proprietary Blend & Dosage Breakdown
The labelled active is Sodium hydroxide (caustic soda) at 4%. Everything else in the pack is water, thickener, surfactant and propellant / trigger base.
At 4% active, most of what you pay for is carrier and packaging. The brand is selling convenience, fragrance and a label — not a uniquely potent molecule.
Branded working strength is whatever comes out of the bottle. The bulk alternative is 99% Sodium hydroxide pearls 99% (caustic soda), mixed to 40 g/L (about 4% w/v working liquor).
- Labelled active
- Sodium hydroxide (caustic soda)
- 4%
- Carrier
- Water, thickener, surfactant and propellant / trigger base
- Retail pack
- 300 millilitres · £3.50
The Active Chemical Alternative (Dupe Stack)
The dupe stack is Sodium hydroxide pearls 99% (caustic soda) at 99% bulk. Indexed as CAS 1310-73-2, formula NaOH. Buy it as 1 kg for around £8.50 from Amazon UK.
Working strength: 40 g/L (about 4% w/v working liquor). Indicative cost £0.34 per diluted litre — 97% below a typical branded pack on a per-litre basis, before you reuse leftover bulk.
Follow the mixing method and the supplier SDS. Wear the listed PPE. Do not mix incompatible oxidisers, acids or ammonia.
- Causes severe burns. Splash goggles, household gloves, ventilation. Always add pearls to cold water — never water onto dry pearls.
- Dissolve 40 g of pearls in 1 litre of cold water in a plastic jug (~4% NaOH). Optionally thicken slightly with a pinch of wallpaper paste for vertical oven walls.
- Apply to a cold oven with a nylon brush. Dwell 20–40 minutes. Wipe and rinse copiously. Keep off aluminium, zinc, self-clean coatings you do not want etched, and skin.
- Never mix with acids or bleach. 1 kg makes about 25 litres of working liquor — dozens of 300 ml trigger bottles.
Dilution recipe
0.3 L working batch
Working strength 40 g/L (about 4% w/v working liquor). Educational estimate from the listed ratio — check the SDS before you mix.
Chemical
12 grams
Sodium hydroxide pearls 99% (caustic soda)
Water
0.3 litres
Carrier / diluent
0% concentrate · 100% water by working volume (solids are dissolved into the water share).
Required PPE
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Side-by-Side Price & Potency Comparison
Head-to-head comparison
| Measure | Retail brandedMr Muscle | Raw active dupeDupeStack |
|---|---|---|
| Product | Oven CleanerAmazon UK search — listing, not a confirmed seller | Sodium hydroxide pearls 99% (caustic soda) |
| Pack / unit | 300 millilitres · £3.50 | 1 kg · £8.50 |
| Active | Sodium hydroxide (caustic soda) at 4%Carrier: Water, thickener, surfactant and propellant / trigger base | 99% bulkNaOH |
| CAS number | Not disclosed on pack | 1310-73-2 |
| Working strength | Ready-to-use pack | Dilute 40 g/L (about 4% w/v working liquor) |
| Cost per litre | £11.67 / L typical pack | £0.34 / L mixed from bulk |
| Headline saving | Baseline | 97% cheaper |
| COSHH / PPE | Follow the branded SDS | Gloves. Chemical-resistant gloves (nitrile or neoprene)Eye protection. Indirect-vent splash goggles — not ordinary spectaclesVentilation. Use outdoors or with mechanical extractionAcid-resistant PPE. Apron and gloves rated for corrosive liquids |
Active ingredient and cheaper alternative — FAQ
Is this the same as Oven Pride?
Same primary molecule — sodium hydroxide — different packaging theatre. Oven Pride sells a bag kit; Mr Muscle sells a spray/gel. Bulk pearls cover both if you mix to roughly 4% and rinse thoroughly.
Can I spray caustic onto a hot oven?
No. Work on a cold oven only. Hot caustic spatters, fumes harder and can damage seals. Apply, dwell, wipe, rinse with plenty of water.
How do you mix the Oven Cleaner dupe stack?
Causes severe burns. Splash goggles, household gloves, ventilation. Always add pearls to cold water — never water onto dry pearls. Dissolve 40 g of pearls in 1 litre of cold water in a plastic jug (~4% NaOH). Optionally thicken slightly with a pinch of wallpaper paste for vertical oven walls. Apply to a cold oven with a nylon brush. Dwell 20–40 minutes. Wipe and rinse copiously. Keep off aluminium, zinc, self-clean coatings you do not want etched, and skin. Never mix with acids or bleach. 1 kg makes about 25 litres of working liquor — dozens of 300 ml trigger bottles.
DupeStack provides chemical concentration data and educational mixing guides only. Wellness pages compare food supplements, not medicines or prescribed treatments. Always review the supplier Safety Data Sheet (SDS) and comply with UK Health and Safety Executive (HSE) and COSHH regulations when handling concentrated substances. Mixing and storage are at your own risk. Some links are affiliate advertisements (Amazon Associates, eBay Partner Network, and Awin when those programmes are live). Commissions do not change listed concentrations or calculator output.
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£16.50Save 97% / L
Indicative DIY stack