Lye-based gel or foaming drain cleaner

My shower drain keeps clogging. The problem is that the plain old lye crystals that I’ve found at Wellcome don’t really do shit to the clog; they just wash straight down the drain. Back home, almost all you can find in stores nowadays is the gel-type or two-part foaming mix type drain cleaners, because these simply work a lot better than the old-fashioned stuff.

Anyone know where I can find either of these in Taipei? Brand names to look for?