Suitable grease for PU bushings

After 2 years of use, my Hotchkis sway bar bushings have started to squeak a bit when going over bumps. I'd like to re-grease them, but unfortunately, the grease sachet that I have does not have any markings of its type nor is enough to cover 4 bushings. The only thing that I know, is that it's a clear grease that's all.

The powerflex PU bushings I used to have came with copper grease which I have plenty, does this mean I can use that? I mean, both (Hotchkis and Powerflex) came with PU bushings, so the grease should be compatible?

Thanks

Edit: found this, but still doesn't say specs or brand/type

i think the link you gave would work. i dont see why it wouldnt, this sounds stupid, but i dont really see what specs you want? it seems it is made for the product you have, and want to use it on.

Well I want specs because I like to know exactly what I use and 2nd, I'm overseas so I don't plan to spend twice the product's value to have it shipped here and then have to pay import tax as well. PU bushings isn't a common mod here, so not many places to find spare parts or special lubricants

Hotchkis sells their grease in a tube. I find the hotchkis grease to be very very good. The fact that it took 2 years to start squeaking is awesome. Right now I'm using royal purple synthetic grease and it seems fine as well. You're basically looking for heavy weight grease that won't break down or wash off.