Loctite 37509 Klean 'N Prime Anaerobic Activator Aerosol Can - 4.5 oz.

Worked like magic. Set up hydraulic fitting sealant like a charm. No leaks!!! Cleaned dirty fittings w brake cleaner, used this primer, and some good hydraulic sealant and worked like a dream.

Yeah couldn’t believe I wasn’t able to get this at the auto parts store was working with an aluminum block and although the loctite pack says it works better with inactive metals it still instructs the user to use primer so I went ahead and got it here I think its worth the money for peace of mind my motors not gonna fall apart on the highway.

1st off, this product IS NOT intended to clean greasy parts from the get go. It's merely use as a final clean before assembling your parts. Note: This product contains ACETONE and BUTANE and is highly flammable. Even though Acetone and Butane is not consider extremely toxic on certain web sites, I would consider as such. Meaning, you should be in a WELL ventilated area. I did my work outside and it still can take your breath away. I would highly recommend wearing gloves (e.g. nitrate) while working with it. It will dry the moisture out of your skin. Finally, wear a face shield for eye protection too. I hung my parts [bearing race] on a wire as I sprayed them down and let them dry. It remove any residual oil film on the race. I am using Loctite 660 to glue this bearing in place, due to spinning on its own. All of this is needed to insured that the glue bonds to both metal surfaces for the bearing race. I am well pleased how my project turn out and save me an expensive repair.

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First, "what's inside": Acetone 67-64-1 60 - 100% 2-Ethylhexanoic acid 149-57-5 0.1 - 1% Isobutane 75-28-5 10 - 30% Basically: cleaner, catalyst, and propellant. I had a knurled grain mill roller with a right-hand-threaded drive shaft that unfortunately I wanted to run in reverse, which mean the shaft would immediately unthread. I picked up some "permanent" Loctite and this "Activator" and after first cleaning both male and female threads to within an inch of their (or my) lives I applied the "Activator" to both parts, let them sit for an hour to ensure both parts were thoroughly dry, then applied the thread locker and screwed in the drive shaft and then let the assembly sit for 24 hours. Tested the mill with a full hopper of grain (~18 pounds) and it plowed through it all with zero issues. Knock on wood :) Cheers!

I purchased this to pair it with the loctite 660. I later found out from loctite that this is not needed if you have a metal that will corrode. Tried to return it but Amazon wouldn't let me "something about health and safety" so make sure that you need this product before you purchase it.

I used this stuff on a recoil spring guide rod on a Sig Sauer P938. The rod would unscrew from the base and fall out of the gun. I could not get Loctite so I used Permatex with a heat rating of 450 F. I cleaned the guide rod and base threads with Hoppes #9 and after it was dry I sprayed the threads with Klean N Prime. I applied So far the problem appears to be fixed. I think this stuff helps prepare the surface of the threads for the thread locking agent. The stuff had a lot of fumes and I wore rubber gloves to keep it off my skin. It did not require much spraying. I would recommend using this with any thread locker.

LT primer in spray can .works as designed!

excellent

Works exactly as described