watch the video...lol
MagicPen™ Grout Pen is designed to instantly color and cover stained, or old grout. It also helps prevent further molding with its anti-bacterial formulation.
I 'm more selective on my urine jobs now. I basically just blanket coat everything with Cat Attack and CRB it in. Been having good luck. I've raised my prices 25% and lost a lot of my lower end and PIA customers. I'm not sad.Good for hiding urine damaged grout too