I haven't messed with ether one as trap yet, just seem's duct seal I've played with was super sticky & at around 80 dergee's seemed to run on soft side for a pellet trap?but hey I really have no idea on it other than texture & seeing it used on job site's,price seem's kinda even?and if anyone is wondering out there, just go an feel putty around led in's too furnace from air conditioner condenser from outside, it'll be a grey or black putty,plumber's you will most likely have to visit store, mainly hidden under stuff, wiped away when tightened down.