I think it would stay on for years!
This mascara will do as the listing describes... However it is very, very difficult to remove.  I tried baby oil, soap and water and finally coconut oil.  It finally came off... and rather uncomfortably so... no doubt thanks to the combination of all three methods I used.  This mascara seemed to harden on my lashes so that it was actually somewhat painful as it felt like something was poking the my eye lid at the base of the lashes... I imagine this was because of the fact that this product does harden and almost cement itself to your eyelashes.  Being a mature woman with what are now thin, sparse and straight eyelashes, I am concerned that this product will damage what eyelashes and quality of I have left.  I gave the product 3 stars mainly because it does add volume, it does make your eye lashes look better... but the removal process has made me want to go with another product or without altogether
Rating: 3 stars