Cant remember name of a teeth cleaning product

A while back on here someone recomended a liquid that you put on your cat's teeth. There was a pretty long discussion about it, but I cant find it going through the old forum posts because I can't remember the name of it. Its kind of pricey but it had some good posts about it...Anyone remember? thanks everyone
p.s. i keep thinking it started with an L

Was it Logic Gel from the UK? Some of our members use it. I know there are a few threads in Care & Grooming about it