Bilt Hamber is a small British chemistry company with an unusual approach: it publishes actual test data, sells a deliberately short range, and does almost no marketing. Auto-Wheel is the iron remover, Korrosol the fallout remover, Auto-Clay the decontamination bar, Surfex HD the all-purpose cleaner.
The clay is the standout. Bilt Hamber clay works with plain water rather than a dedicated lubricant, which sounds like a small thing until you have done a full car and realise you did not buy or use a bottle of lube. Surfex HD dilutes far further than its price implies.
The problem is coverage. Bilt Hamber’s Canadian presence is thin — Carzilla is effectively the only reliable route — and the range that reaches here is a subset of what the company makes. Several products we would like to list simply do not cross the border in any quantity.