Heat Shrink Tubing
Colored Heat Shrink Tubing – 530pcs Assorted Kit 2:1 Ratio
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Heat shrink tubing is the fastest, cleanest way to insulate, seal and identify wires and connectors. Explore our range of polyolefin heat shrink sleeves in practical sizes and colours, with popular 2:1 and 3:1 shrink ratios for tidy, professional results on electrical, automotive, marine and DIY projects across Australia.
Why buy heat shrink tubing here
- Quality polyolefin for flexible, even 2:1 or 3:1 shrink and long-term insulation.
- Sizes from small leads to thick cables (e.g., ~1.5 mm to 10 mm+ pre-shrink).
- Options for every job: standard wall, adhesive-lined (marine-grade), and colour sets for easy wire ID.
- Trade-friendly packs with clear labelling and compact storage.
- Fast dispatch Australia-wide and friendly local support.
Choose the right heat shrink tubing
- Shrink ratio
- 2:1 – Everyday repairs and insulation on evenly shaped joints.
- 3:1 – Extra versatility; fits irregular connectors and provides tighter recovery. Choose adhesive-lined for moisture sealing.
- Diameter
Measure the widest point of the cable/connector. Pick a tube with a pre-shrink ID just larger than that measurement, and confirm the recovered ID will be smaller than the cable so it grips securely. A common rule is to allow ~20–30% margin on pre-shrink ID. - Wall type
Standard wall for general electrical work; adhesive-lined where added strain relief, moisture resistance, or environmental sealing is needed. - Colour
Black for a clean finish; Red/Yellow/Blue/Green/Dark Blue for circuit phases, polarity or quick identification. - Packs vs kits
Single-size packs for known jobs; mixed kits for field service and workshops.
Popular sizes & uses
| Pre-shrink ID (approx.) | Common Uses |
|---|---|
| Ø1.5–2.0 mm | Sensor leads, small electronics, LED tails |
| Ø3.0–4.0 mm | USB/earphone repairs, jumper wires, small splices |
| Ø5.0–6.0 mm | Automotive accessory wiring, servo extensions |
| Ø8.0–10.0 mm+ | Battery leads, cable bundles, heavy-duty connectors |
How to use heat shrink tubing (quick guide)
- Cut a length 5–10 mm longer than the joint you’re covering.
- Slide the tubing over the cable/connector before making the final connection.
- Apply steady heat with a heat gun, moving continuously until the tube recovers snugly. Avoid open flames where possible.
- Let it cool before handling; adhesive-lined variants will gel and set as they cool for a sealed finish.
FAQs
What is heat shrink tubing?
It’s a cross-linked polyolefin sleeve that contracts when heated, creating a tight, protective layer around wires, joints and terminals.
Which shrink ratio should I choose?
Use 2:1 for standard straight joints. Choose 3:1 when you need the tube to fit over a larger connector and still recover tightly, or when using adhesive-lined tubing for extra sealing.
Is adhesive-lined heat shrink waterproof?
Adhesive-lined (often called marine-grade) provides enhanced moisture resistance and strain relief when correctly sized and shrunk. For fully waterproof systems, pair with appropriate connectors and sealing practices.
What sizes do you stock?
Common pre-shrink diameters range from small electronics sizes (~1.5–2 mm) up to heavy-duty cable sizes (8–10 mm+), in both single packs and assortment kits. Check each product card for exact measurements and recovery ranges.
Ready to get started? Browse the collection below to find the heat shrink tubing, ratio and size you need for a neat, long-lasting finish—shipped fast across Australia.
