We used the closed cell foam insulation in our basement. We actually did 2 houses with the 600 board foot product. We were worried about clogging the tips so we bought extra. We thought the fan tips would work better so we bought more of those. We found that the process worked great, we did not need to worry about the tips clogging as much as we thought, even when we transported the product between houses and started it back up again. We also did not even use any of the fan tips as the cone tip worked perfect for our application. The only negative we found is that the tip does drip a little bit so we used cardboard on the floor but we still had spots where the foam got on stuff, but that was easy clean up and not a big deal.