so when they opened the san francisco center, nordstro nordstrom's downtown, they have ramps on the ground floor, very gentle ramps but highly polish polished. the inspector said this is a slipping hazard and they said we will provide this non-skid material that we're going to paint on every six months or a year. >> the building and fire codes generally do not allow people to have to do something on a continuing basis to meet the requirements of the code. i'm pleased to hear that there's a baked on finish that meets that standard that doesn't have to be reapplied. >> well because sometimes you're using this. we did a back-painted shower where everything in this shower was chromium green. and -- yeah. >> nice. >> and including the floors. and so it's all back-painted glass. so you don't want to -- i mean, gosh, i could slip -- you could slide on a thing like that. and so it's this non--slip glass. >> i wanted to know what kind of glass is made of -- in tanks, where you can shoot through. >> the answer is it's a laminated glass. they're using a -- but instead of laminating it with a polyviny