Techflex ThermaShield Wrap, Adhesive Edge, 1-1/4” Diameter, Silver
Quick Overview
- Techflex ThermaShield Wrap, 1-1/4" (31.8 mm) wrapped diameter, 4-1/4" sheet
- Aluminized fiberglass: reflects radiant heat, rated to 1,200 degrees F
- Wraps around assembled hoses, harnesses and connectors; adhesive edge seals it
- Fits -16 rubber and -16 PTFE
- Sold by the foot; cuts with scissors
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$3.76
per Feet (USD)Techflex ThermaShield Wrap, 1-1/4" Wrapped Diameter, Adhesive Edge, Sold by the Foot
Flat aluminized fiberglass that wraps around hoses, harnesses and connectors already in place and seals along its edge with high-temperature adhesive: reflects radiant heat.
Techflex ThermaShield Wrap is a flat sheet of fiberglass with a laminated aluminum face and a strip of permanent, high-temperature adhesive along one edge. Racetronix is a Techflex distributor. Wrap it around the line and press the edge down: the adhesive grips anywhere across the width of the sheet, so it closes snugly over odd shapes such as connectors, sensor plugs and terminations. Nothing has to be disconnected. This size wraps to 1-1/4" (31.8 mm) diameter from a 4-1/4" wide sheet. Sold by the foot.
Key features
- Wraps on over assembled hoses, harnesses and connectors: nothing to disconnect.
- High-temperature adhesive edge that bonds anywhere along the width, for a snug fit around odd shapes.
- Reflects radiant heat; the maker rates the ThermaShield family to 1,200°F (649°C) without damage.
- In the maker's test at 626°F (330°C) for one hour, ThermaShield stayed intact while a competing product burned and delaminated.
- Non-combustible; meets FAR 25; minimum -76°F (-60°C). Cuts with scissors. Sold by the foot.
Which size fits my hose?
This size suits: -16 rubber; -16 PTFE.
Choose the size whose wrapped diameter is equal to or just larger than the outside of your hose, bundle or connector. The adhesive grips anywhere across the sheet, so a size up still closes neatly, with more overlap.
Hose outside diameters are nominal values from our own hose pages. Measure your hose if in doubt.
ThermaShield Wrap chart: all sizes
| Part | Wrapped diameter | Diameter (mm) | Sheet width | Wall | Weight per foot |
|---|---|---|---|---|---|
| 299-TWN0.50SV | 1/2" | 12.7 | 1-13/16" | 0.025" | 0.026 lb |
| 299-TWN0.75SV | 3/4" | 19.0 | 2-1/2" | 0.025" | 0.040 lb |
| 299-TWN1.00SV | 1" | 25.4 | 3-3/8" | 0.025" | 0.051 lb |
| 299-TWN1.25SV | 1-1/4" | 31.8 | 4-1/4" | 0.025" | 0.057 lb |
| 299-TWN1.50SV | 1-1/2" | 38.1 | 5" | 0.025" | 0.065 lb |
| 299-TWN1.75SV | 1-3/4" | 44.4 | 5-13/16" | 0.025" | 0.074 lb |
| 299-TWN2.00SV | 2" | 50.8 | 6-11/16" | 0.025" | 0.084 lb |
| 299-TWN2.25SV | 2-1/4" | 57.1 | 7-3/8" | 0.025" | 0.095 lb |
All sizes are silver and sold by the foot.
Equivalents: other brands' wrap-around heat sleeve
Shopping for another brand? These are wrap-around aluminized heat sleeves for the same diameters. They close with hook-and-loop instead of an adhesive edge, so they are near equivalents.
