That product is just self-adhesive thin aluminum sheet, yes?
The peel & stick from lowes is for flashing new window/door installations. It is self stick rubberized asphalt with a aluminum foil facing very simular to DynaMat, but in 4” width and not quilted.
It is also quit a bit thinner, 25 vs 67 Mil. Dynamat, Siless, KilMat are made of butyl rubber.
