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4:1 Shrinkflex® Heatshrink Tubing

Highest Ratio Heatshrink for The Tightest Fit

Shrinks to 1/4 Its Original Size!

ShrinkFlex® 4:1 over-expanded flexible, flame retardant heat shrinkable polyolefin tubing is used for special circumstances such as jacket retrofitting or repair and electrical insulation of wire assemblies with oversize components or connectors.

The over-expanded product configuration easily fits over the end of a connector, and shrinks down to 25% of its original diameter to fit snugly over the wires. Available in Black only.

Glue lined heat shrink tape can be added to create a weather tight and permanent finish.

ShrinkFlex 4:1 heatshrinkable tubing is RoHS compliant.

  • SHRINK TEMP: 194°F (90°C
  • COLORS: Black
  • Flame Retardant
  • Wide Selection of Sizes
  • Resists Common Automotive Chemicals
  • RoHS Compliant


STEP ONE:Measure the Shrinkflex® shrink tubing to length and cut with a scissor. The thickness of your bundle, as well as the desired final appearance, will determine the length of the tubing you cut. Generally, a piece 1 1/2” - 2” long will accommodate almost any need. Single wires, or smaller bundles, require shorter pieces.

STEP TWO:Slip the Shrinkflex® heat shrink tubing over the bundle and position it so that both the sleeved and unsleeved portions are sufficiently covered. Notice the small pieces of tubing in- stalled on single wires as part of a color coding system. If your project requires multiple operations, always work up from the smallest to the largest bundle.

STEP THREE:Gently apply heat to Shrinkflex® heat shrink tubing from a heat gun, hair dryer or torch with an appropriate attachment. Keep the heat source far enough away so that hot metal or direct flame does not come in contact with the tubing, wires or sleeving. Move the heat around the bundle to prevent damaging the sleeving and to ensure that all areas of the tubing have been shrunk. Once cooled, your installation is complete.

Nominal Diameters

Nominal Diameters

5 Products
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Shrinkflex® Polyolefin Heatshrink Tubing - 4:1 - 1/2" - Black

Price/Ft:  $3.80
Price/Ft:  $3.80
Total: $3.80

Shrinkflex® Polyolefin Heatshrink Tubing - 4:1 - 3/4" - Black

Price/Ft:  $5.60
Price/Ft:  $5.60
Total: $5.60

Shrinkflex® Polyolefin Heatshrink Tubing - 4:1 - 1" - Black

Price/Ft:  $8.00
Price/Ft:  $8.00
Total: $24.00

Shrinkflex® Polyolefin Heatshrink Tubing - 4:1 - 1 1/4" - Black

Price/Ft:  $10.50
Price/Ft:  $10.50
Total: $31.50
Price/Ft:  $11.50
Total: $34.50