TOPINCN Multi-Function Butyl Rubber Waterproof Tape for Roof Drain-Pipe Repair 5m*5cm for Crack Repair Ship Sealing Granary Sealing Building

Very strong adhesive... I haven't used outside therefore can't confirm it's effectiveness but I believe it is a good product.... Not estetically good if that matters to you.

Easy to use and works well

total waste of money, chines packaging chinese no instructionstried over a leaking pipe, waste of time still drippingavoid at all costs

used on a shed roof ! did the job well in a area where it is less obvious! all good !! maybe not ideal in prominant areas aesthetically !!!