57gm / 2 oz. 100% Pure Genuine RED Rubber Grease, for Brake Caliper Piston Seals and Boots, Corrosion and Oxidation Resistant, Meets Lucas Girling TS-2-34-04 spec.

UPDATE: I used this grease when I rebuilt the rear caliper and the clutch slave cylinder of my motorcycle last winter. I put a small amount on the rubber lip seals for each of the pistons, then reassembled everything as normal.I've been riding the bike several times a week for a few months now (a couple of thousand miles in total). The clutch and rear brake work perfectly. The rear caliper no longer drags and the clutch lever feels good, with crisp engagement and release.From now on this will be me go-to grease whenever I rebuild any hydraulic systems using DOT3 or DOT4 brake fluid. I have another couple of calipers to rebuild on my old truck, and next winter I'll probably redo the front calipers on the bike. I'm going to use this grease on each and every piston seal.Original review below:I have an old motorcycle that is an absolute bear to push around. The brakes work fine but the calipers drag.I've rebuilt calipers before and always used brake fluid as a lubricant for the pistons and seals. This is because all of the books tell you to do so, and also because petroleum-based lubricants can swell a lot of the rubber components used in brake systems. I learned this lesson firsthand in the past when I used anti-seize (which uses a petroleum-based carrier oil) on a set of Toyota caliper pins with a rubber bushing on them. I thought I was being very clever by keeping the caliper pin from corroding in the bracket. Instead, I swelled the rubber bushing up to the point where it froze in position. Lesson learned.Many years ago I had heard of brake assembly grease used by AP Girling when assembling brake calipers. I couldn't find much info at the time but I discovered that the grease was designed to be compatible with the rubber used in brake systems and was used to lubricate the pistons and piston seals on assembly. It seemed odd to me but I never forgot about it.Fast forward to a few months ago when I discovered that both brakes on my motorcycle are dragging. Opening the bleeder valve on the calipers doesn't alleviate it so I know I'm dealing with stuck pistons in the calipers. Time to rebuild.I don't ride this bike much and I don't want to rebuild these calipers very often so I was looking for a way to prevent piston sticking in the future. I searched for AP Girling brake grease and eventually made my way here.For $13 I probably have a lifetime supply. I certainly won't use it all up rebuilding calipers (at least I hope not). I'm going to go through the entire braking system on my bike, and this grease will (hopefully) keep the pistons lubricated enough and corrosion-free enough to not stick any more. I've read about several people curing their sticky caliper issues with this so I'm fairly confident. Wish me luck.

this worked perfectly the piston boots were easy to install

Exactly what I needed, great stuff

Best rubber grease I could find. Perfect for rebuilding calipers.

I maintain a very old car that has become impossible to find parts for. Every 8 years or so it needs brakes and the calipers are always rusted internally in the "dry area" between the seals with the pistons pitted and stuck. This last time i was not able to come up with replacement brake calipers so i had to gather the pistons and seals and rebuild the ones on the car. It was already an enormous cost and who knows if i will find more when i need them next time. After years of talking to experts and reading about it, i had never heard anyone talk about greasing these parts. Any calipers i ever bought were either dry or lightly wetted with brake fluid but never greased. I specifically searched for "caliper seal grease" and this hidden product revealed itself to me. Now that i have the stuff, NOW people say "oh yeah of course" even though nobody mentioned it before. Now i can tear them apart and grease them yearly and hopefully those parts can last and last.

I bought this because my atv carb choke keeps sticking, and i was hoping that this non-petroleum formulation would lube it for longer than silicone. It does last longer, but still ultimately washes away from the gas. Bummer.It does work great for brake stuff though (caliper slides, etc) and that's great to have. So ultimately a good product.Now just gotta experiment more for the carb...

I attempted to rebuild the front brake calipers on my Jeep Grand Cherokee and tore the seals when trying to only use brake fluid as the assembly lube. I bought another set of seals and this grease and it assembled MUCH easier the 2nd time around.

As has been noted by many others, red rubber grease effectively lubricates piston seals & dust boots. In addition, it is compatible with DOT 3, 4, and 5.1 brake fluid. There are some mechanics who stay with brake fluid as the "lubricant" (which it is not) for piston seals and dust boots, because they perceive (misperceive) there is a risk of brake fluid contamination. I have yet to read of or see a single instance where DOT 3, 4, or 5.1 brake fluid was contaminated by the use red rubber grease, or vehicle braking was compromised in any way. To the contrary, red rubber grease optimizes seal/piston/dust boot function, longevity and, consequently, braking performance.