It is about 1/8-1/4" thick. I don't have any experience with Lavaliner, but it is harder than Rhinoliner. It still has a bit of give. It is thicker than paint. Basically I lay on one thick coat up close to get all the coverage, and then I spray a bunch of different coats over the surface to built texture and thickness. It is really good at sound deadening, but I don't have any dB tests. I should have done them on this Jeep, but I didn't think about it till after the fact.
I do have some samples, too.
And I'll get some pics of it closer up for you.