If you need to change a seal to a smaller size, heating it can cause it to shrink. Fill a pot up with hot water. Drop the rubber seal into the pot of boiling water for 1 minute. Install the rubber seal to check the fit. Use a heat gun to shrink rubber seals that need to shrink in place. Click to see full answer. In this manner, is there a way to shrink rubber?Use a heat gun to shrink rubber seals that need to shrink in place. This will create an airtight seal.Subsequently, question is, how do you shrink tubing? Step 1 How to Use Heat Shrink Tubing. Measure a length of heat shrink tubing that is slightly longer than the damaged section of wire. Use a pair of scissors to cut the tubing to the appropriate length. Slide the tubing onto the wire so that it covers the damaged/exposed section. Use a heat gun to shrink the tubing. Considering this, how do you shrink silicone hose? Heat water to a rolling boil. Place the silicone in the water for 10 to 15 seconds to soften. Dry the silicone quickly. Apply the silicone to the object you are working with. Repeat until the silicone tightens to the size you require. What can I use instead of heat shrink tubing? Use a hairdryer You can use a normal hairdryer as if it was a heat gun to activate your heat shrink. It will take a lot longer than using a heat gun, especially if you only have a basic hairdryer. Hold the hair dryer as close as possible to the heat shrink and crack it up to its hottest setting.
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