Model # SP57/11C

Internet #100139225

Store SKU #417920

Store SO SKU #923710

null Fiberglass Water Heater Insulation Blanket
0077578023946

Fiberglass Water Heater Insulation Blanket

  • For use with both gas and electric water heaters
  • Reduces water heater recovery time to save energy
  • Durable fiberglass body with R-10 insul.,Fits up to 60-gal tank
$21.57 /each

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Product Overview

The Thermwell Products Co. Inc. Fiberglass Water Heater Insulation Blanket fits up to a 60-gal. tank. It is compatible with both gas and electric water heaters. This blanket helps you save energy by reducing your water heater's recovery time.

  • For use with both gas and electric water heaters
  • Fits up to a 60-gal. tank
  • Insulates a water heater
  • Reduces water heater recovery time to save energy
  • Durable fiberglass body with R-10 insulation

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Customer Questions & Answers

7 Questions18 Answers

Customer Questions & Answers

Fiberglass Water Heater Insulation Blanket
Fiberglass Water Heater Insulation Blanket

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6 answers

What's the r rating on the water heater blankets?

This question is from Fiberglass Water Heater Insulation Blanket
Asked by
Mesa, Az
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August 15, 2013
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Answers (6)

October 26, 2014
Answer: 
Frost King model number SP57/11C is an R-10
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December 31, 2013
Answer: 
The fiberglass blanket I used had an r value of 11
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December 29, 2013
Answer: 
Around R-10.
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Asked by
Alabama
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December 14, 2013
Answer: 
Some are 3.5, some are 6.5, and some are 10. The Frost King SP57/11C is a R-10. Don't believe the packages though when they say "Acts like R-19". Some of those actually have very low R rated like around 3.5. Any one you look at should have the specs on the package
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Asked by
Green Bay, WI
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December 11, 2013
Answer: 
Depends on the thickness of the insulation and type of insulation. Each bag should have the R value on it.
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Asked by
Cedar City, UT
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August 15, 2013
Answer: 
Its a measure of thermal resistance. In simple terms: how good it is as insulating. It is affected by a number of factors such as type of material, thickness, number of layers, etc. The higher the number the better insulation. With this type of product, they will all be around R-10.
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3 answers

why not just buy bag of r-13 insulation and cut it in pieces and tape it to fit around any water heater.

This question is from Fiberglass Water Heater Insulation Blanket
Asked by
bangor, pa.
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July 29, 2014
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Asked by
Overland Park, KS
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March 3, 2015
Answer: 
A Blanket by design should be an easier installation and look better cosmetically.
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Asked by
Portland
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February 3, 2015
Answer: 
Technically I suppose you could, but if you do the math, by the time you add up the cost of the roll of insulation, the half mile of tape you'll need, the extra 2 hours you'll spend fighting to end up with a decent job, which should include a final wrap of an opaque 3 to 6 mil plastic, you'll wish you'd just gone ahead and purchased this product to begin with. Trust me, I'm a do it yourself-er from way Read More
Technically I suppose you could, but if you do the math, by the time you add up the cost of the roll of insulation, the half mile of tape you'll need, the extra 2 hours you'll spend fighting to end up with a decent job, which should include a final wrap of an opaque 3 to 6 mil plastic, you'll wish you'd just gone ahead and purchased this product to begin with. Trust me, I'm a do it yourself-er from way back, and if I could save a buck by doing it like you've suggested, I would have. But when I figured out that while I was trying to save on material costs, (which often as not I didn't), I ignored the value of my time and aggravation, and all tolled, it seldom paid off. Recommendation: buy the blanket kit; be done in 10 minutes; look like a pro; and spend the time you'll save playing with the kids. Read Less
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Asked by
New Jersey
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July 30, 2014
Answer: 
Yes that is possible, except there would be no instructions for safety issues and proper installation, and the multiple pieces would require multiple seams and would not be as effective as a single piece with only one edge to seal.
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3 answers

my water heater is a 40 gal. and I am having a hardtime finding a blanket to fit. do you carry a blanket at least 70 to 72 in. ?

