Patio & exterior

Retail pack

£34.005 litres

Raw active

Benzalkonium chloride (BAC 50)68424-85-1

A dilute quaternary ammonium biocide sold as a lifestyle patio product. The active is commodity BAC 50; the brand is paying for the trigger bottle and the television advert.

Retail pack

£24.995 litres

Raw active

Benzalkonium chloride (BAC 50)68424-85-1

Another BAC patio biocide in a different coloured bottle. Same quaternary ammonium as Wet & Forget; same bulk drum of BAC 50. You are paying for the brand, not a different molecule.

Retail pack

£8.50500 millilitres

Raw active

Oxalic acid dihydrate6153-56-6

Oxalic acid is the classic rust and tannin bleach for masonry. HG bottles a dilute solution; a kilogram of crystals makes tens of litres of the same chemistry.

Retail pack

£24.995 litres

Raw active

Sodium hypochlorite 14–15% (industrial / dairy grade)7681-52-9

Standard commercial bleach solution sold at five times agricultural merchant prices.

Retail pack

£16.505 litres

Raw active

Technical hydrochloric acid 32–36%7647-01-0

Retail brick acid is technical hydrochloric acid cut to about 9%. 5 litres of 36% acid plus 15 litres of water is 20 litres of the same working strength.

Retail pack

£36.005 litres

Raw active

Water-based silane/siloxane masonry impregnator (50%)2943-75-1

A dilute siloxane in a 5 litre tin. Trade water-based silane/siloxane concentrates at 50% dilute 1+9 to about 5% working sealer — same job, more litres, less solvent perfume.

Retail pack

£11.992.5 litres

Raw active

Spirit vinegar 25% (acetic acid)64-19-7

The ‘organic patio cleaner’ is about 18% acetic acid with a drop of sugar-derived surfactant. Dilute 1:3 and you have ~4.5% vinegar. Spirit vinegar at 25% is the same molecule in a 5 litre jerry.

Retail pack

£8.99500 millilitres

Raw active

Phosphoric acid 81% (food / technical) diluted to ~25%7664-38-2

This is not oxalic (that is HG masonry rust) and it is not hydrochloric (Mortar Clen). Phosphoric acid etches rust to iron phosphate. Technical 81% phosphoric diluted to about 25% is the same attack without the gel tax. Keep it off limestone.

Retail pack

£16.004 litres

Raw active

Didecyldimethylammonium chloride (DDAC 50)7173-51-5

This is not old Jeyes Fluid (tar acids are gone). Patio Power is 1.75% DDAC — a twin-chain quat, not the benzalkonium in Patio Magic. Dilute DDAC 50 to about 0.35% and you have the same working spray as the 4 L bottle mixed 1+4.

Retail pack

£14.005 litres

Raw active

Sodium metasilicate pentahydrate10213-79-3

This is not Patio Magic (BAC) and it is not Mortar Clen (HCl). KilrockPRO is a dilute alkaline masonry degreaser — disodium metasilicate (CAS 6834-92-0) with soda ash and a chelator. Metasilicate pentahydrate crystals mixed at about 30 g/L match the bottle strength; then dilute 1:20 for light stains as the pack does.

Retail pack

£33.005 litres

Raw active

Tetrapotassium pyrophosphate (TKPP)7320-34-5

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.

Retail pack

£18.001 litre

Raw active

Benzyl alcohol100-51-6

A viscous sealer stripper whose SDS lists benzyl alcohol at roughly 30–50%. Bulk benzyl alcohol is the same solvent that softens wax and acrylic films so you can scrub and wet-vac them off — not a biocide and not brick acid.

Retail pack

£29.995 kg tub

Raw active

Sodium percarbonate (technical oxygen bleach)15630-89-4

Logco’s Eco patio powder is sodium percarbonate (CAS 15630-89-4) — the same solid peroxide adduct as Vanish Oxi, sold as a 5 kg outdoor tub. Fifty grams per litre of warm water is the deck/patio band (about 5 m²/L). It is not BAC, not DDAC and not hypochlorite. A technical 5 kg sack is the same oxidiser without the decking label.

Retail pack

£16.56250 millilitres

Raw active

Low-aromatic C9–C10 white spirit plus fuller’s earth poultice64742-49-0

Lithofin OIL-EX is a solvent poultice, not an alkaline degreaser. The GB SDS lists C9–C10 hydrocarbons (CAS 64742-49-0) at 60–65%, C9 aromatics (CAS 64742-95-6) at 15–20%, and d-limonene (CAS 5989-27-5) at 0.5–1% in an absorbent paste. It is not KilrockPRO metasilicate, not LTP Grimex TKPP, and not Solvex benzyl alcohol. Low-aromatic white spirit plus fuller’s earth is the same solvent-and-absorb job without the 250 ml tube tax.

Retail pack

£43.801 litre

Raw active

Lithofin Stainstop PLUS (same siloxane impregnator, 5 litre tin)69430-37-1

Not Thompson’s water-based silane. The GB SDS for Lithofin Stainstop PLUS lists an amino-functional dimethyl siloxane (CAS 69430-37-1) at 15–20% in hydrocarbon solvent, plus a trace of methanol. It sinks in and darkens absorbent stone. Pro Tiler Tools lists the same tin at £43.80 for 1 litre and £202.20 for 5 litres (inc VAT) — about £40 a litre in the big tin, an 8% tin-size gap, not a stronger molecule.

Retail pack

£19.995 litres

Raw active

2-Butoxyethanol (butyl glycol, 99%+)111-76-2

Traffic film removers are a glycol-ether solvent (2-butoxyethanol, CAS 111-76-2) plus alkali and surfactant. The 5 litre Bilt Hamber bottle lists butyl glycol as the active solvent — a common TFR formulation across the industry. A 25 litre drum of 2-butoxyethanol from a lab supplier diluted with sodium hydroxide and surfactant is the same working chemistry at a fraction of the branded price per litre.