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The definitive guide! How to use and choose adhesive-backed heat shrink tubing
What is adhesive heat shrink tubing?
Adhesive heat shrink tubing is a heat shrink tubing with a heat-melting adhesive (hot melt) applied to the inside.
When heated, the tube shrinks and at the same time the adhesive inside melts, adhering and bonding to the coated object .
Compared to ordinary tubes, it is characterized by significantly improved waterproofing, airtightness, and mechanical strength .
The true nature of adhesives and their adhesive strength
The adhesive on the inside is formulated by each manufacturer and has different ingredients.
Generally, common characteristics are
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Melts at high temperature → solidifies when cooled
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Adheres to a wide range of materials including rubber, PVC, and PE
What is the adhesive strength?
Depending on the condition of the material surface, it has a certain degree of strength against the cable jacket , but it does not have complete adhesive strength, so it can be peeled off.
Tips for improving waterproof performance
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Maintain the appropriate heating temperature (the adhesive must melt completely)
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Remove oil and dirt from the cable surface before heating (to prevent poor adhesion)
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By covering the tube slightly shorter, space is provided for the adhesive to escape.
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After heating, gently squeeze the tube to firmly spread the adhesive.
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Wipe off excess adhesive with a cloth to maintain a beautiful appearance.
Precautions for use
| Points to note | Content |
|---|---|
| heating temperature | Approximately 120°C or higher (depending on tube material) |
| Adhesive elution | Overheating may cause adhesive to leak from the tube |
| Texture immediately after heating | The adhesive is soft, so be careful not to squeeze it too hard with your bare hands as it may deform. |
| Dealing with overflowing glue | After heating, it can be cleaned by wiping it lightly with a cloth . |
| Precautions when storing | Avoid high temperatures and humidity, store below 25°C |
Actual construction example
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Waterproof joint processing for underground cables
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Salt damage prevention for ships and marine applications
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Terminal processing for in-vehicle harnesses
Denka Electron adhesive heat shrink tubing products
Denka Electron offers a wide range of adhesive-backed heat-shrinkable tubing.
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UL standard certified product
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Shrink ratios from 3:1 to 6:1 accommodate a wide range of cable diameters
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Special grades: flame retardant, chemical resistant, transparent, etc. can be customized
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Small lot and short delivery time available
summary
Adhesive heat shrink tubing is
It is the best choice for "waterproofing" and "highly reliable insulation."
