Oil depletion
An asphalt shingle is a fibreglass mat saturated with asphalt and surfaced with ceramic granules. The asphalt is held pliable by lightweight oils, or maltenes. Heat, oxygen and ultraviolet radiation drive those oils out of the mat over time. As they leave, the remaining asphalt hardens, the mat contracts, and the bond holding granules in place weakens. Curling, cracking and granule shedding are the visible end of a chemical process that started years earlier.
Oxidation misread as “age”
A traditional roofer looks at a dry, faded, granule-thin roof and calls it worn out. In most cases what they are seeing is oxidation, not structural failure. The mat is intact; the chemistry is depleted. That distinction is the whole argument for rejuvenation, and it is why a roof can look finished and still be a candidate for treatment.
GreenSoy™ chemistry — penetrating, not coating
A coating sits on top of a shingle and forms a film. GreenSoy™ does the opposite: it is a soy-derived, USDA certified bio-based oil with a molecular profile close to the maltenes the shingle has lost, so it absorbs into the mat and rejoins the asphalt matrix. The shingle regains flexibility from the inside rather than gaining a layer on the outside — which matters in Colorado, where a surface film would face constant freeze-thaw stress.
Independent PRI laboratory testing
Independent testing at PRI Construction Materials Technologies measured treated shingles against untreated controls:
| Result | Measure |
|---|---|
| 50% | Improved flexibility |
| 85% | Increased durability |
| 68% | Better fire resistance |
| 7% | Granule loss in hail testing |
| 20% / 50% | More color restored / longer color retention |
Source: PRI Construction Materials Technologies laboratory testing of GreenSoy™ treated asphalt shingles. Results reflect controlled testing; performance on any individual roof depends on shingle condition and is confirmed at inspection.
The landfill problem
Roughly 11 million tons of asphalt shingles reach American landfills every year. A tear-off on a single Denver home puts several tons of material into that stream. Rejuvenation adds years to a roof that already exists, with no tear-off and effectively zero waste — which for many homeowners is the second-best reason to do it, after the cost.