The "FlexSTUFF" is only for a possible 1 day, temporary, low holding power adhesion, not water pressure sealing STUFF.
No Adhesive stuff works at all unless...
1) compatible materials.
2) Bonding to the edges and surface
3)Applied per instructions.
Think about how steel is sealed. Welding!
I have a small roll of FlexTape for a "first defense" to control/stop a small water leak, while it get the rest of my emergency STUFF to manage a boat leak.
As kloude1 noted UV light degrades "FlexSTUFF"!
Jim...
PS: I bought two cans of FlexSpray. Great for sealing Ant beds, makes them crazy, especially the clear type.
