Hmm... that would be tough to say, I would think magnetman would be the best to answer this question. 1 gallon is more than enough for the jeep, but they sell it as a 2 gallon kit for trucks for a reason.
Which does the whole inside of a TJ and then some, which makes it equivalent to the Raptor Liner system in price, I believe.
I would say it works out to less than raptor because it leave a lot left over, and you get a very thick coat, definitely much thicker than raptor or herculiner. I actually saw herculiner at the parts store the other day, it was also about $100. That seems to be the sweet spot price wise.
Would 1 gallon be enough for an 05 Unlimted to line the inside?
Vigher, I did a full write up on the install for my 05 TJ. I had more than enough left over, so your unlimited should be fine with only 1 can. I also went very thick, but you can see the whole process here
I hope that helps.
Any news on when the other colors are going to be available yet?
'94 YJ 4.0L, AX15, 231 w/ terraflex ess sye, D30/F8.8 4.88 w/ Super 88 kit and Detroit locker, 1" BL, 1" MML, 4" RE ED springs, 1" BESRK's boomerangs, on 35" BFG muds and Crager soft 8's.