Design Engineering Titanium Protect-A-Sleeve with LR Technology offers the best possible sleeve protection on the market today. Developed specifically for any application where extreme high heat is present, these Titanium sleeves will protect wires, lines and cables when exposed up to 1800 degrees Fahrenheit direct heat or 2500 degrees Fahrenheit radiant heat. Developed with DEI’s proprietary LR Technology, these high temperature rated sleeves provide superior thermal protection for street vehicles or race engines, protecting fuel, oil lines, spark plug and electrical wires from direct or under hood radiant heat. The 1/2″ interior diameter sleeves will fit many of today’s larger diameter spark plug wires for protection against hot exhaust manifolds and headers. Water and heat resistant, they are also ideal for Powersports – ATV/UTV, motorcycle, personal watercraft, snowmobiles, and marine use.
- Titanium Sleeves Will Protect Wires, Lines, And Cables, Or Any Application Where Extreme High Heat Is Present
- Capable Of Withstanding Temperatures Up To 1800 Degrees Fahrenheit Direct Heat And 2500 Degrees Fahrenheit Radiant Heat
- 1/2-Inch Id Will Fit Larger Spark Plug Wires And Protect Them From Hot Exhaust Manifolds And Headers
- Superior Thermal Protection For Street Vehicles Or Race Engines














J. Toste –
Used this product for relocation of a fuel injection line vulnerable to heat and abrasion – even though this line is .5 inch (12.7mm) ID, it fit perfectly over my 13.5mm OD line by using the ‘chinese finger puzzle’ method (it will expand a bit when you push the ends together, then you can smooth it out for an exact fit). Heat shrink tubes are essential to prevent a frayed look at each end, and happily this roll comes with ten of them! Very pleased with this product!
Manuel Francia –
Didn’t use them for my intended purpose as they wouldn’t slip over my spark plug cable so ended up using them to dress up my fuel lines. Worked great and a little added extra touch to match my pipe wraps on a cafe racer. Followed instructions and some YouTube vids. I have a bunch left over in case I replace my spark plug wires in the future.
Outspoken RN –
Don’t listen to the other reviews that have one start, they’re unaware that the rubber boot on the ends of spark plugs comes off, THEN you put the insolation on. I use these mainly for fuel lines to avoid vapor lock. Also used on starter cable that’s hating life next to a header. FYI; if you’re going to cut it, wrap the section to be cut w electric tape first, and cut through tape. Makes cutting precise and it won’t fray out.
Seth R. –
Works well as advertised, my complaint is the dei branded heat shrink only comes in a smaller size, and doesn’t hold the wrap in place well. I used metal zip ties instead.
Brian Boldt –
Used on spark plug wires that i wanted hidden, so far, so good with protection from burning the wires that are touching the engine block
Dude –
Great product
Colt –
They look good and keep heat off the wires
Travis Luther –
Frays a lot when cut. Put the heat shrink material on first before cutting or you’ll have a heck of a time getting it over the frayed material.