Blackening faded plastic trim

So about 12 years ago I bought a Cherokee with faded plastic trim and I bought this product which I found locally but discovered on an online forum that worked great. I seem to remeber it was a clear thicker than water product (but not quite a gel). Do you think I can rember the name? Nope... Anyways, still have that cherokee, still use it as a daily driver and those trim pieces still come up like new after a wash with only one treatment!! Anyways I have another vehicle that needs the same treatment so if anyone can offer any suggestions as to what the name of that product might have been please let me know. I suspect since the product worked so damned well it probably doesnt exist anymore, but here's hoping!!