That golden tin (silicoslip) you see on their website is half a kg of silicone grease, I used to buy that in Pakistan.
but if you are able to get silicone grease, then regular 3M silicone paste in a jar is great, If you are buying the superlube you need the silicone lubricating paste not the synthetic grease.
they make 3 kinds of silicone pastes, one is plain, the other has a dash of PTFE and the last is a GM genuine product with loads and loads of PTFE in the silicone paste, Its the absolute best for brake jobs. They also have a spray which is sold as a genuine GM product, its really really good for cleanly lubricating almost anything.
I like their products, low cost and great quality - I also have their heat sink paste which I use on ignitors etc, it was 6 dollars for a tube and has about more than 30 times the quantity of the little syringes you buy of it.