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The Perfect Mix: Creating Durable Asphalt Shingles

When it comes to asphalt roofing shingles, not every product is created equal. Superior asphalt shingles require the perfect combination of ingredients and process. Malarkey shingles with Flexor™ SBS polymer modified asphalt are designed to provide the durability that every roof deserves.

Making shingles is like baking a cookie, the right ingredients blended with the right process creates a premium product.


Much like baking a cookie, making asphalt shingles requires the right ingredients and the right process to create a premium product. Asphalt shingles are primarily built of four components: fiberglass mat, asphalt, filler, and granules. Each of these components serves a function and is critical to the success of the final product.

Flux is the base for all roofing asphalts, also known as weathering grade asphalts.


Asphalt in its raw form is referred to as flux. Asphalt is naturally aged by heat, oxygen, and UV rays, which cause it to become less flexible and more brittle.


Flux has a softening point between 80ºF and 120ºF. Normal roof temperatures can exceed 180ºF, which means the softening point for flux must be raised.

How can the softening point be raised? Oxidation VS. Polymer Modification.


Traditionally, manufacturers artificially expedite the aging process to stiffen the asphalt and raise the softening point. This is done through a process called oxidation that bubbles air through liquid asphalt flux at very high temperatures for many hours.

An alternative method is to modify the flux asphalt with polymers. In this process, flux is blended with polymers through lower temperatures and a shorter time period. Polymer modification allows manufacturers to engineer the shingles to be more flexible and durable, creating shingles able to function under greater strains caused by high winds or the impact of a hailstone.


Much like baking a cookie, making asphalt shingles requires the right ingredients and the right process to create a premium product.

Oxidation is like a standard cookie. In this process, the fiberglass mat is coated with oxidized asphalt. While oxidation creates asphalt that can be used on a roof, the process reduces flexibility and durability.

Some manufacturers coat the fiberglass mat with oxidized asphalt then add a layer of modified asphalt on top, similar to a standard cookie with icing. While on the surface this method appears to offer some of the benefits of modified asphalt, the base of the product still retains the reduced flexibility and durability of oxidized asphalt.

Shingles with Flexor™ SBS polymer modified asphalt from Malarkey are like the perfect cookie. The fiberglass mat is coated with Flexor™ asphalt, which is created with a unique blend of polymers that have been fully incorporated into the asphalt. The result is a shingle better able to withstand the temperatures seen on rooftops while maintaining flexibility and providing additional resistance to strain.