Heat Shrink Tubing Shrink Ratio
The shrink ratio decides how far the part must recover. Pick 2:1 for simple steps, 3:1 or 4:1 for bulky connectors, and braided or cold shrink where no heat is wanted.
2:1
3:1
4:1
Multi-Ratio (2:1 / 3:1 / 4:1)
No Heat Recovery (cold shrink, braided & woven sleeves, tapes)
Frequently asked questions
Which shrink ratio do I need?
2:1 for simple steps; 3:1 or 4:1 when the sleeve must pass a bulky connector and recover onto a thin wire.
Do you offer 4:1 heat shrink?
Yes — PVC and dual-wall adhesive ranges reach 4:1; PTFE multi-ratio covers irregular shapes.
What if I cannot use a heat gun?
Cold shrink and expandable braided sleeves recover or wrap without heat — listed under No Heat Recovery.
Is the recovered ID tight enough?
Spec supplied ID >= ratio x largest object OD so recovery grips without splitting.