Bilt Hamber

Bilt Hamber Laboratories are a British manufacturer based in Essex, and they are the most evidence-driven company in car care. Not the loudest, not the best marketed — the one that publishes safety data sheets naming actives at CAS level, commissions independent university salt-spray studies, and quotes durability as a wash count instead of a vague number of months.

That is why we stock them. Alpha Details is run by a chemist, and Bilt Hamber is the brand that gives a chemist something to actually read.

What makes Bilt Hamber different

They tell you what's in the bottle. Korrosol and Auto-Wheel both declare sodium mercaptoacetate — sodium thioglycolate, CAS 367-51-1 — at 15–25% and 10–30% respectively. Atom-Mac declares an amine carboxylate at 20–35% that resolves to morpholinium octanoate, textbook vapour-phase corrosion inhibitor chemistry. Touch-Less declares its alkyl polyglucoside surfactants by CAS number, which means the "sugar-based" claim on the label is literally true rather than a marketing flourish. Most brands in this industry disclose nothing.

They test, and they publish. Dynax S50 was put through a 2000-hour cyclic salt spray test at the University of Hertfordshire, based on ASTM B117-03, at matched film thickness against six competitors including Mike Sanders and Waxoyl. It came first. The full report is public. It was commissioned by Bilt Hamber — we'll say that plainly, because you should weigh it — but it is still more hard evidence than the rest of the anti-corrosion category has ever put on a table.

They get the pH right for the job, not for the marketing. Auto-Wheel is a reactive wheel cleaner at pH 5.5–7.0 — neither acid nor caustic — and it still outperforms products that are both. That is a formulation flex, not a compromise.

Where to start

If you want the best pre-wash chemistry available. Touch-Less is the one to buy, and it is Bilt Hamber's best seller for good reason: alkyl polyglucoside surfactants derived from glucose, corrosion inhibitors built in, no caustic, no phosphates, no solvents, and a mild pH 10.5. If your car is genuinely filthy or neglected, step up to Auto-Foam at pH 13 instead — Bilt Hamber's own guidance is Surfex-HD for greasier films, Auto-Foam for drier ones.

If you only buy one bottle. Surfex-HD. It works from 1:200 for interiors right through to neat for engine bays — a genuine 200-fold dilution range, held together by an HEDP chelant that keeps it performing in hard water. A 5L makes 500 litres of light-duty solution.

If you're decontaminating paint. Korrosol first, then Auto-Clay. Korrosol chelates the embedded iron chemically so your clay bar isn't dragging ferrous particles across your clear coat — and Auto-Clay is the only clay bar we know of that needs nothing but tap water as lubricant, because it contains no surfactants, detergents or soaps at all.

If you're fighting rust. This is where Bilt Hamber are untouchable, and where almost nobody in Australia stocks them properly. Deox-C is a crystalline 100% active bath — 1kg makes 20 litres — that strips corrosion without attacking sound steel. Deox-Gel does the same job on anything too big to submerge. Atom-Mac stops the flash rust afterwards, protecting steel it never physically touches. Then Dynax S50 into the cavities, Dynax UB on the underbody, and Dynax UC anywhere the finish needs to stay visible.

If you want carnauba done properly. All three Bilt Hamber waxes are built on T1 carnauba — the top Brazilian grade, "Prime Yellow," maximum 0.2% ash and a minimum 83°C melting point. Finis-Wax is the hard film with no plasticising oils and a longevity guarantee. Double Speed-Wax is the medium-hard, award-winning all-rounder that Bilt Hamber say survives around 60 washes with Auto-Foam. Hydra-Wax is the liquid, and the only wax in the range with a quantified claim: over 50% T1 carnauba by weight in the dry film.

A note on how we've written these listings

Paolo holds a degree in chemistry and will not publish a claim he cannot source. So on these pages you will find some things you don't usually see in product copy.

We tell you that Korrosol and Auto-Wheel are skin sensitisers, because they are. We tell you that Bilt Hamber call Touch-On a "ceramic" treatment but that there is no silicon anywhere in its safety data sheet, so we won't sell it to you as an SiO₂ coating. We tell you that Bilt Hamber have never disclosed what the active in Deox-C actually is — and that the confident answers you'll find on forums are guesses. We tell you that the famous 2000-hour salt spray result belongs to Dynax S50 only, not to the whole Dynax range, no matter how often it gets borrowed.

None of that makes these products worse. It makes the good claims — and there are a lot of them — worth believing.

Questions about dilution, sequencing or which product actually suits your paint? Ask us. We use this range in the studio, not just on the shelf.