Get the ANCOR 307648 Red Heat Shrink Tubing! This cross-linked polyolefin tubing is way stronger than PVC and won't burn like it. It has a heat-activated adhesive lining that seals out salt water, oil, acids, and sunlight, and provides strain relief. With a shrink ratio of up to 1/3 of its original size, it shrinks at 257°F / 125°C. It can operate in a temperature range from -40°C to 110°C and meets UL 224 standards. The package includes 1 piece of 48-inch (122 cm) long tubing with a 1-inch (25.4 mm) diameter that shrinks to 5/16-inch (7.9 mm).
Specifications:
- Length (Imperial): 48 in
- Diameter (in): 1
- Shrinks To (Imperial): 5/16 in

Using the Ancor heat shrink tubing is easy. First, cut the tubing to the right length for your project. Slip it over the area you want to cover. Then, use a heat source like a heat gun to heat the tubing evenly. Keep the heat gun moving to avoid overheating. The tubing will start to shrink and form a tight seal around the object.
When using, make sure to wear heat-resistant gloves to protect your hands from the hot tubing. Don't use the tubing in areas with extremely high temperatures that exceed its operating range of -40°C to 110°C.
To maintain the tubing, store it in a cool and dry place. Avoid exposing it to sharp objects that could damage it. If the tubing gets dirty, you can gently wipe it clean with a soft cloth.