No our lash adhesive is not waterproof. However, it is Water-resistant:able to resist the penetration of water to some degree but not entirely.
You can wear the lashes between 2-5 days. Let your natural lashes take a break for 1-2 days before reapplying our lashes.
No damage should be done to your natural lashes if removed correctly. The false lashes should "slide off" your natural lashes. It's easier if we show you here