The science, in homeowner language
Here is what changes as shingles age, what published testing found, and how to read those results without turning them into promises they cannot support.
Start with the material
The asphalt in a shingle contains oils that help the material remain flexible. Sun, heat, oxygen, and weather gradually change that balance.
As those oils diminish, the shingle can become drier and more rigid. It may release more surface granules and respond less readily to movement or cold. The product uses a natural, corn-based oil with 95% USDA Certified Biobased Content to help replenish oils in serviceable shingles; it cannot rebuild a failed roof.
Published comparison testing
Each result below compares treated and untreated aged shingles. The larger number is only half the story, so we have translated it into what it may mean for the material on a roof.
Roof Rejuvenate USA, working with Sika, commissioned independent laboratory PRI Asphalt Technologies to compare treated and untreated shingles taken from an approximately 15-year-old roof. PRI then put the samples through 1,500 hours of accelerated weathering designed to simulate about five years of natural aging.
These are results reported in published laboratory testing on approximately 15-year-old asphalt shingles, not a guarantee that an individual roof will achieve identical results or exactly five additional years. Tested products may not necessarily be the exact formulation currently used or available through every dealer.
In this laboratory comparison, treated shingles shed about half as much granule mass. For your roof, retaining more of that protective surface may help keep the asphalt below better shielded from sun and weather.
Independent testing by PRI Asphalt TechnologiesThe treated samples bent more readily in cold testing. For your shingles, that points to less brittle material behavior—the opposite of the dry, rigid condition that makes older shingles easier to crack.
Independent testing by PRI Asphalt TechnologiesAfter completing the full controlled aging cycle, the treated shingles still showed measurable improvements in granule retention and cold flexibility. That gives homeowners useful evidence that the benefits lasted well beyond the day of application.
Independent testing by PRI Asphalt TechnologiesProduct pedigree matters
After looking at the published results, it is reasonable to ask who stands behind the chemistry. The formula’s construction-materials lineage is an important part of the decision.
Roof Rejuvenate's formula was engineered by Colorbiotics, a Sika company.
Construction-materials lineage
Sika is a global specialty-chemicals company with more than a century of experience developing systems that bond, seal, reinforce, repair, and protect buildings and infrastructure.
Evidence, not a diagnosis
Laboratory comparisons cannot tell us whether your flashing leaks, whether decking is sound, or how your particular roof will respond. They do not create a new wind, hail, or impact rating, and they do not guarantee an exact number of added years.
That is why an on-roof assessment still comes before a recommendation.
Environmental profile
These statements describe the product’s published composition and positioning. They do not change the need for correct preparation, application, and runoff protection.
Protection in writing
A warranty is useful when the roof qualifies, the work is documented, and the service is properly registered.
A five-year transferable product warranty is available, subject to the current written terms, roof qualification, approved preparation and application, documentation, and registration.
At the end of that cycle, a roof that remains serviceable and qualifies again may be treated again—helping a homeowner preserve usable shingles and delay replacement longer.
The current written warranty controls the actual coverage, exclusions, transfer requirements, and claims process.
