Seal your piping with Pipe Wrap Tape. Temperature resistant 80°C. 100% Waterproof. Works well in pressure-sensitive applications.
Smart Stripe Tape
Orbit 2 in. x 50 ft. 20 Mil Pipe Wrap Duct Tape 53550 - The Home Depot
2 in. x 100 ft. x 10 Mil Pipe Wrap Tape, Black
Lyn Car Pipe Wrap Tape, 10mil - 2 x 100 Feet 9052
Clear Cellophane Gift Wrapping Roll 30 x 100ft Christmas Gift
Pack-n-Tape Scotch® Box Sealing Tape 311+
86080 2 X 100' 10 MIL PIPE WRAP TAPE
Scotch® Super 33+™ Vinyl Electrical Tape
Plumber's Tape - thread sealing tape, foil tape, strapping tape
Scotch Electrical Tape Rainbow Packs @ FindTape
How to Build a Low-Cost Greenhouse With PVC Pipes - Dengarden