Karnak Patch-N-Go is a self-adhesive patch repair for roofs and for repairing cracks in PVC and metal gutters.
It works just like a plaster, simply peel back the release film and apply the patch to the damaged area of the roof. Additional pressure can be applied by using a roller (or similar) to promote initial adhesion. Probably the most simple repair system on the market. No fuss or mess.