Insulation Innovation Blog

Mineral Wool vs. Fiberglass in Pipe and Tank Wrap

Posted by Brittney Fells on Aug 18, 2017 11:00:00 AM

Pipe and tank insulation is a semi-rigid wrap designed to insulate large piping, round duct and other curved surfaces, such as pipes with tracing lines, most fittings and other irregular shapes. Tank wraps are used extensively in industrial insulation applications to insulate horizontal or vertical tanks, vessels and round ducts. The two primary insulation materials used for pipe and tank wraps are either mineral wool or fiberglass.


A common question asked is, "what is the difference between the two types of insulation wraps?"  GLT Products is here to provide you guidance in selecting the right product.

Mineral Wool:

Mineral wool, also commonly called rock wool is used to insulate extremely hot surfaces, reaching up to 1,000°F. It is composed of volcanic rock primarily, basalt. Mineral wool has low thermal conductivity and fire-resistance, which maximizes control of heat loss, contributing to reduced operating costs and greater energy savings.

It is easy to handle and fabricate. Mineral wool is tough, durable and flexible. The blankets cut cleanly with a knife, making clean up time hassle free.

In addition, mineral wool generates very little waste when being manufactured. It can be recycled and fed straight back into the manufacturing process.


Fiberglass is composed of fine glass fibers, held together with resin and binder. It is used to insulate cold and hot surfaces from -60°F to 650°F. Fiberglass pipe and tank wrap insulation provides good compressive strength while providing flexibility during insulation.

Fiberglass is a cost effective substitute of pre-formed pipe insulation and is a quick and stress-free installation process. The product is intended for indoor use and should be weather protected for use outdoors.

It has a low thermal conductivity compared to similar products, meaning less thickness is required for equivalent heat flow.

Mineral Wool vs. Fiberglass


Mineral Wool



3.3 per inch

3.7 per inch


70% recycled content

20% - 30% recycled content


6 lbs per cubic foot

4  lbs per cubic foot




Moisture Absorption

Will not absorb and retain moisture

Will not absorb and retain moisture





Mineral Wool vs. Fiberglass

Both insulation materials are effective solutions for the insulation of tanks and offer unique advantages and disadvantages. Determining the final selection is often based on cost, temperature range or meeting a certain specification.  

GLT Products has a number of insulation options available, to meet the needs of the industrial insulation market no matter what the application. Our line of pipe and tank insulation wraps allow for the insulation of curved surfaces, such as large pipes, cylindrical vessels, ducts, tanks and other round surfaces. 

Our pipe and tank wrap insulation, eliminates the need for stocking large diameter pipe insulation, thereby eliminating job returns on slow moving items.

To discover more about mineral wool and fiberglass click here.

Topics: Fiberglass, Mineral wool, Pipe and Tank Wrap

Choosing the right fabricated pipe insulation for your mechanical piping application can be a duanting task. Learn the facts in this FREE GUIDE!


Learn the facts, temperature ranges and key applications in this FREE guide. DOWNLOAD HERE.




Subscribe to Email Updates

Request Free Fabric Samples


If you need to examine one of our high temperature fabrics before purchase, request a sample today.
Request a Sample


Contact Us

GLT Products
6810 Cochran Rd
Solon, OH 44139
(800) 874-1748
(440) 914-1122
Fax: (440) 914-1133