Collection: Heavy Dual Wall 3M Adhesive-lined Heat Shrink Tubing 3:1

Heavy-duty 3:1 dual wall heat shrink tubing with 3M adhesive-lining delivers superior environmental sealing for automotive, marine, and industrial electrical systems. This high-performance tubing is designed for wire sizes from 18 AWG to 400 MCM, providing reliable insulation, strain relief, and waterproof sealing for cables, terminals, and splices. The outer polyolefin layer shrinks at a 3:1 ratio while the inner thermoplastic adhesive layer bonds tightly to wires and connectors to block out moisture, chemicals, and corrosion.

Available in black and red options, each size is precision-engineered with specifications such as recovered wall thickness up to 0.17" and inside diameters ranging from 0.1" to 2.0". Ideal for battery cables, ground wires, power leads, and heavy-gauge connections exposed to vibration or harsh conditions. Meets stringent performance demands for technicians, mechanics, and fleet maintenance operations.

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  • 12 Piece 6 Inch Heavy Wall Heat Shrink Red and Black Tubing Assortment

    QTY 6" PCS DESCRIPTION PART# 2 14-6 AWG 0.4”, Black HST806B 2 14-6 AWG, 0.4” Red HST806R 2 8-1 AWG, 0.8” Black HST808B 2 8-1 AWG, 0.8” Red HST808R 2 12-4/0 AWG, 1.1” Black HST809B...

    Regular price $25.49 USD
    Sale price $25.49 USD Regular price
  • 3:1 Heavy Wall Heat Shrink Tubing - Adhesive-Lined - 1.5" ID - Black - 6" Length - Fits 3/0-4/0 AWG

    This 1.5" heavy wall adhesive-lined heat shrink tubing is built for high-performance electrical insulation in rugged environments. With...

    Regular price $6.99 USD
    Sale price $6.99 USD Regular price
  • Heavy Dual Wall 3M Adhesive-lined Heat Shrink Tubing 3:1 Black 2" ID 250-750 MCM - 6" Inch 1 Each

    Shrink Ratio: 3 to 1 A sturdy, heavy wall tubing with excellent insulating, abrasion-resisting, and strain-relieving properties. The...

    Regular price $8.99 USD
    Sale price $8.99 USD Regular price
  • Heavy Dual Wall 3M Adhesive-lined Heat Shrink Tubing 3:1 Black 4.5" ID 1500-2500 MCM 6" Inch 1 Each

    Shrink Ratio: 3 to 1 A sturdy, heavy wall tubing with excellent insulating, abrasion-resisting, and strain-relieving properties. The...

    Regular price $22.99 USD
    Sale price $22.99 USD Regular price
  • Heavy Dual Wall 3M Adhesive-lined Heat Shrink Tubing 3:1 Black 3" ID 600-1250 MCM - 6" Inch 1 Each

    Shrink Ratio: 3 to 1 A sturdy, heavy wall tubing with excellent insulating, abrasion-resisting, and strain-relieving properties. The...

    Regular price $23.49 USD
    Sale price $23.49 USD Regular price
  • Heavy Dual Wall 3M Adhesive-lined Heat Shrink Tubing 3:1 Black 6" ID 2.1"-4.8" Range 6" Inch 1 Each

    Shrink Ratio: 3 to 1 A sturdy, heavy wall tubing with excellent insulating, abrasion-resisting, and strain-relieving properties. The...

    Regular price $36.49 USD
    Sale price $36.49 USD Regular price
  • 0.80" Heat Shrink Tubing - 3:1 Ratio - Heavy Wall Adhesive-Lined - 6" Length

    This 0.80" ID 3:1 heavy wall adhesive-lined heat shrink tubing is built for extreme-duty applications requiring high insulation,...

    Regular price $5.49 USD
    Sale price $5.49 USD Regular price
  • 0.30" Heat Shrink Tubing - 3:1 Ratio - Heavy Wall Adhesive-Lined - 6" Length

    This 0.30" ID 3:1 heavy wall adhesive-lined heat shrink tubing provides robust insulation and environmental sealing for critical...

    Regular price $4.49 USD
    Sale price $4.49 USD Regular price
  • 1.10" Heat Shrink Tubing - 3:1 Ratio - Heavy Wall Adhesive-Lined - 6" Length

    This 1.10" ID 3:1 heavy wall heat shrink tubing delivers robust insulation, abrasion resistance, and sealing for high-demand...

    Regular price $6.99 USD
    Sale price $6.99 USD Regular price
  • 0.40" Heat Shrink Tubing - 3:1 Ratio - Heavy Wall Adhesive-Lined - 6" Length

    This 0.40" ID 3:1 heavy wall adhesive-lined heat shrink tubing is engineered for sealing and insulating electrical connections...

    Regular price $5.49 USD
    Sale price $5.49 USD Regular price
  • Heavy Dual Wall 3M Adhesive-lined Heat Shrink Tubing 3:1 Black 7" ID 2.5"-5.6" Range 6" Inch 1 Each

    Shrink Ratio: 3 to 1 A sturdy, heavy wall tubing with excellent insulating, abrasion-resisting, and strain-relieving properties. The...

    Regular price $47.99 USD
    Sale price $47.99 USD Regular price