| Our part | Instead of (brand) | Their part number | Description | Match |
|---|---|---|---|---|
| 299-TWN0.50SV | DEI | 010405 | Heat Shroud, hook-and-loop, fits 1/2"-1-1/4", 3 ft | Near equivalent (hook-and-loop closure) |
| 299-TWN0.50SV | Thermo-Tec | 14030 / 14031 | Express Heat Sleeve 1/2"-1", 3 ft / 12 ft | Near equivalent (hook-and-loop closure) |
| 299-TWN0.75SV | DEI | 010405 | Heat Shroud, hook-and-loop, fits 1/2"-1-1/4", 3 ft | Near equivalent (hook-and-loop closure) |
| 299-TWN0.75SV | Thermo-Tec | 14030 / 14031 | Express Heat Sleeve 1/2"-1", 3 ft / 12 ft | Near equivalent (hook-and-loop closure) |
| 299-TWN1.00SV | DEI | 010405 | Heat Shroud, hook-and-loop, fits 1/2"-1-1/4", 3 ft | Near equivalent (hook-and-loop closure) |
| 299-TWN1.00SV | Heatshield Products | 274100 / 274101 | Thermaflect Sleeve, hook-and-loop, 1" x 3 ft / 10 ft | Near equivalent (hook-and-loop closure) |
| 299-TWN1.00SV | Thermo-Tec | 14030 / 14031 | Express Heat Sleeve 1/2"-1", 3 ft / 12 ft | Near equivalent (hook-and-loop closure) |
| 299-TWN1.00SV | Thermo-Tec | 14035 / 14036 | Express Heat Sleeve 1"-1-1/2", 3 ft / 12 ft | Near equivalent (hook-and-loop closure) |
| 299-TWN1.25SV | DEI | 010405 | Heat Shroud, hook-and-loop, fits 1/2"-1-1/4", 3 ft | Near equivalent (hook-and-loop closure) |
| 299-TWN1.25SV | Thermo-Tec | 14035 / 14036 | Express Heat Sleeve 1"-1-1/2", 3 ft / 12 ft | Near equivalent (hook-and-loop closure) |
| 299-TWN1.50SV | Thermo-Tec | 14035 / 14036 | Express Heat Sleeve 1"-1-1/2", 3 ft / 12 ft | Near equivalent (hook-and-loop closure) |
Other brands' names and part numbers are their owners' trademarks, listed only to help you compare. Check sizes against your application.
Specifications
| Construction | Aluminum-laminated fiberglass sheet; permanent high-temperature adhesive strip along one edge |
| Wrapped diameter | 1-1/4" (31.8 mm) |
| Sheet width | 4-1/4" |
| Wall | 0.025" (0.6 mm) |
| Temperature | Up to 1,200°F (649°C) without damage (maker's family rating); minimum -76°F (-60°C) |
| Flammability | Non-combustible; meets FAR 25 |
| Abrasion | Very high (maker's test) |
| Cutting | Scissors |
| Sold as | By the foot, silver |
Installing ThermaShield Wrap
- Clean and dry the line. Keep oil off the adhesive strip.
- Cut the length you need with scissors.
- Lay the sheet around the hose, harness or connector with the aluminized face out.
- Peel the backing from the adhesive strip and press the edge down along its whole length, working from one end.
- Where you can, turn the seam away from the heat source.
Which heat protection do I need?
Heat reaches a hose or wire in three ways, and each needs a different kind of protection.
- Radiant heat. A header or turbo throws heat out in every direction, like a stove element, and it reaches anything in line of sight. Reflective foil stops it best: the aluminized face bounces it back before it gets in.
- Heat soak. Hot air and nearby hot parts warm a line slowly and steadily. Insulation stops it. Braided fiberglass traps thousands of tiny pockets of still air, the same way the insulation in a house wall does, and still air carries heat very poorly. Squash the fiberglass and the air goes, and most of the insulation with it.
- Flame, sparks and splash. A burst line, a backfire or weld spatter. This needs a covering that will not burn: a silicone jacket or a non-flammable fibre.
Foil-over-fiberglass products combine the first two: the foil reflects, the fiberglass insulates. Nothing should rest against a bare header; wrap the header, shield the line, or both.
