I would be cautious what I put on my bushes if I did not know what the compound was, if I had a problem. If the bushes are made from natural rubber or EPDM they could degrade quite quickly in the presence of mineral or synthetic oils. There are loads of incompatibility issues that can degrade or cause the material to swell and then squeak. What is good for your metal bits might not be so good for your rubber bits!
And if it doesn’t say on the tin what is inside I would not use it. Worth getting the correct dedicated rubber lube, IMHO.
