Don’t Replace, REJUVENATE!
Test and Evaluation Report | Greener Shingles
Screening Evaluation of Shingle Rejuvenator by PRI, August 15,2018. PRI is in no Way affiliated with Greener Shingles Rejuvenator outside of this initial independant lab test 2022 continued weather testing.
Test and Evaluation Report
Screening Evaluation of Shingle Rejuvenator
PRI is a national and global leader in materials testing and performance. PRI provides accredited, independent, third-party testing, evaluation, and technical services to the Asphalt/Bitumen, Building Materials, Chemical, Construction/Infrastructure, and Energy Markets.
Background: Rejuvenators have a long history of limited use in the asphalt roofing industry. Initial use was limited to conventional hot-mopped built-up roofs. Over the years, there have been attempts to restore/maintain rejuvenated asphalt shingle roofs.
In the most recent times, asphalt rejuvenation has gained national focus in the paving industry. In response to the enhanced focus, a number of new technologies have been introduced. Some of these products are advancing the rejuvenation/restoration technologies and are hypothesized to exhibit efficacy in the asphalt roofing industry.
Perform and assess selected screening evaluation to provide insight on Greener Shingles Roof Shingle Treatment System.
Based on a Spray Application Rate of 1 gal/125 ft.2, followed by a five (5) day ‘cure’ period on aged shingles provided.
These screening evaluations strongly suggest the Greener Shingles Roof Treatment provides benefits to key performance properties of asphalt shingles associated with durability and possible extended life cycles.
Flexibility, 23°C was improved (Failure to pass).
Granular Adhesion was improved significantly from a granular loss of 1.11 g to a loss after treatment of 0.15 g, an 86% improvement.
Hail Impact was slightly improved after treatment. The improvement, 6.6%, was minimized by the type of shingle evaluated – organic felt based. The data suggests hail impact would have a greater improvement on FG mat-based shingles.
Fire Resistance ‘UL Speed of Flame:’ The treated shingles exhibited a flame spread of 86 in 2 vs. the untreated shingles exhibiting a 144 in2 spread. Greener Shingles rejuvenator proved 40% better flame resistance vs untreated shingles, this was unexpected.
Additional Conclusions From Primary Property Assessment
Mass loss in asphalt shingles is due to both the oxidative aging of the binder andgranular loss during the accelerated weathering process.
After 1,500 hours of exposure the mass loss of the un-treated shingles was 5.4%compared to 0.5% for the Greener Shingles’ rejuvenator.
Greener Shingles Rejuvenator performs 10.8 times better than un-treated shingles.
Wash off Material:
The exposure cycles consistently contained particulate material and shingle granules that were washed off by the accelerated weathering process.
After 1,500 hours of exposure the mass of the collected particulate from the un-treatedshingles was 4.08g compared to 0.70g for the Greener Shingles’ rejuvenator.
Greener Shingles Rejuvenator performs 5.8 times better than un-treated shingles.
Oxidative Aging (Measured by Carbonyl Indices):
Oxidative aging in asphalt-based products can be quantified by a peak in a specific position on an FT-IR spectrum.
After 1,500 hours of exposure the un-treated shingles exhibited a 30.7% increase in
carbonyl index, compared to Greener Shingle’s 7.8% increase.
Greener Shingles Rejuvenator performs 3.9 times better than un-treated shingles.
After 1,500 hours of exposure, Greener Shingles Rejuvenator improved low temperature flexibility from -22°F to -31°F.
Shingle Color and Appearance:
After 1,500 hours of exposure, the shingles treated with Greener Shingles Rejuvenator exhibit a significantly different appearance than those left untreated.
Un-treated shingles show a clear increase in the roofing granules lost. (Appendix A-4)