Actually, wrong again. I applied two coats and it was at least as thick as any spray in. That's what's great about Herculiner... You can put on as many coats as you want.
And like it says in their FAQ "Herculiner sticks to herculiner better than it sticks to anything". So if you do the prep correctly, you'll have a super nice thick rollin bed at at least 1/3 the cost of a spray in. And touching up is easy too should you drop a fridge into your bed..
