Tip 1: When shrinking heat shrink tubing it is advisable to start the shrinking process in the middle section of the tubing and then gradually proceed to one end and then from the middle again to the opposite end. This helps you avoid trapping air under the tubing.

Tip 2: Tubes also shrinks longitudinally i.e. along its length. You should factor in this shrinkage when cutting the tubing into lengths. 

Tip 3: It is possible to minimise the longitudinal shrink by shrinking the ends first and then the middle section. However, if you do this, air can get trapped, which will prevent the middle section from shrinking. Alternatively, you can shrink the tubing by starting at the most critical end and then shrinking down slowly towards the other end.

Tip 4: If the object to be covered is metal or heat conductive, care must be taken to ensure the object is pre-heated to avoid “cold spots” or “chill marks”. This ensures a tight and smooth fit of the tubing.

Tip 5: When cutting heat shrink tubing and wrap-around sleeves to the desired length, take special care to ensure that the ends are cut smoothly. Poorly cut and irregular edges can cause heat shrink tubing and sleeves to split during shrinkage.

Tip 6: When choosing the tubing size it is important to consider the 80:20 rule. This means the tubing size should be chosen to allow minimum shrinkage of 20 % and a maximum of 80 %. Detailed examples of how to select the right heat shrink tube are available in the insulation product section of our catalogue.

Tip 7: During shrinking you should always make sure that the workplace is well ventilated and that you wear personal protective equipment like gloves and safety glasses.