BuyHeatShrink® 3:1 Heavy Wall Adhesive-Lined Heat Shrink Tubing — Bulk Value Pricing
Triple-Wall Heat Shrink Features
3:1 shrink ratio with melt-adhesive inner lining (shrinks to one-third of its original diameter)
Longitudinal shrinkage: up to 10%
Meets AMS-DTL-23053/15 (formerly MIL-I-23053/15), Class 1
UL 224 VW-1 flame retardant (jacket only)
UL 486D rated for direct burial
Dielectric strength: 500 V/mil (Calculated as 500 × jacket wall thickness × 1000; for example, a typical post-shrink wall thickness of 0.10" yields approximately 50,000V / 50kV)
BuyHeatShrink® 3:1 Heavy Wall Adhesive-Lined Heat Shrink Tubing is now available in bulk quantities at discounted rates. Designed for professionals who need dependable performance at scale, this product offers greater savings as order volume increases—making it ideal for contractors, manufacturers, utilities, and high-volume installers.
Engineered for demanding environments, this triple-wall heat shrink provides superior insulation, waterproof sealing, and mechanical protection for both exposed and underground applications.
Our 3:1 heavy wall adhesive lined heat shrink tubing is ideal for direct burial of heavy duty electrical cables, where environmental protection is necessary. This high quality triple wall heat shrink tubing is supplied with an inner adhesive layer, adding a water tight seal to the strain relief the tubing provides. When exposed to heat (usually a bit lower than the activation temperature of the heat shrink), the inner layer begins to flow (just like a hot melt glue). When the tubing shrinks and cools down, the inner layer forms an adhesion layer between the tubing and the component or wire. This provides a watertight seal, protecting the connector and/or wire in direct burial and submersed applications. Meets requirements of AMS-DTL-23053/15 (formerly MIL-I-23053/15), Class 1; UL 224 VW-1 flame retardant (jacket only); UL 486D rated for direct burial; dielectric strength 500 V/mil (500 x Jacket Wall thickness x 1000). Crosses to Canusa CFW, 3M HDT, 3M ITCSN, Tyco Raychem RHW, LG PHWT
Industry Cross-References
Canusa CFW
3M HDT
3M ITCSN
Tyco Raychem RHW
LG PHWT
Typical Applications
Electrical insulation for exposed or underground installations
Waterproofing and environmental sealing
Mechanical and abrasion protection
Physical and electrical protection of components
Strain relief and solder insulation
Bulk Purchasing Benefits
Lower per-unit cost as quantities increase
Ideal for large projects, repeat jobs, and inventory stocking
Consistent BuyHeatShrink® quality with cost-efficient bulk savings
Stock up and save—this heavy-wall adhesive-lined heat shrink tubing delivers proven performance and better value the more you buy.
