Well there you go. WEAL uses it a lot apparently I never have.Can't find a small quantity at a reasonable price but I will use it as it's widely used in food production.
As for strong cleaner vs sanitizer it might be levels of paranoia on my part but sterilizer -nope nothing you buy from the LHBS fits that bill really.
If you wanna sterilize something you need to chuck it in a good pressure cooker (ie high pressure) or an autoclave.
Sanitizing is good enough for brew gear, when I'm storing yeast it's the pressure cooker for me.