How is this sleeve measured? Are the listed sizes diameters or are they the measurements of the sleeve when layed flat?

Actually, the perimeter of a 3/4" diameter pipe is 2-3/8".

Will the 1.5 inch sleeve fit over a 1.5 inch radiator hose, or will it be too snug?

if the radiator hose is truly a 1.5" o.d and straight then yes it will fit, but if the hose expands as rubber does, then it will be greater than 1.5" and it may split the sleeve, If it is a curved hose then it will be greater than 1.5" o.d. in portions and the sleeve will not fit. You would not want to put this on a radiator hose as it would trap heat and not allow the radiator hose to radiate and dissipate heat properly. If the hose is not carrying hot water but merely used as a drain hose, then this is fine. This it meant to protect from radiant heat but also retains heat internally which could cause your rubber hose to fail prematurely and due to being obscured by the wrap you could not inspect the hose for sponginess, cracking or impending failure. Basically, not a good idea for that purpose.

What is the inside diameter

The product is in a roll. The diameter is what ever you make it.

Can this be used on the egr valve tube

Yes, the Design Engineering 010418 Heat Sheath can be used on the EGR valve tube. The inner diameter of the heat sheath is 0.5 inches, which is larger than the inner diameter of most EGR valve tubes (typically 0.4 inches). This means that the heat sheath will fit snugly over the EGR valve tube and provide protection from heat.

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DEI Heat Sheath Aluminized Heat Sleeve 3/4" ID x 3 ft Heat Protection

DEI Heat Sheath Aluminized Heat Sleeve 3/4" ID x 3 ft Heat Protection

Product ID: 7124081

Details

Brand
Design
Item Thickness
1 Inches
Material
Aluminum
Product Dimensions
10"L x 4"W
Recommended Uses For Product
auto racing

🔥Reflects radiant heat up to 2000°F

⚙️Easy slip-on installation, no tools needed

🛡️Heavy-duty abrasion & chemical resistance

¥6038

Duties & taxes included

In stock

Sold byAmazon JapanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔥 Shield your ride with pro-level heat armor!

BUILT TO LAST - Heavy-duty 19 oz fiberglass insulation with aluminized outer layer for unmatched abrasion and chemical resistance.
ALL WEATHER SHIELD - Protects hoses and wiring from oil, fuel, chemicals, dirt, and road grime in any environment.
EFFORTLESS UPGRADE - Slip-on design means quick installation—no special tools or hassle required.
PRO GRADE RELIABILITY - Trusted by automotive pros and racers for durable, fire-resistant thermal protection.
ULTIMATE HEAT DEFENSE - Reflects intense radiant heat up to 2000°F, keeping your components cooler and safer.

The DEI Heat Sheath Aluminized Heat Sleeve is a 3/4" ID x 3 ft high-temp protective sleeve designed to reflect radiant heat up to 2000°F and withstand direct heat up to 500°F. Constructed from 19 oz fiberglass insulation bonded to a durable aluminized outer layer, it offers superior abrasion, chemical, and fire resistance. Easy to install with a slip-on design, it protects hoses, wiring, and cables from heat damage, oil, chemicals, and debris, making it a top choice for automotive and industrial applications.

Specifications

ASIN	B000E267M4
Best Sellers Rank	#5,713 in Automotive ( See Top 100 in Automotive ) #8 in Automotive Replacement Exhaust Heat Wrap, Matting & Sleeving
Brand Name	Design Engineering
Customer Reviews	4.7 4.7 out of 5 stars (1,206)
Global Trade Identification Number	00607078104038
Included Components	Design Engineering 010403 Heat Sheath 3/4" I.D. x 3ft Aluminized Sleeving for Ultimate Hi-Temp Protection
Item Dimensions L x W	10"L x 4"W
Item Thickness	1 Inches
Item Type Name	Aluminized Sleeving for Ultimate Hi-Temp Protection
Item Weight	0.2 Pounds
Manufacturer	Design Engineering, Inc.
Manufacturer Part Number	10403
Manufacturer Warranty Description	Warranty
Material Type	Aluminum
Model Number	10403
Part Interchange Info	010403
Recommended Uses For Product	auto racing
UPC	607078104038
Unit Count	3.0 Feet

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