This question is from Fiberglass Water Heater Insulation Blanket
Asked by
klite
lemon grove
May 2, 2013
i have a 40 gallon water heater. will this blanket fit?
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October 26, 2014
Answer: 
I just used this on my 40 gallon tank and it fit without a problem.
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Asked by
Cedar City, UT
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May 3, 2013
Answer: 
Home Depot carries water heater blankets in different sizes. Make sure you measure both the circumference and height of your water heater and pick out a blanket that has the same dimensions. Don't bother looking at gallon size.
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Asked by
New Jersey
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May 3, 2013
Answer: 
The Water Heater Blankets carried at The Home Depot are 48" tall X 72" which should fit most water heaters.
Start the Blanket at the top edge of the water heater and wrap around.
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3 answers

How wide is your water heater blanket - My water heater is 69.5" around. 66 GALLON. Do YOU HAVE ONE TO FIT IT?

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Asked by
mr fixit
November 3, 2012
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Asked by
New Smyrna Beach, FL, USA
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January 7, 2013
Answer: 
Unfortunately Home Depot does not have one that will fit that size
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Asked by
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November 21, 2012
Answer: 
as long as u simply only wrap around the water heater(not blocking anything) you can buy the biggest size insulation blanket and if it does not fit then you could probably insert a strip of your own insulation where it will not reach.., use plenty of white duct tape.., then again the assistant at the store may help you find the right size.
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November 5, 2012
Answer: 
Our Blankets are 48" tall and 75" wide to fit most standard water heaters. It should fit yours.
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Customer Reviews

Rated 3.3 out of 5 by 78 reviewers.
Rated 2.0 out of 5.0 by Dosn't fit 40 gal "fat boy" electric water heater This is advertised as a "universal" fully encapsulated fiberglass backed with PVC, 48" x 75". I have a Whirlpool "fatboy" 40 gal electric hot water tank, 22 in in diameter with 69 1/2 in circumference. It did not fit around that. I ended up having to stretch it and use the tape that was supposed to be a continuous vertical strip to seal the two ends in 12 inch strips placed horizontally at about 16 inch intervals to hold it in place and close it as best I could. It was also not "full encapulated but had thin plastic/pvc sheet on one side. Overall, it's Ok as is and not worth taking the time to return but it is far from "as advertised" Universal????? Ha, Ha. Ha. May 15, 2016
Rated 1.0 out of 5.0 by Too small water heater blanket The product claims to insulate up to a 60 Gallon Hot Water heater tank. I have a 50 Gallon electric Hot Water Heater, and it did not even wrap around the entire tank. There was not enough insulation to cover the top either. It was also advertised as 3 inches of Insulation thickness, that was not true either. Do not buy this product unless you measure the tank first. July 23, 2016
Rated 3.0 out of 5.0 by Barely Fits around 50 gal water heater Package says fits up to most 60 gal water heaters. It barely fit around my 50 gal. I have an electronic Whirlpool water heater and it kept messing up due to the cold so that is why I bought this. It does serve the purpose of covering up the digital display and keeping it warm. It actually did not completely fit around my water heater. There is probably a 2-3 inch gap where I had to tape it to the water heater all the way down for it to stay. If I would have stretched it probably would have fit, but if you compress insulation it decreases its R-value which defeats the purpose. I also must say that the tape that comes with it works extremely well. December 14, 2013
Rated 3.0 out of 5.0 by "Up to" 60 Gallons...if you by the correct model number I couldn't help but notice how almost everyone commented on the fact that there wasn't enough material. Pay attention to the model number - SP57-11C. If you go to the Frost King website, you'll see there's another model SP60 which is 90 inches round vs. 75 inches. That's the model that fits up to 60 gallons. September 30, 2015
Rated 5.0 out of 5.0 by Easy install Easier to install with a little help from a 2nd person to hold it in place while cutting/taping in place. July 28, 2015
Rated 4.0 out of 5.0 by Product is ok but could be better. I installed the insulating blanket around a new 40 gal. electric GE water heater and just had enough to reach around the tank. I had no extra material to finish covering the top of the tank. For the price of the Kit they should include more material. Tip: For additional insulating value add an 1" block of high density foam under the tank, if an electric water heater. September 17, 2013
Rated 1.0 out of 5.0 by Product not as advertised on package labeling Its just a chunk of fiberglass with a chunk of plastic. The package labeling says it is "fully encapsulated" fiberglass insulation. Not the case. Buy a different product. If you want it "fully encapsulated" like the label says, you will have to cut your own plastic casing for the insulation. March 12, 2016
Rated 5.0 out of 5.0 by Best way to save electricity for heating hotwater This product is designed very well to insulate an water heater. I found it easy to install with only a knife. It wil continue to reduce our electric bill for as long as we have this water heater and I am hoping to transfer it to the next one we need to purchase. February 24, 2016
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