There are two common types of brake cleaner available in most of the United States: chlorinated and non-chlorinated. The big advantage of retail packaging is t

There are two common types of brake cleaner available in most of the United States: chlorinated and non-chlorinated. The big advantage of retail packaging is that it's typically in an aerosol can so you have the added perk of mechanical cleaning action. I typically use CRC brand stuff since it's easy to find, doesn't seem to harm most of the PA6/66 plastic under the hood, and works well. In not-California CRC markets the chlorinated brake cleaner with a red label and the non-chlorinated stuff with a green label. In California it's all non-chlorinated (potentially all low-VOC now too) despite the red/green cans having different SKUs. I suspect that the EU outlawed the chlorinated stuff a while back as they're typically more proactive than not-California.