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NORA Issues Product Specifications for Vacuum Tower Asphalt Extender (VTAE)

Wednesday, April 22, 2015   (0 Comments)
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NORA Issues Product Specifications for Vacuum Tower Asphalt Extender (VTAE)

Gainesville, Virginia (April 22, 2015) - NORA, An Association of Responsible Recyclers (formerly the National Oil Recyclers Association) issued final specifications for two products that are used in the formulation of asphalt paving and asphalt roofing materials. 

According to Scott Parker, NORA’s Executive Director, the specifications were issued in order to ensure that “basic standards of quality are routinely achieved.” The products are derived from used oil distillation processes using vacuum tower technologies. 

Parker emphasized that the vacuum tower asphalt extenders “have been successfully used for more than three decades for both asphalt paving and asphalt roofing materials.” The VTAE products provide “essential components to asphalt products including moisture resistance and viscosity,” Parker stated.

NORA’s VTAE specifications require VTAE manufacturers to apply four different ASTM test methods including test methods for flash and fire points, solubility, and viscosity. While in draft form, NORA invited public and private sector comments on the proposed VTAE specifications. 

“We believe that the VTAE specifications issued constitute a widespread consensus throughout the asphalt industry that the specifications are workable and appropriate,” Parker said.

Parker also pointed out that while NORA’s VTAE specifications represent the industry standard for quality, NORA will undertake an effort to secure adoption of the NORA specifications (or similar specifications) by ASTM. 

“It is well known that the ASTM product specification process is a very lengthy project and we believed it was important for NORA to make these consensus specifications available for 2015 and the foreseeable future,” Parker stated.

NORA’s VTAE asphalt paving and roofing materials are available here


About VTAE

VTAE is derived from used oil distillation. According to the producers of VTAE, the product provides the critical element of flexibility to “hard asphalt” and enhances the performance of ordinary asphalt with adhesive strength, joint sealing and other qualities such as water proofing. VTAE, which has been referred in the past to asphalt flux, asphalt extender, vacuum tower bottoms and other names, has been successfully used as an ingredient in asphalt pavement and roofing since at least 1983. In 2014, certain states issued bans related to the use of VTAE in asphalt pavement because of concerns of negative impacts from the use of the product. NORA has taken a leadership role in bringing various sectors (NORA members as well as non-members) from the industry together to develop the VTAE specifications. In addition, research is currently underway that will address the concerns of the states that have banned these materials.


About NORA

NORA, An Association of Responsible Recyclers represents over 390 leading companies involved in the responsible recycling of used oil and related materials that would otherwise negatively impact the environment. NORA members work every day to ensure that more than a billion gallons per year of used oil and related materials are collected, recycled and given another useful life. NORA has been defending and promoting the industry since 1985. For more information on NORA, visit

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