SONAX MultiStar Universal Cleaner

SONAX MultiStar is an anionic surfactant concentrate with four manufacturer-stated dilution ratios: 1:3 for engine bays and wheel wells, 1:5 for exterior, 1:10 for general cleaning, and 1:20 for delicate interior surfaces. At 1:10 the working solution removes road film, brake dust, and greasy floor mats effectively — community reviewers confirm strong results on rubber mats and wheel wells, with one describing it as "the sledge hammer of cleaners." The 46-review Amazon sample earns 4.4 stars; one EU-background buyer found the US 750ml bottle weaker than the European 5-liter concentrate, likely reflecting dilution-state confusion rather than a formula difference. Scored at 1:10 working solution per the concentrate protocol for this category.

Best for owners who want one concentrate to cover interior and exterior surfaces without buying separate products. Skip it for leather and clear plastic trim — both are explicitly excluded by the manufacturer. Those needing a US HazCom SDS for professional or commercial documentation should note the only SDS on file is UK REACH.

The SDS (Z62700369, rev. 08.11.2024) classifies this product at Eye Irritation Cat 2A — signal word WARNING. Working-solution pH at 1:10 is estimated around 9.5–10.0 (mildly alkaline). Eye protection is applicable during concentrate handling and spray application. No skin or respiratory H-codes appear at mixture level. Methylisothiazolinone (MIT) is present as a preservative; those with known MIT sensitivity should note its presence. SDS §12 confirms biodegradability under EU Detergent Regulation OECD 301B testing. No Prop 65 substances listed in SDS §15.