Park Tool ASC-1 Anti-Seize Compound

(837 Reviews)

Price
$9.95

Quantity
(10000 available )

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100 Ratings
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Reviews
  • Tom Holmes

    08-06-2025

    Nothing’s seized yet :)

  • ECF

    > 3 day

    Used to keep moisture from between parts which pr vents rust, and keeps parts from literally seizing together. This isnt grease.

  • A. Aurelius

    > 3 day

    Have you ever seen a weight weenie who likes 21 pound full suspension mountain bikes or 11 pound road bikes, install titanium bolts into an aluminum or carbon fiber frame to save 30 grams on the overall weight of the bike? Or even worse, install a titanium bolt into a titanium frame ? (not recommended even with anti-seize compound) I have, and unfortunately I have also seen the damage done when someone tries to forcefully extract the same seized titanium nut or bolt a year later, which then has to be drilled out or in some cases can even ruin the frame. That is where anti-seize compound comes in. And Park Tools formulation is just as good if not better than any generic compound you buy at an auto store. I have no idea what the exact elements are in this Park Tools lube but I would not be surprised if it was partially Moly-50 with some zinc added for best protection with aluminum and titanium. (which also would work equally well with carbon fiber). At any rate, this lube works well. Very nice to have for bottom brackets on my titanium hardtail and for bolt hardware. I have been using this lube for multiple rebuilds over the last 15 years roughly and this has saved my butt from galled, corroded and seized components on more than one occasion. In my book, that makes it five stars!

  • avid gardener

    > 3 day

    I had asked online forums and Amazon about the best grease to assemble bicycles, and this was it. Great stuff.

  • Steve R.

    > 3 day

    What can you say about anti-seize? This stuff isn’t so great to get on you hands but if you put it on the threads of fittings being attached to titanium bicycles it works perfectly and stops them galling or binding.

  • Blasphemate

    > 3 day

    What can I say? Park Tools stuff just works and it works well. No complaints.

  • Lei Zhang

    > 3 day

    its a little different from regular grease, but its gonna do the job!

  • dara faye

    Greater than one week

    This stuff works great. Its particles increase friction, and your torque levels significantly decrease because of it so you dont over-tighten your bolts. I probably use this more than my standard green grease, but it this has its specific uses and blue is my favorite color so I’m biased. If you have high quality aluminum, titanium, or carbon components, this compound is fantastic. Highly recommend having this in your tool box, junk drawer, bicycle fanny pack (you do you). This is for sure an essential item now that I have bought it and determined it as such.

  • agzhl

    > 3 day

    Bought a Thudbuster LT seat post and needed to clean and lube the shaft. Since I have a titanium frame, I did some research on different lubricants. Ultimately, I erred on the side of caution and opted for this particular lube specifically because it is anti-seize. Its easy to use and the new seat post slid in easily as well. It is a bit on the expensive side in terms of lubricants but the peace of mind is worth it when you invest a lot in your bike parts and want them to last. The size is also great for storing in a bike pouch along with some other small bike tools. I only applied this a month ago so I cannot speak for long-term efficacy. Thus, the four star rating for now. If it still holds up after some time, I will up the rating to 5.

  • Jeff Wallace

    > 3 day

    Works as advertised. Important to grease the connection between the pedal and your crank.

Park Tool ASC-1 being applied to threaded bottom bracket cupPark Tool ASC-1 being applied to threaded bottom bracket cup

Park Tool ASC-1 Anti-Seize Compound

Park Tool Anti-Seize Compound reduces friction in threaded and press fit connections for easy assembly and disassembly. Ideal for bottom bracket and pedal threads, pressed headset cups, seat posts, quill stems, etc. ASC-1 seals and protects parts from corrosion and rust under the most extreme conditions. For use on steel, aluminum, and titanium.

Park Tool ASC-1 comes in a 4 oz. (113 g) tube.

NOTE: Some painted surfaces can be sensitive to oil and grease. Clean off any excess oil or grease immediately. Test first on an inconspicuous area to see if it causes a stain or discoloration. ASC-1 can also stain fabrics - use appropriate caution.

Park Tool offers a full line of greases and compounds for thread and surface preparation:

Park Tool PPL-1 Park Tool HPG-1 Park Tool ASC-1 Park Tool SAC-2 Park Tool TLR-1 Park Tool RC-1
PPL-1 Polylube 1000 HPG-1 High Performance Grease ASC-1 Anti-Seize Compound SAC-2 Assembly Compound TLR-1 Medium Strength Threadlocker RC-1 Press Fit Retaining Compound
Recommended application General purpose grease for bearings, threads, and general assembly Precision ground/ceramic bearings, pivots, suspension components Bottom bracket and pedal threads, pressed headset cups, seat posts, quill stems Seatposts, handlebars, stems Threaded bottom bracket cups, disc brake rotor bolts, stem bolts Press fit bottom bracket parts, pressed headset cups, sealed bearings
Park Tool bike shop repair center vintagePark Tool bike shop repair center vintage

TRUSTED SINCE 1963

Since our origins in the back of a bike shop in 1963, it has been our sole mission to design and manufacture high-quality tools that empower mechanics and riders of all skill levels to service their bicycles. As with our other 500+ tools, our grease is a product of our decades of experience and expertise in the industry, in the shop and on the trail.

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