3M Heat Shrink Tubing EPS-300
Adhesive-Lined, 3:1, Flexible, Polyolefin
Data Sheet August 2011
Description 3M Heat Shrink Tubing EPS-300 is a 3:1 thin-wall, flexible tubing offering the
advantages of integral, adhesive-lined construction. The tubing is made from flame-
retardant, flexible polyolefin with an internal layer of special thermoplastic adhesive.
The heat-shrinkable outer wall is selectively cross-linked, while maintaining the high
flow and excellent adhesion of the inner sealant liner.
When heated in excess of 121C (250F), EPS-300 tubing rapidly shrinks to a
skintight fit, forcing the melted adhesive lining to flow and cover the substrate. The
adhesive forms a flexible bond with a wide variety of rubbers, plastics and metals.
Upon cooling, the adhesive solidifies, forming a permanent, non-drying, flexible and
water resistant barrier. Adhesive reflow will occur at temperatures above 80C
(176F).
Agency Approvals & UL Recognized (all colors except clear), UL File E-157227 at 600 Volts and
Self Certifications
125C maximum
CSA Recognized, CSA File LR38227
Applications EPS-300 tubing offers excellent environmental protection for electronic components,
wire splices, wire bundles and harness breakouts. Automotive, truck and marine
wiring splices and harness breakouts are quickly and easily protected from harsh
environments.
Shrink Ratio EPS-300 tubing has a 3:1 shrink ratio. When freely recovered, the tubing will shrink
33% of its as-supplied diameter. The recovered wall thickness of the tubing is
proportional to the degree of recovery.
The operating temperature range is from -55C (-67F) to 110C (230F), with a
shrinking temperature minimum of 121C (250F).
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Not for specifications. Values are typical, not to be considered minimum or maximum.
Properties measured at room temperature 73F (23C) unless otherwise stated.
Typical Properties
Typical Value
Physical Property
US units (metric)
Tensile Strength
2100 PSI
Ultimate Elongation 450%
Longitudinal Change +1, -15%
Secant Modulus (2%) 17,000 PSI
Specific Gravity 1.3
Heat Aging (outer wall only)
168 hrs @ 175C Elongation 175%
Heat shock (outer wall only) No dripping, flowing,
4 hrs @ 225 C cracking
Low Temperature Flexibility (outer wall only)
4 hrs @ -55 C No cracking
Self-extinguishing, meets
Flammability UL224 All-Tubing Flame
Test (jacket)
Typical Value
Electrical Property (Test Method)
US units (metric)
Dielectric Strength 700 V/mil
14
Volume Resistivity 10 ohm/cm
Typical Value
Chemical Property (Test Method)
US units (metric)
Corrosion Resistance (Copper mirror) Non-corrosive
Fungus Resistance Non-nutrient
Water Absorption 0.3%
Fluid Resistance Excellent
Adhesive Typical Value
Peel Strength, pli
Polyethylene 30
PVC 10
Lead 15
Aluminum 40
Corrosive Effect (Copper mirror) Non-corrosive
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