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Kroil is great stuff. But, after clipping the plastic spout of the kroil can, I found the hole too big; the valuable kroil comes out in a mini-gusher. So now I fill one of my used medical syringes with the kroil, and the liquid can be applied sparingly and with precision. The needle is small enough to get right into the bolt thread groove where it enters the nut, then capillary action will take the kroil where it needs to be. Very little waste, and the kroil liquid is a better bargain than the spray. Not sure since my syringes come with my prescription, but I think syringes can be bought at a pharmacy or from a vet.
ive done that for years with wd 40 and simler products. i get syringes from my vet and with just about evry bottle of medicine i buy for the cows. wich is alot. i think that a box of 50 syringes in 10ml size is like 5 bucks i cant rember exactly but i no there dirt cheap.
I use the little tube extension on the KROIL spray can, the waste is kept to a minimum and you can reach awkward places such as manifold studs. The same with WD-40.
I will have to try the hypo thing, it sounds like it has it's uses,
Try filling the Hypo with grease, you can repack those noisy sealed bearings for dang near free.
Case and point. On my 93 F150, the idler bearing was making noise. Ford wants $28.00 for the new idler, I removed it and slipped my 'Hypo-grease gun' under the seal. Gave it about a 10 second shot of grease.