| Situation | Use | Why it works |
|---|---|---|
| The exhaust itself: headers, down pipes, turbo crossovers | Header wrap | Keeps the heat inside the pipe, so far less of it radiates onto the hoses, wiring and bodywork around it. The best fix is usually at the source. |
| A hose or harness close to a header or turbo (strong radiant heat) | T6 ThermaShield split tube or ThermaShield Convoluted | The aluminized face reflects most of the radiant heat before it gets in, and the fiberglass behind it insulates against what does get through. |
| A firewall, floor pan, fuel cell or ECU box facing the exhaust | ThermaShield Flat or ThermaShield Wrap | The same foil over fiberglass, as a sheet that sticks on or wraps around odd shapes. |
| Lines in a hot engine bay: steady heat soak, little direct radiant heat | FireFlex fire sleeve | A thick layer of fiberglass holds still air, which insulates; the silicone jacket seals out oil, fuel and splash. Leave at least 1/8" of air gap so the fiberglass is never squashed. |
| Single wires, sensor and thermocouple leads near heat | Insultherm Tru-Fit fiberglass sleeving | A thin fiberglass braid that insulates without adding bulk. |
| Plug wire boots close to the headers | Insultherm spark plug boot sleeves | Double-thick fiberglass where the boot sits closest to the pipe. |
| Flame, sparks, weld spatter or molten splash | Dragon Sleeve, or FireFlex if the line also needs insulating | Dragon fibre will not burn and shrugs off sparks, but its thin wall holds little air, so it does not insulate much. FireFlex resists splash and insulates. |
All the lines compared:
| Product | What it is | Heat it handles | Continuous rating | How it fits | Best for |
|---|---|---|---|---|---|
| Techflex FireFlex fire sleeve | Thick fiberglass braid with a silicone jacket | Direct heat, open flame, oil and fuel splash | 500°F (260°C) | Slides on before the hose ends go on | Fuel, oil, brake and clutch lines near headers or turbos |
| Techflex T6 ThermaShield split tube | Aluminized fiberglass tube, split, closes with an adhesive strip | Reflects radiant heat | 491°F (255°C) material; reflects radiant heat from a 1,400°F source at 3/8" | Wraps around: no need to remove fittings | Assembled hoses and harnesses near exhaust |
| Techflex ThermaShield Convoluted | Seamless aluminized fiberglass, flexible convoluted tube | Reflects radiant heat | Not published | Slides on | Hoses and wires that bend in several directions |
| Techflex ThermaShield Flat (full adhesive) | Flat aluminized fiberglass with a full adhesive back | Reflects radiant heat | Not published | Sticks to any clean surface | Firewalls, floor pans, fuel cells, ECU boxes |
| Techflex ThermaShield Wrap (adhesive edge) | Flat aluminized fiberglass joined along one edge by adhesive | Reflects radiant heat | Not published | Wraps around odd shapes | Connectors, sensors, short runs |
| Techflex Insultherm Tru-Fit fiberglass sleeving | Acrylic-treated braided fiberglass | Direct heat, no flame or fluid seal | 464°F (240°C) | Slides on | Individual wires, thermocouple and sensor leads |
| Techflex Insultherm spark plug boot sleeves | Double-thick fiberglass sleeves, 7-1/2" long | Direct heat at the header | 1,200°F | Slips over the boot | Plug wire boots close to headers |
| Techflex header wraps: Insultherm, Header Wrap SI, Volcano Wrap | Woven tape wrapped around the pipe | Keeps heat inside the exhaust | Fiberglass 1,200°F; silica 2,000°F; basalt 1,300°F | Wrapped with 1/4" overlap, tied at the ends | Headers, down pipes, turbo crossovers |
| Techflex Dragon Sleeve | Thin double-wall braid of non-flammable Dragon fibre | Flame, sparks, weld spatter, molten splash; not an insulator | None published; the fibre decomposes at 842°F (450°C) | Slides on; the braid expands | Lines and wires exposed to sparks or open flame |
| Techflex Weld Wrap HD | Silicone-coated silica braid with hook-and-loop closure | Weld spatter, slag, sparks; heat | 500°F (260°C) continuous; 2,000°F (1,093°C) intermittent | Wraps on with hook-and-loop | Welding leads and hoses; lines that see sparks |
Frequently asked questions
ThermaShield Wrap or the T6 split tube?
Both are foil over fiberglass and both go on an assembled line. Wrap is a flat sheet sold by the foot that closes anywhere across its width, so it suits connectors and odd shapes. T6 is a preformed round tube in 4 ft pieces, made for round hoses: see T6 ThermaShield.
ThermaShield Wrap or ThermaShield Flat?
Wrap has adhesive only along one edge and closes around itself. ThermaShield Flat has adhesive over the whole back and sticks onto a surface, such as a firewall or electronics box.
Can I use it on the exhaust pipe itself?
No. It protects lines and wiring from a nearby heat source. Wrap the pipe with header wrap.
Ratings are the maker's published figures.
