3M FP-301-1 Heat Shrinkable Flexible Polyolefin Tubing

3M FP-301-1 is a thin-wall, heat-shrinkable polyolefin tubing designed to insulate and protect electrical wiring and components. It shrinks 2:1, reducing from a 1.00 in pre-shrink bore to about 0.50 in after shrink, enabling snug coverage on wire harnesses and assemblies. Made from flexible polyolefin, FP-301-1 is rated for operating temperatures up to 135°C (275°F), making it suitable for automotive, electronics, and appliance applications where insulation and abrasion resistance are required. Common applications include protecting wire harnesses, providing split-resistance coverage, marking wires, bundling cables, and safeguarding component packaging. The FP-301-1 family is offered in multiple colors and lengths, with clear and black color variants widely documented; lengths include 50 ft spools for some regional listings and 100 ft spools in others (for example, FP-301-1-CR-100 and FP-301-1-BL-100). This combination of 2:1 shrink, polyolefin composition, and thin-wall construction supports straightforward installation in tight spaces while delivering durable, flexible coverage.