Scotch 33+ and Scoth 88 are pretty ubiquitous. Certainly a Lowe's has them (just got some there today) as well as Home Depot. The formulations are now the same--only difference is that 33+ is 7 mil thick and 88 is 8.5 mil thick. And I am of the school that "more is better and too much is just enough" so I use 88! ;-) --John W0UN