Is the diameter on each tube the original size (pre-shrinking)?

Yes.Size is before shrinking,3/32 shrinks to 0.8mm. 1/8 shrinks to 1.1mm. 3/16 shrinks to 1.6mm. 1/4 shrinks to 2.1mm. 3/8 shrinks to 3.2mm. 1/2 shrinks to 4.2mm. 3/4 shrinks to 6.0mm

Can this be used to join two tubes together? Does the glue just seal the ends or the entire tube?

If the tubes and the heat shrink tubes fit snugly after heating them I'm sure it would work well. This is very durable heat shrink, thicker than most. Keep in mind also, it's 3:1 shrink. Glue throughout the tubing.

What is the max temperature on these heat shrink tubes? Can I put it in the car engine bay?

Operating temperature: -55℃～125℃.They can be used in an engine bay.

Our heat shrink tubing kits are produced in China,but I can say after using these on a number of projects and boat rewiring they don't leak or seem to be affected by oil/gas/saltwater,and they've held up over time which is all that matters.

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Eventronic 400 Pcs Heat Shrink Tubing Kit-3:1 Ratio Adhesive Lined,Marine Grade Shrink Wrap - Industrial Heat-Shrink Tubing - Black

Eventronic 400 Pcs Heat Shrink Tubing Kit-3:1 Ratio Adhesive Lined,Marine Grade Shrink Wrap - Industrial Heat-Shrink Tubing - Black

Product ID: 716713605

Details

Brand
Eventronic
Colour
Black
Indoor/outdoor use
Outdoor
Material
Polyvinyl
Style
Industrial

⚓Marine-grade durability

🔥3:1 shrink ratio for precise fit

🛡️Adhesive-lined for waterproof seal

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$59.37

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Sold byAmazon USADelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔥 Seal it. Shrink it. Secure it. The pro’s choice for flawless wiring.

SLEEK BLACK FINISH - Professional, low-profile look that blends seamlessly with any setup.
ULTIMATE PROTECTION - Adhesive lining creates a waterproof, corrosion-resistant barrier for long-lasting reliability.
MARINE GRADE TOUGHNESS - Built to withstand harsh environments, perfect for industrial and marine applications.
PRECISION FIT EVERY TIME - 3:1 shrink ratio ensures a snug, professional finish on all cables and wires.
VERSATILE KIT OF 400 PIECES - Comprehensive assortment covers all your wiring needs, eliminating last-minute runs.

The Eventronic 400 Pcs Heat Shrink Tubing Kit features a 3:1 shrink ratio with adhesive lining, delivering a waterproof, corrosion-resistant seal. Designed to meet marine-grade standards, this industrial-grade tubing kit offers a versatile, professional solution for protecting and organizing electrical connections in demanding environments.

Specifications

ASIN	B0BVVMCY86
Brand	Eventronic
Built-In Media	400 Pcs Heat Shrink Tubing Kit-3:1 Ratio Adhesive Lined
Color	Black
Customer Reviews	4.7 4.7 out of 5 stars (3,550)
Enclosure Material	Polyvinyl Chloride
Indoor Outdoor Usage	Outdoor
Manufacturer	Eventronic
Mfr Part Number	HST-400
Model Number	HST-400
Number of Pieces	400
Style Name	Industrial
Unit Count	400 Count

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