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Double Wall Fiberglass Sleeves Protect Wires & Spark Plug Boots to 1,200°F

For decades, Techflex’s Insultherm braided fiberglass sleeving has been the first choice among automotive professionals and enthusiasts alike for many of their thermal protection applications.

These innovative sleeves offer the same high temperature protection in an easy slip on sleeve that will extend the life of expensive spark plug wires by protecting them where they need it most... at the boot. Just slip these 3/4” diameter double thickness (triple thick at the sewn end) sleeves over any spark plug cable and boot (even right angle boots) to protect them from engine temperatures up to 1,200°F. Once installed, the sleeves require no clearance from hot surfaces, and can even rest directly on hot exhaust headers without affecting performance.

Insultherm Spark Plug Boot Sleeves are completely non-conductive, resist all engine chemicals, will not support combustion, and provide an easy, economical solution to the challenge of wire protection in the cramped, high temperature environment of any high performance engine compartment.

Black PET harness
PET Termination Solutions
PET Color Wheel Sample
Colors
Insultherm Spark Plug Boot Insulators are available in Natural, Red, Blue, and Black.
Natural Insultherm Spark Plug Boot
Natural (NT)
Red Insultherm Spark Plug Boot
Red (RD)
Blue Insultherm Spark Plug Boot
Blue (BL)
Black Insultherm Spark Plug Boot
Black (BK)
Sizes
Nominal
Size
Product
Part #
Diameter Wall Thickness Bulk Box Colors
No Ring-Easy Install
4 1/2"
7 1/2"
12"
FBN0.75
FCN0.75
FDN0.75
3/4"
3/4"
3/4"
.085"
.085"
.085"
144
144
144
**
With Ring
7 1/2" FCU0.75 3/4" .085" 144 4
**NT in-stock color; all other available by special order only NT, BL, BK, RD (available by special order only)
Specifications
Techflex makes every effort to ensure accuracy and completeness when describing the technical properties of our products. Customers are encouraged to test and evaluate the products for their own unique requirements.
Physical Properties
Monofilament Thickness (ASTM D-204) NA
Flammability Rating VW-1
Recommended Cutting Scissor
Colors 4
Wall Thickness .085
Tensile Strength - Yarn (ASTM D-2265) lbs. NA
Abrasion Resistance High/td>
Specific Gravity 1.0 - 1.8
Moisture Absorption % (ASTM D-570) .01
Hard Vacuum Data (ASTM E-595 at 10-5 torr)
TML .02
CVCM .01
WVR .00
Smoke D-Max (ASTM E-662) NA
Outgassing Low
Chemical Resistance

1=No Effect   2=Little Effect   3=Affected   4=More Affected   5=Severely Affected
Aromatic Solvents 1
Alipahtic Solvents 1
Chlorinated Solvents 1
Weak Bases 1
Strong Bases 1
Salt Water (O-S-1926) 1
Hydraulic Fluid (MIL-H-5606) 1
Lubricating Oil (MIL-L-7808) 1
De-Icing Fluid (MIL-A-8243) 1
Strong Acids 2
Strong Oxidants 2
Esters/Ketones 1
UV Light 2
Petroleum 1
Fungus (ASTM G-21) 1
Salts 1
Operating Temperatures
Minimum Continuous -94°F/-70°C
Maximum Continuous (MIL-I-23053) 1,202°F/650°C
Melt (ASTM D-2117) 2,048°F/1,120°C
Other Information
Halogen Free Yes
RoHS Yes
UL/CSA Yes
SVHC None
RoHs logo UL Logo
Downloads
Product Movie
Insultherm Spark Plug Boots Youtube Movie
Click the thumbnail to launch the movie.

104 Demarest Road Sparta, NJ 07871
9:00am - 5:30pm EST
973-300-9242
973-300-9409

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