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Fiberglass Pipe Insulation

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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


 Product Reviews

Showing reviews 1-10 of 18 | Next

  1. 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

  2. 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.

  3. 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.

  4. 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

  5. Excellent Service.

    Posted by Matthew G on 22nd Dec 2015

    My steam pipe insulation arrived within days in a sturdy box. I was very pleased at the value.

  6. Easy to install , Do it Yourself.

    Posted by Unknown on 14th Dec 2015

    I have an old single pipe steam heating system. I had the asbestos insulation professionally removed and wanted to save some money by re-insulating the pipes myself. This product is easy to install and produces professional looking results.

  7. Lap Tape Adhesive

    Posted by Andy K on 3rd Dec 2015

    The product preforms as expected and was shipped to us with great regard to ensure no damage was done. Many times boxes are damaged and ends of insulation are destroyed, not the case with this company! The adhesive on the lap tape joints is less than stellar however. After installation many of the sections opened up again and some areas required additional adhesive or re taping with another product to keep sealed. Overall a good product.

    *Andy, we passed along your complaints about the laps opening to Owens Corning as this is not common with their products ~ BIP

  8. bottom line- buy this product here

    Posted by Unknown on 14th Nov 2015

    Don't bother going to big box brick and mortar home stores. This product is higher quality and lower in cost. Order today and have it within a day or two. Easy.

    **Thanks for the referral! ~ BIP

  9. Excellent Service & Product

    Posted by JoAnna on 27th Oct 2015

    I really appreciated all the help from the people here. With their help, I was able to order the right insulation, it arrived super quick and was a perfect fit. The prices are very reasonable and the service was perfect. Don't be afraid to ask them any questions, they will help you.

  10. Great website, great product

    Posted by Unknown on 26th Oct 2015

    The size chart was super helpful. I've never bought insulation before, and after searching Amazon and popular hardware stores I just couldn't find exactly what I needed.

    This was it! I ordered it one day, and the next it was at my door. Incredible!

Showing reviews 1-10 of 18 | Next


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