INSTANT INSTALL 29 MINUTE EPOXY - 1 GALLON KNIFE GRADE

I bought this and it sets quickly like it says but I assumed it could be used outside because it also advertises that "it isn't weather or climate sensitive! It will cure fast in hot or cold temperatures, whether it is humid or arid". In fact, it got 'gummy' outside and many seemingly good bonds on marble simply rotted. Also, it says that you can color it or leave it "clear". In fact, using marble dust for coloring or leaving it uncolored both ended up changing color to a dark yellow. I subsequently found another site which advises to use ONLY inside. That's correct with this item. I used it on a marble gazebo in which I have $25,000.00 invested. Now I have to hold my breath it doesn't collapse.