Brake Cleaner vs Carb Cleaner: Which One Should You Buy?

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Below: what each cleaner is made for, how they differ, whether they can be swapped, and the four brake cleaner listings ranked.

Brake cleaner vs carb cleaner: what each one does

Brake cleaner is formulated to strip oil, grease, brake fluid and brake dust from brake parts and dry fast without residue. The CRC Brakleen listings describe fast-drying formulas that remove oil and grime from brake linings, pads, drums, calipers and clutch discs, and the Denco listings describe a high-pressure spray that removes grease, oil and brake dust with fast drying and minimal runoff. Carb cleaner is a different solvent blend aimed at varnish and carbon in carburetors and throttle bodies. The two are not interchangeable by default: a cleaner made for one job may damage parts made for the other.

The key differences

Read the label before you spray. Brake cleaner on rubber or plastic carb parts can cause swelling, and carb cleaner on brake parts can leave residue that the brake listings specifically avoid.

Can you use carb cleaner on brakes?

Not as a rule. Brake parts need a cleaner that dries fast and leaves no residue, because residue on a rotor or pad changes how the brakes bite. The brake cleaner listings here all promise exactly that. A carb cleaner is built to dissolve varnish, not to leave a clean dry brake surface, so keep it on the fuel system side.

Can you use brake cleaner as carb cleaner?

Sometimes, on metal parts, but check the label first. Brake cleaner is a strong solvent, and the non-chlorinated formulas here are low VOC, but it is not formulated for carburetor varnish, and it can harm rubber seals and plastic parts in a carburetor. For a carburetor job, buy the cleaner made for it.

Chlorinated vs non-chlorinated brake cleaner

Three of the four listings here are non-chlorinated: the CRC 14oz and both Denco 1930 listings. The three non-chlorinated listings here claim low-VOC formulas, and the Denco listings add low odor and note that sale is prohibited in ten states. The CRC 19oz listing is a non-flammable chlorinated formula built on perchloroethylene. Chlorinated brake cleaner is non-flammable, which matters around hot brakes, while non-chlorinated cleaner is usually flammable, so check the can before spraying near heat.

The four listings, ranked

All four listings are brake cleaners, ranked by our scores.

1. CRC Brakleen Non-Flammable 19oz 12-pack. A 19oz non-flammable brake parts cleaner in a 12-pack, built on perchloroethylene, that cleans and dries fast and leaves no residue. The bullets list use on spring brakes, wedge brakes, brake cylinders, brake drums, brake linings, brake shoes, calipers, clutch discs and disc brake pads. The spec table gives 2.63 by 2.63 by 9.25 inches and 1.2 pounds, and the warranty line reads only Parts, with no term. This is the pick if you want a non-flammable formula.

2. CRC Brakleen Non-Chlorinated 14oz 12-pack. A 14oz non-chlorinated brake parts cleaner in a 12-pack, with a low VOC formulation that removes brake fluid, grease, oil and contaminants from brake linings, pads, cylinders, drums, shoes, calipers and clutch discs. The spec table gives 10 by 2 by 2.7 inches and 1.6 pounds, and the warranty line reads Limited MFG Warranty with no term. This is the pick for a lower-odor shop.

3. Denco 1930 24-pack. A 13oz non-chlorinated brake and parts cleaner in a 24-pack, with 15.3 fluid ounces per can, low odor and low VOC, and high pressure from full to empty. The bullets describe fast drying with minimal runoff and cleanup, and the spec table gives 14 pounds for the pack. Sale is prohibited in DE, NH, MD, CT, UT, CA, RI, MI, CO and NY. This is the pick for a busy shop that goes through cleaner fast.

4. Denco 1930 12-pack. The same 13oz non-chlorinated Denco 1930 formula in a 12-pack, with the same low odor, low VOC and high-pressure spray, and the same state restrictions. The spec table gives 15.3 fluid ounces per can and 14 pounds, the same weight it lists for the 24-pack, which looks like a listing error. It is the same 13oz formula in a smaller pack, which suits a home garage that will not use 24 cans.

Frequently Asked Questions

Can I use brake cleaner instead of carb cleaner?

Not as a rule. Brake cleaner is made to dry fast and leave no residue on brake parts; it is not formulated for carburetor varnish and can harm rubber and plastic carb parts. Buy the cleaner made for the job.

Is brake cleaner flammable?

It depends on the formula. The CRC 19oz listing here is non-flammable, built on perchloroethylene. Non-chlorinated brake cleaners are usually flammable, so check the can before spraying near heat or flame.

What is the difference between chlorinated and non-chlorinated brake cleaner?

Chlorinated brake cleaner, like the CRC 19oz here, is non-flammable and built on solvents like perchloroethylene. Non-chlorinated cleaner, like the CRC 14oz and Denco listings, is lower in VOC and odor but usually flammable, and the Denco listing notes sale restrictions in ten states.

Will brake cleaner damage rubber?

It can. Brake cleaner is a strong solvent, so keep it off rubber seals, plastic trim and painted surfaces unless the label says otherwise. The listings here are made for metal brake parts.

How much brake cleaner do I need?

The listings here come in 12-packs and a 24-pack of 13 to 19oz cans. A home garage doing occasional brake jobs will not use a 24-pack quickly; a busy shop might. Buy for the work you actually do.

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