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Fiberglass Pipe Insulation

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  • Owens Corning ASJ Max Fiberglass Pipe Insulation is Made in the USA
  • Owens Corning ASJ Max Fiberglass Pipe Insulation Benefits
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  • Iron Sizing Chart for Pipe Insulation
  • Copper Sizing Chart for Pipe Insulation
Owens Corning / Johns Manville
Unit Of Measure:
Per 3ft Section

 Product Description

Fiberglass Pipe Insulation covering is intended as a thermal insulation for hot and cold service piping from -20°F to 1000°F. Typical uses include: domestic hot and cold water, hot water heating, high temperature, dual temperature, steam, condensate, and refrigerated lines. Fiberglass pipe covering has a white all service jacketing (ASJ) and comes with a self-sealing lap (SSL) for a quick and easy installation.  Each 3 foot section of pipe insulation comes with a butt strip tape (matching the white ASJ jacketing) that is used to connect two sections of pipe insulation togther.  Ordering an extra roll of ASJ tape is recommended for larger projects or projects requiring cuts to fit around elbows, tees, and other fittings.  Use of PVC fitting covers is also highly recommended in conjunction with Fiberglass Pipe Insulation.  White mastic is commonly applied to seal any exposed fiberglass.

White ASJ Jacketing: A large majority of the pipe insulation we ship is the new Owens Corning ASJ Max pipe insulation while some larger sizes and (3 x 1/2, 3-1/8 x 1/2, 4 x 1/2, and 4-1/8 x 1/2) will be Johns Manville Micro-Loc HP.  The new ASJ Max jacketing has a poly top-coat over the ASJ paper which makes it easier to wipe clean and slightly water resistant (cannot be left exposed outdoors).

NOTE: Each unit is 3 linear feet of pipe covering. For example, if you need 9 linear feet, you only need to order 3 units.

NOTE: All Fiberglass Pipe Insulation sizes listed on our site are "pipe sizes" not the diameter measurement. See chart above for sizing instructions.


If you are not 100% sure on what size to order, it is highly recommended to first purchase a Pipe Caliper and use it to accurately measure and then order the correct fiberglass pipe insulation.  Do not hesitate to contact us if you have any questions regarding which size to order.

Fiberglass Pipe Insulation Datasheet




 insulator-kit-small.pngGet a FREE Professional Insulator Kit
with any purchase of over 150 ft of Fiberglass Pipe Insulation


TIP: We highly recommend ordering a roll of ASJ Max Tape with your order of Fiberglass Pipe Insulation
to ensure you have enough tape to completely seal your piping system.  Every cut made between
fittings (tees / 90s etc) will result in the need for more tape. ASJ Max Tape also comes in
25'er Short Rolls for smaller projects.

 Product Videos

Fiberglass Pipe Insulation Installation Instructions
  • Fiberglass Pipe Insulation Installation Instructions
    This is a basic tutorial that covers how to measure your pipe ...

 Product Reviews

Showing reviews 1-10 of 24 | Next

  1. Excellent Product

    Posted by Jeff on 18th Oct 2016

    Great product. Shipping is FAST. Ordered on a Sunday night receive my package on a Tuesday. Product itself is near perfection. I have used product at other stores with little success and satisfaction. That is not the case here. Only complaint is that I didn't get my free Insulator Kit with my purchase of over $150.00

    *Jeff, thank you for the review. The insulator kit promo is currently given to orders of 150ft or more of pipe insulation, not $150 or more. Sorry for the confusion ~ BIP

  2. They don't disappoint

    Posted by Karen M. on 28th Sep 2016

    We always get our product correctly and fast! Thank you so much!

    **Karen, thank you for all of your business, we greatly appreciate it! ~ BIP

  3. Quality Product

    Posted by Lisa M on 20th Mar 2016

    I have bought pipe wrap from big box stores , as a contractor I can tell your products are built better, with better selection in pipe size , the adhesive to seal the wrap is better and does not come undone like other wraps. I like the fact you included extra tape to seal the wrap. I use it on steam systems

    *Lisa, we are glad that you are happy with the quality of the product, let us know if you need anything else. ~BIP

  4. Great product and service

    Posted by Norm on 16th Mar 2016

    I had asbestos removed from my steam pipes. I called this company about fiberglass replacement and a real person answered the phone and gave helpful information. I found it easy to cut to size with a kitchen knife and easy to install.

    *Norm, I am glad you had a good shopping experience with us, thank you again for your compliments ~ BIP

  5. Piece of Cake!

    Posted by David D. on 16th Feb 2016

    I had read that I should insulate my steam pipes in our new house and was expecting a big project to get it done. This product made it a cinch! Just measured my pipes ahead of time so I knew what to order. The pieces are super easy to install... Individual 3' sections are easy to work with, slide them into place, peal the adhesive strip and seal. Done. Was done in a couple hours.

    **David, we are glad that the insulation project went smoothly for you ~ BIP

  6. Great steam pipe product

    Posted by Unknown on 16th Feb 2016

    This item was shipped extremely quickly and is a GREAT product.! We recently had asbestos removed from our steam pipes and used this product to insulate our 2" iron pipes. This was VERY easy to install; the tape held it tight to the pipes. I had to cut smaller pieces and the paper wrapping even held with no issues so far. Tape to "connect" pieces together was included at no extra price. It is NOT itchy at all, even after cutting to trim, and was very easy to trim. We bought the 1" thick insulation and I feel the price is a great value for the Owens-Corning brand.

    ** We are pleased that your insulation project went well! ~ BIP

  7. Better than big box!!

    Posted by Steve on 22nd Jan 2016

    Don't bother with the local big name stores. Shipping is so fast, cheap and convenient, that ordering on line is a no brainer. The product surpasses my comparison of locally available insulation supplies.
    Overall a great source for DIY's.

    **Steve, thank you for the referral. The big box stores are good on most items, just not on pipe insulation. ~ BIP

  8. Easy to install and effective

    Posted by Peter on 12th Jan 2016

    I replaced some old asbestos insulation with the fiberglass and found that the existing fiberglass on some of the pipes was thinner than recommended, so did that as well.
    Installation was very easy and the results are very professional in appearance. Would recommend to anyone wishing to upgrade their insulation. Simply peel the cover from the adhesive edge and wrap it tight.
    Delivery was very fast.

  9. don't hesitate, order here

    Posted by bill on 1st Jan 2016

    great products and great service.
    they also include joint tape with each section
    I ordered on Sunday night, it shipped on Tuesday and I had it on Wednesday.

    I tried the local H.Depot version and it was a waist of $ (thinner fiberglass, cheaper paper, sealing tape didn't stick, no joint tape.
    take a few moments to order here.

  10. Fiberglass Pipe Insulation on Steam Pipes

    Posted by Rick on 22nd Dec 2015

    User interface with website is excellent, it provides smooth navigation to select the pipe size and insulation thickness. The site is very informative with illustrations and tables to ensure the PVC fitting covers match the pipe and insulation thickness. Customer service is a call away and they handled my call immediately. I received the materials in couple of days after the order. Once you get the material you will easily install the straight runs. The fittings are a little more challenging for a DIYer. The final results look great. As others have said, don't bother going to Big Box.

    *Rick, thank you for the compliments! ~ BIP

Showing reviews 1-10 of 24 | Next

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