Patio & exterior
LTP Grimex Intensive Cleaner dupe
Why pay around £33.00 for LTP? The bulk active is Tetrapotassium pyrophosphate (TKPP) — 86% less per working litre than a typical shelf pack.
From the retail pack to the active and the mix
1 · Retail
LTP Grimex Intensive Cleaner
5 litres · £33.00 typical snapshot
Water, dipropylene glycol methyl ether, non-ionic surfactant and dilute ammonia
2 · Active
Tetrapotassium pyrophosphate (TKPP)
2% on the label
7320-34-5K4P2O7
Bulk Tetrapotassium pyrophosphate (TKPP)
3 · Mix
20 g/L (≈ bottle builder strength), then 1:5–1:20 for light wash
£0.28 per working litre · 86% less than the shelf pack
- Active
- Tetrapotassium pyrophosphate (TKPP)
- CAS
- 7320-34-5
- Dupe
- Tetrapotassium pyrophosphate (TKPP)
- Saving
- 86% / 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 grime, grease and old wax remover for stone and tiles”
The chemical reality
Not a patio biocide (BAC/DDAC) and not brick acid. LTP’s 2025 SDS lists tetrapotassium pyrophosphate (~1–3%) with glycol ether and a little ammonia — a phosphate-builder scrub for grease and old wax. TKPP crystals at about 20 g/L match the bottle’s builder strength; then dilute as the pack does.
Active vs filler
2% Tetrapotassium pyrophosphate (TKPP) · 98% carrier / filler — Water, dipropylene glycol methyl ether, non-ionic surfactant and dilute ammonia
- Typical retail
- £33.00
- 5 litres
- Estimated active cost
- £1.40
- Scaled from bulk £14.00 / 1 kg
- Indicative markup
- 23.6×
- Snapshot maths, not a live shop price
The Marketing Claim & The Catch
A 5 litres pack of LTP Grimex Intensive Cleaner typically retails around £33.00 in patio & exterior. 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 grime, grease and old wax remover for stone and tiles; Interior and exterior paving, driveways and terracotta; and Intensive cleaner before resealing.
The catch: Not a patio biocide (BAC/DDAC) and not brick acid. LTP’s 2025 SDS lists tetrapotassium pyrophosphate (~1–3%) with glycol ether and a little ammonia — a phosphate-builder scrub for grease and old wax. TKPP crystals at about 20 g/L match the bottle’s builder strength; then dilute as the pack does.
- “Heavy-duty grime, grease and old wax remover for stone and tiles”
- “Interior and exterior paving, driveways and terracotta”
- “Intensive cleaner before resealing”
Proprietary Blend & Dosage Breakdown
The labelled active is Tetrapotassium pyrophosphate (TKPP) at 2%. Everything else in the pack is water, dipropylene glycol methyl ether, non-ionic surfactant and dilute ammonia.
At 2% 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 100% Tetrapotassium pyrophosphate (TKPP), mixed to 20 g/L (≈ bottle builder strength), then 1:5–1:20 for light wash.
- Labelled active
- Tetrapotassium pyrophosphate (TKPP)
- 2%
- Carrier
- Water, dipropylene glycol methyl ether, non-ionic surfactant and dilute ammonia
- Retail pack
- 5 litres · £33.00
The Active Chemical Alternative (Dupe Stack)
The dupe stack is Tetrapotassium pyrophosphate (TKPP) at 100% bulk. Indexed as CAS 7320-34-5, formula K4P2O7. Buy it as 1 kg for around £14.00 from Amazon UK.
Working strength: 20 g/L (≈ bottle builder strength), then 1:5–1:20 for light wash. Indicative cost £0.28 per diluted litre — 86% 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.
- Eye irritant / alkaline scrub. Nitrile gloves and splash goggles. Work outdoors. Always add powder to water. Never mix with bleach or acids.
- Dissolve 20 g of TKPP per litre of warm water to land near the branded concentrate’s phosphate-builder band (SDS ≥1–<3% TKPP).
- Light maintenance: dilute that liquor 1:10–1:20, mop or brush, rinse. Heavy grime / old wax: use nearer neat liquor, scrub, rinse thoroughly. Neutralise residual alkalinity with a water rinse before resealing.
- Optional: a small measured dose of dipropylene glycol methyl ether improves grease cut — only if you have that SDS and PPE.
- 1 kg at 20 g/L makes 50 litres of bottle-strength liquor. Keep off polished soft metals if unsure; test a tile first.
Dilution recipe
5 L sprayer
Working strength 20 g/L (≈ bottle builder strength), then 1:5–1:20 for light wash. Educational estimate from the listed ratio — check the SDS before you mix.
Chemical
100 grams
Tetrapotassium pyrophosphate (TKPP)
Water
5 litres
Carrier / diluent
0% concentrate · 100% water by working volume (solids are dissolved into the water share).
Required PPE
Loading calculator…
Side-by-Side Price & Potency Comparison
Head-to-head comparison
| Measure | Retail brandedLTP | Raw active dupeDupeStack |
|---|---|---|
| Product | Grimex Intensive CleanerAmazon UK search — listing, not a confirmed seller | Tetrapotassium pyrophosphate (TKPP) |
| Pack / unit | 5 litres · £33.00 | 1 kg · £14.00 |
| Active | Tetrapotassium pyrophosphate (TKPP) at 2%Carrier: Water, dipropylene glycol methyl ether, non-ionic surfactant and dilute ammonia | 100% bulkK4P2O7 |
| CAS number | Not disclosed on pack | 7320-34-5 |
| Working strength | Ready-to-use pack | Dilute 20 g/L (≈ bottle builder strength), then 1:5–1:20 for light wash |
| Cost per litre | £6.60 / L typical pack | £0.28 / L mixed from bulk |
| Headline saving | Baseline | 86% 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 extraction |
Active ingredient and cheaper alternative — FAQ
Is Grimex the same as Patio Magic or KilrockPRO?
No. Patio Magic is BAC for algae film. KilrockPRO is metasilicate for oily concrete. Grimex is a TKPP / glycol-ether stone scrub for grime and old wax before resealing. Different job, different salt (CAS 7320-34-5).
Does the DIY stack include the ammonia and glycol ether?
The weighable unique builder is TKPP. The branded jerry also carries dipropylene glycol methyl ether and dilute ammonia. For heavy grease you can add a splash of DPGME / ‘Dowanol’-type glycol ether to the TKPP liquor — read that SDS too. Do not mix with bleach or acids.
How do you mix the Grimex Intensive Cleaner dupe stack?
Eye irritant / alkaline scrub. Nitrile gloves and splash goggles. Work outdoors. Always add powder to water. Never mix with bleach or acids. Dissolve 20 g of TKPP per litre of warm water to land near the branded concentrate’s phosphate-builder band (SDS ≥1–<3% TKPP). Light maintenance: dilute that liquor 1:10–1:20, mop or brush, rinse. Heavy grime / old wax: use nearer neat liquor, scrub, rinse thoroughly. Neutralise residual alkalinity with a water rinse before resealing. Optional: a small measured dose of dipropylene glycol methyl ether improves grease cut — only if you have that SDS and PPE. 1 kg at 20 g/L makes 50 litres of bottle-strength liquor. Keep off polished soft metals if unsure; test a tile first.
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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£32.00Save 86% / L
Indicative DIY stack