I have not seen this posted before so check this out from the WEST System Epoxy website:

655-K Plastic Boat Repair Kit
Repair plastic canoes, kayaks and inflatables made from HDPE, LDPE, ABS, PVC or polycarbonate plastic with the contents of this kit. The Plastic Boat Repair Kit features plastic-
friendly G/flex 655 epoxy,and is assembled with the do-it-yourselfer in mind.

Each Plastic Boat Repair Kit contains 8.4oz of pre-thickened G/flex epoxy, protective gloves, mixing pallets and mixing sticks. Illustrated, detailed instructions explain
how to repair splits and cracks in plastic boats, attach or repair reinforcement points on inflatable boats and repair pinhole leaks in inflatables.