The Thermwell Products Co., Inc. 1/2 in. x 3 ft. Fiberglass Pipe Insulation is commercial grade and can be safely used immediately exiting furnace or water heater. It is pre-slit and self-sealing and made with reinforced foil and paper wrap.
For 1/2 in. pipe, 3 ft. long
Can be used on pipes exiting furnace or water heater
Q:Can I use this to insulate sprinkler pipes in an attic so they don't freeze??
by|Sep 18, 2023
1 Answer
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A: Yes this will help insulate your pipes. We cannot say if it will prevent them from freezing not knowing where in the US you live and we cannot predict extreme cold weather.
by|Sep 21, 2023
Q:Can the paper surface be painted?
by|Mar 22, 2023
1 Answer
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A: This vinyl covering will not hold paint like a hard surface.
by|Mar 24, 2023
Q:I use a bucket as a toilet when I go on camping trips and I?d like to know if I can get good cushioning if I put this around the rim where we sit.
by|Jan 26, 2023
1 Answer
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A: No it will not work because it is rigid fiberglass and it is made for straight runs of pipe and will not conform to the bucket.
by|Jan 26, 2023
Q:Can I use this on a hot line to a radiator
by|Nov 20, 2022
1 Answer
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A: This product is made for this type of installation.
by|Jun 2, 2023
1 found this answer helpful
Showing 1-4 of 44
Customer Reviews
3.9 out of 5
(118)
3.9
out of 118 reviews
68% recommend this product
5
61
4
19
3
15
2
7
1
16
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Showing 1-10 of 118 reviews
Mar 19, 2019
My main problem is that the inside diameter isn't 1.25 inches. It's more like 1.75. I question if...
My main problem is that the inside diameter isn't 1.25 inches. It's more like 1.75. I question if the R value is as high as it could be for this reason. If it were sized as described, I'd probably give it 3 or even 4 stars. I wrapped a nearby pipe with the typical product, the separate rolls of fiberglass and plastic, and it's a drag that takes 10 times as long and has a lower stated R value. That's how I can justify this product and its price. Warned by others of the adhesive failing, I used water-activated kraft paper packaging tape over the seams, knowing it's less likely to crap out when exposed to heat (in an attic). It adheres well to the product's exterior paper surface. If there were a better alternative for a hot pipe (or heat tape in my case), I wouldn't recommend this, but I don't know of one. Sometimes you have to improvise.
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Verified Purchase
Recommended
5 found this review helpful
Jan 24, 2014
Seal does not hold
I purchased about 45 pieces of this product in varying sizes. I used it around iron heat pipes in my basement. At first I was very happy with product . I installed all the pieces in about 1.5 hours. The next day
I returned to the basement and 90 percent of the pieces popped open. Attempted to reseal three times with similar results. Manufacture offered metal tape and/or replace items. I believe this is unsatisfactory because it does not take into account the time/labor/high product cost in having to redo job several times.
by
DIY
12 found this review helpful
Sep 6, 2023
I purchased the last 2 pieces available in this size. The reinforced paper exterior was mostly loose and separated from the fiberglass interior, apparently due to sitting on the shelf for so long. I will need to apply my own adhesive to the paper when I install it, along with added zip-ties.
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Jul 19, 2023
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Apr 12, 2023
Sealing tape already loose before using
No 2” option...
Sealing tape already loose before using
No 2” option
by
Verified Purchase
Mar 29, 2023
by
Verified Purchase
Mar 8, 2023
The adhesive does not keep the flap tacked down. Every...
The adhesive does not keep the flap tacked down. Every one I installed , no matter the diameter, the adhesive does not keep the flap down
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Verified Purchase
Feb 17, 2023
This seems to be the best product to use of...
This seems to be the best product to use of you are putting insulation over 1/2' water pipes because it is easy t o install and won't burn easily .
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Verified Purchase
Feb 15, 2023
Pipe insulation need my expectations. Did not have any issues...
Pipe insulation need my expectations. Did not have any issues with the pipe insulation.