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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 both hot and cold service piping from -20°F to 1000°F.  The pipe insulation is molded from heavy density resin bonded glass fibers that come in 3 foot long hinged sections.  The fiberglass is wrapped with white All-Service Jacketing (ASJ) which has a self-sealing lap (SSL) for a quick and secure 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 together.

Typical Uses Include:

  • Domestic Hot & Cold Water Pipes
  • Hot Water Heating Pipes
  • High Temperature Pipes
  • Dual Temperature Pipes
  • Steam Pipes (Low to High Pressure)
  • Condensate Lines
  • Refrigerated / Chilled Liquid Pipes

Choosing The Correct Size:  There are two sizes you need to choose when ordering, the "Pipe Size" and the "Insulation Thickness".  The insulation thickness is the wall thickness of the fiberglass which varies from 1/2" up to 3" thick.  For help selecting an insulation thickness see our Fiberglass Thickness Guide  To determine which Pipe Size to order please see the link below (Note: Pipe Size is NOT the same as the pipe diameter):


Installation Instructions:

To install pipe covering, simply open the hinged part of the pipe insulation and place the opening over the pipe.  The pipe insulation will self close around the pipe.  Once the fiberglass is fitted snug around the pipe, peel the release paper from the self-sealing lap and press the ASJ jacket closed from the middle towards the edges of the pipe insulation.  Make sure to rub the jacket closed to ensure a secure seal.  Seal two sections together with a piece of butt strip tape making sure to rub the tape to create a secure seal.  Additional ASJ MAX Tape is recommended for large projects and projects that require multiple cuts of the insulation.  Use of PVC Fitting Covers for elbows, tees, unions and other pipe fittings should be installed after installing fiberglass pipe insulation. 

For more information: Fiberglass Pipe Insulation Datasheet


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.



 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.



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 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

Previous | Showing reviews 11-20 of 75 | Next

  1. Excellent pipe insulation

    Posted by John V. on 30th Jan 2018

    My second order. Owens Corning insulation is an excellent product. Doesn't let heat escape, fiberglass doesn't fall apart, extremely easy to install and cover can be wiped clean. Gives a neat appearance. I couldn't find anything comparable in stores. Prices on Buy Insulation Products were very good, web site was easy to use and helpful and shipping was quick. I couldn't ask for more.

  2. Pipe insulation

    Posted by Unknown on 28th Jan 2018

    Thicker than the product at the big box stores and at a better price. Very easy to install. Used a serrated knife to make any cuts. Made a big change in the amount of heat to the radiators. Buy extra tape for any unusual cuts. Duct tape will not last.

  3. Easy to install

    Posted by Christine H. on 25th Jan 2018

    The pipe insulation was real easy to install. I was able to do most of my basement in about 3 hours. I found additional pipes that were hidden that need to be insulated and I will be purchasing from Buy Insulation Products again.


    Posted by RJB on 25th Jan 2018

    Easy install! An advanced adhesive system at the seam makes it a great product. Believe me, I searched the web for a long time to find the best price. Thanks, I am going to save oil money for decades.

    *RJB, pipe insulation saving you money is guaranteed! Enjoy the savings! ~ BIP

  5. Excellent pipe insulation

    Posted by Robert Y. on 23rd Jan 2018

    Easy to cut and apply. Follow the video directions.

  6. Just right for the job

    Posted by Towers on 22nd Jan 2018

    Great product, easy to install. Shipment arrived in just a few days. I would definitely do business with this company again.

  7. Quality product - easy installation!

    Posted by Carolanne C. on 22nd Jan 2018

    I wanted to re-insulate the steam pipes coming from my basement boiler after having asbestos insulation removed.. After comparing what was offered from the Big Box stores (1/2” thickness), I realized I could get double the insulation value (1”) from BuyInsulationProducts.com for less money! The product arrived promptly (the next day after ordering!). I was able to apply about 90 feet of insulation in a couple of hours, including cutting and fitting around joints. The fiberglass tubes cut easily with a serrated kitchen knife and the self stick seal was incredibly easy and secure.

    I can tell the insulation is doing its job; the basement is much cooler and the radiators are much hotter than before.

    I am extremely satisfied with the quality of the insulation and the ease of installation. I have already recommended this company to my neighbor who is also in need of replacement insulation. I would recommend BuyInsulationProducts.com to anyone for their insulation needs.

    *Carolanne, thank you for such a great review! A big drop in basement temperature is a great sign that the pipe insulation is working as planned! ~ BIP

  8. So simple to install. Very high quality.

    Posted by Philip R. on 18th Jan 2018

    Simple to install, and helps tremendously. Shipping was really fast and packaged perfectly.

  9. Great pipe insulation

    Posted by GM on 17th Jan 2018

    Bought this product because it's made by Owns Corning and was not disappointed. Easy to use and looks nice.

  10. Everything Was Perfect

    Posted by John V on 17th Jan 2018

    I ordered insulation for heat pipes in the house. Great selection. Determining the correct sizes was very easy. The charts and the instructions were simple and clear. I had contacted Buy Insulation Products by email with a question and Jon's response was quick and helpful. The fiberglass insulation, made by Owens Corning, fit perfectly, and its adhesive sealing performed as well. Though shipping added a bit to the cost, I was very happy with the price of the insulation. In sum: great product, great service.

    *John we are happy to hear that everything worked out great for your insulation project ~ BIP

Previous | Showing reviews 11-20 of 75 | Next

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