What is the R value of the 1.18"?

This is a good question that unfortunately I cannot readily answer looking at the description of the item which states: Good thermal insulation Rubber insulation pipe adopts closed cell structure, low thermal conductivity, stable temperature, and has the function of thermal insulation.....if we take the verbiage they elect to use indicates it "adopts" closed cell structure. Really !? it adopts ? So is it or isn't it ? It goes on to say it "has the function of thermal insulation", well I would think so !! Proclaiming it has the function as opposed to stating that it has the function....perhaps something is getting lost in translation... If I take what they say literally, i.e. that the material is in fact "closed cell rubber" then the following would apply to your question: This is closed-cell foam rubber, on the other hand, becomes rigid upon application and has an R-value range of 6 to 7.

Can this be used on underground sewage lines?

I suppose it depends how far underground and what kind of material (rocks / aggregate / sand etc.) it would be exposed to, it would eventually break down over time and or get crushed from the weight / force around it... it's not designed to be buried under ground , if you do, you do so at your own risk...

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Water Pipe Insulation Tubing 3/4" 1" 1-1/4" 1-1/2" 2" 2-1/2" 3" 3-1/2" 4" Inner Diameter Foam Tube Insulation for 0.79"/1.18" Thick Wall Insulation Lagging Wrap(0.79",ID 1-1/4")

Water Pipe Insulation Tubing 3/4" 1" 1-1/4" 1-1/2" 2" 2-1/2" 3" 3-1/2" 4" Inner Diameter Foam Tube Insulation for 0.79"/1.18" Thick Wall Insulation Lagging Wrap(0.79",ID 1-1/4")

Product ID: 542958102

Details

Brand
Plerile
Item Thickness
20 millimeters
Manufacturer
SYSMG
Material
Rubber

✂️Easy cut & glue installation

🌡️Low thermal conductivity 0.79" thick wall

🛡️Flame retardant & waterproof protection

8619 som

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Description

🛠️ Wrap it right, save energy tight!

DIY FRIENDLY - No extra layers needed—just cut, glue, and wrap for a hassle-free, professional finish.
ALL SIZE COVERAGE - From 3/4" to 4" inner diameters, find your perfect fit for seamless insulation and protection.
BUILT FOR EXTREMES - Industrial-grade flame retardant and waterproof design stands strong against snow, rain, and blazing heat.
VERSATILE PROTECTION - Not just pipes—perfect for fitness handles, hoses, and more, blending function with everyday style.
ULTIMATE THERMAL SHIELD - Closed-cell rubber foam locks in heat, slashing energy loss and keeping pipes safe in any weather.

This premium closed-cell rubber foam pipe insulation tubing offers superior thermal insulation with a 0.79" thick wall, available in a full range of inner diameters from 3/4" to 4". Engineered for extreme weather resistance, it is flame retardant, waterproof, and easy to install with simple cut-and-glue application. Ideal for protecting water pipes, hoses, and even fitness equipment handles, it delivers durable, energy-saving performance for both residential and commercial use.

Specifications

ASIN	B0BP267C57
Best Sellers Rank	#502,867 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #484 in Pipe Insulation
Brand Name	Plerile
Coverage	Thermal insulation, weather protection, and impact absorption
Customer Reviews	4.0 4.0 out of 5 stars (176)
Item Thickness	20 millimeters
Manufacturer	SYSMG
Manufacturer Part Number	DXKEJAEKZ-E050CD1E
Material Type	Rubber
Model Number	DXKEJAEKZ-E050CD1E
Number of Items	1
Recommended Uses For Product	Heat insulation for water pipes, hoses, protection for fitness equipment handles, and various other occasions.
Unit Count	1 Count

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