SAC-2 Lube Assembly Compound (4-Ounce)

Worked better than I expected. Completely solved my issue with bicycle seat tilt changing when riding over bumps. Increased the friction and fixed the seat in place with standard torque settings.

This saved my knees. During long rides my seat post would slide down very very slowly. By the end of the ride my seat was too low and causing knee pain. The slipping seat post and knee pain wasn’t obvious at first. I finally used this product and my seat post does not slide down at all anymore and knee pain has been significantly reduced.

I recently purchased the Park Tool SAC-2 Assembly Compound to use on my bike's carbon seatpost and handlebars, and it worked exactly as advertised. Application was easy — just a small amount provided a noticeable increase in grip, and I didn’t have to overtighten anything to keep it secure. It gave me a lot more confidence, especially knowing how sensitive carbon components can be to over-torquing. The texture of the compound is a little gritty because of the silica, but that’s what helps create the extra friction. I was careful to wipe away any excess to avoid cosmetic blemishes, as the instructions recommended. Also, I made sure not to use it on any threaded parts or bearings, since it’s not designed for that. Overall, I’m really happy with the SAC-2. It’s a simple product that makes a big difference in keeping everything tight and protected. Definitely a great buy if you're working with carbon or aluminum parts!

Well... I was skeptical about this product. I weigh in at around 210 lbs. The street pavements in my city are, shall we say, the result of defered maintaince: lots of pot holes, asphalt patches and surface breaks. In other words, my butt was like a jack hammer on my seat post. After every ride I had to readjust my seat post. But, lo and behold, this lube compound from Park Tool actually does the job. I've ridden several hundred miles since applying the compound to my seat post and I don't think its moved a millimeter. Good product that does what it's designed to do. BTW, my seatpost is alloy, not carbon.

Does what it says

We were surprised how much of a difference this made. We had a couple of newer bikes and it didn’t matter how much effort we put into over tightening the seat post, they would not stay in place. Using this stuff we were able to tighten to a reasonable amount and over a 20 mile ride the seat post stayed in place. Exactly what was needed.

This lube works great on my carbon parts as well as my dropper post.

My One Up dropper post has always slipped in the seat post of my Hightower. I previously tried the Finish Line carbon grip paste, but that had absolutely no effect and the dropper would still slip. The grit in the Finish Line paste is fairly coarse/large and I suspect the grit was not actually getting between the interface when inserting post due to the clearance being tighter than the size of the grit. The Park Tools carbon grip compound has a much smaller, finer grit than the Finish Line product and initially I wasn't convinced there was anything in it when feeling the compound. I applied the Park Tools compound to the whole tube, convinced it wouldn't work, but then I couldn't get the post to go down fully due to all the friction! I had to remove the compound and apply to a much smaller area of the post to get it to insert and even then I could feel there was significant friction. The carbon compound product that you need will likely depend on how tight the interference is between your seat and post, but I found this to work where the Finish Line product did not.

Richtig gutes Zeug...habe einiges ausprobiert...dieses hier ist top

Good. Use it on everything

Works perfectly. Nice and fine.

Super, produit .. rien à dire

It works. I tried it on the saddle and it worked