The seam seal had me a bit worried. It was actually very easy, just take your time. I also mixed a very small amount of odorless mineral spirits in it.
This sealer is great. Although it was my first time sealing an entire tent I was able to do it in less than 2 hours. Its not as messy and expected but the applicator (brush) is not the best. I wish there were instructions that helped explain how much sealant I needed on the seams.
Bought it to seam seal my lunar solo, but instead got it mostly every but the seams. Just pay for the seam sealing service - it's not worth saving $15 ($30 service - $7.5 sealant - $7.5 mineral spirits) to DIY it. What's worse is you cannot return the tent if you even get a drop of this stuff on the tent.
This is not a product that we make however we have similar feelings, the product is quite thick but not unmanageable. If you want to thin it down we recommend using Mineral Spirits then thinning it down to a thick oil consistency, too thin and it will just leak into the seams instead of coating them.