Autoglym Magma Fallout Remover: Specifications and Safety Notes
At a glance
- What it is: A colour-changing cleaner that reacts with iron particles, such as brake dust and industrial fallout, so they rinse away. It is an iron remover, not a tar remover.
- Key facts: pH neutral; leaves wax in place; safe on paint, glass, trim, wheels and matt paint per Autoglym; 3 to 5 minute dwell; 500 ml and 2.5 L; from £14.99 (Autoglym).
- Suits: Decontaminating paint and wheels before waxing or coating.
- Skip if: You need to remove tar or tree sap; Autoglym points to its clay kit for those.
We haven’t tested this product ourselves. This page summarises Autoglym’s product page (SKU MAG), checked 19 October 2026.
Specifications
| Specification | Detail | Source |
|---|---|---|
| Product | Autoglym Magma (MAG) | [1] |
| Type | Colour-changing iron fallout remover; pH neutral; will not remove wax | [1] |
| Surfaces | Paint, glass, trim and wheels; safe on matt paint and all wheel types and finishes | [1] |
| How to use (500 ml) | Cool car, shampoo and remove excess water; spray liberally; wait 3 to 5 minutes until it turns red; agitate with a soft damp sponge or mitt; rinse thoroughly | [1] |
| Limits | Not recommended for wrapped vehicles; not for non-clear-coated surfaces; targets iron only; not a clay bar substitute | [1] |
| Sizes and price | 500 ml and 2.5 L; from £14.99; free UK mainland delivery over £49.99 | [1] |
The page says the product turns red in the instructions but purple in one FAQ, so the colour is described inconsistently.
What owners report
We have not reviewed owner feedback for this product.
Known issues and safety
Recall check: we searched GOV.UK product safety alerts, reports and recalls (Office for Product Safety and Standards) for “autoglym” on 19 October 2026 and found no results [2]. Check the list again for the exact product.
Work on a cool car out of direct sun. If it dries, Autoglym says it will not stain; rehydrate it with a damp sponge or hose and rinse [1]. We did not review the safety data sheet.
Questions people ask
Will it remove tar?
No. Autoglym says to use its Clay Detailing Complete Kit for tar or sap [1]. See our clay kit page.
Does it strip wax?
Autoglym says no [1].
What if nothing changes colour?
Autoglym says the paint probably has no iron contamination [1].
Alternatives
- Autoglym Liquid Clay: The professional 5 L version. See our separate page.
- Other cleaners: See our cleaners hub.
Our verdict
Based on the evidence, this suits decontamination before polishing or coating, within Autoglym’s limits. This is a research summary, not a test result.
Sources
- Magma, Autoglym, autoglym.com. The page shows no date. Checked 19 October 2026.
- GOV.UK search of product safety alerts, reports and recalls, Office for Product Safety and Standards, gov.uk. Searched 19 October 2026.