At first I didn't answer if it was waterproof. WHY? I've never used heat shrink tubing just to lay it out exposed. If you're worried about how wet it will get before it starts to corrode under that shrink wrap and it will if you don't add extra protection like (tape over the entire area covering both ends of the shrink wrap the adhesive on the tape also wraps around the wire. Then and only then do you have a watertight seal. To cover a joint it's useless, if it's even a size bigger then you really need extra electrical tape. It's your choice.
Goodyear Ultra Grip Ice 2 205/50 R17 93T winter
128 Review
Flexaust 231 Plastic Elbow Black: Durable and Efficient Pipe Fitting Solution
11 Review
Quickun Industrial Grade Plastic PVC Vinyl Tubing, 5/16" ID X 3/8" OD Clear Tube BPA Free Heavy Duty, 10FT
16 Review
Clear Plastic PVC Vinyl Tubing 5/8" ID X 3/4" OD 32.8FT Heavy Duty Industrial Grade BPA Free
14 Review
Upgrade Your Draft Beer Kegerator With The TerraBloom CO2 Keg Pressure Regulator - Dual Gauge Heavy Duty Unit With Safety Features
16 Review
DIGITEN DC 12V 1/4" Inlet Feed Water Solenoid Valve Quick Connect N/C Normally Closed No Water Pressure
14 Review
Joywayus 5/8" ID Hose Barb Hex Union Brass Fitting Water/Fuel/Air With 10 Stainless Steel Clamps (Pack Of 5)
13 Review
High-Quality QiiMii Stainless Steel Sanitary Clamp With Silicone Gasket - 2 Inch, Single Pin Tri Clover Design
16 Review