![](jpg/hdr-stainguard-plus-1m752a.jpg)
Advanced Algae Protection
25 & 30-year limited warranties against blue-green algae discoloration available on qualifying GAF products1
Educational sample available for professionals
Get a sample to help illustrate how GAF Time-Release Algae-Fighting Technology works and the products that are eligible for a 25-year StainGuard Plus™ or 30-year StainGuard Plus™ Pro Algae Protection Limited Warranties.1![GAF StainGuard Time-Release Algae-Fighting technology sample available for roofing professionals.](png/preview_algae-fighter-powerceb2.png)
![Blue house with gray shingles, showing algae stains on roof.](jpg/feature_what-is-algae-12f4f.jpg)
What is blue-green algae?
![Gray roof shingles with blue-green algae stains.](jpg/feature_algae-causes-12f78.jpg)
What causes roof algae to grow?
Get the tech no one else has with GAF Time-Release Algae-Fighting Technology
Proprietary to GAF, our Time-Release Algae-Fighting Technology is engineered with thousands of copper microsites that release algae-fighting copper efficiently, over time, for long-lasting algae-fighting power.![GAF algae resistant shingle roof with close-up of proprietary algae-fighting technology](jpg/feature_time-release-tech-242b1.jpg)
Get protection you can see on our best-selling shingles - Timberline HDZ® and Timberline® UHDZ™
Add algae protection from eave to ridge
Customers can now get the benefits of GAF Time-Release Algae-Fighting Technology and the strong algae protection limited warranties on qualifying shingles, ridge caps, and even visible starter strips.
Additional GAF products with Time-Release Algae-Fighting Technology and a 25-year StainGuard Plus™ Algae Protection Limited Warranty2:
![Package of GAF TimberTex premium ridge cap shingles.](png/aboutus_timbertex-packaging93ff.png)
TimberTex®
SEE PRODUCT
![](png/aboutus_timbercrest-packaging4765.png)
TimberCrest®
SEE PRODUCT
![Package of GAF Ridglass premium ridge cap shingles, offering blue-green algae protection.](png/aboutus_ridglass-packagingbfc8.png)
Ridglass®
SEE PRODUCT
![Package of GAF Seal‑A‑Ridge ridge cap roof shingles, offering the StainGuard Plus limited warranty.](png/aboutus_sealaridge-packaging77cf.png)
Seal-A-Ridge®
SEE PRODUCT
![Package of GAF Z Ridge distinctive ridge cap shingles with blue-green algae resistance.](png/aboutus_zridge-packaging30eb.png)
Z® Ridge
SEE PRODUCT
![Package of GAF Seal‑A‑Ridge® AS SBS‑Modified IR ridge cap shingles.](png/aboutus_sealaridge-as-packaginga1a3.png)
Seal-A-Ridge® AS
SEE PRODUCT
![](png/aboutus_timberline-asii-packaging7d1c.png)
Timberline® AS II
SEE PRODUCT
![](png/aboutus_timberline-cs-packaging193b.png)
Timberline® CS
SEE PRODUCT
![Package of Grand Canyon roof shingles by GAF.](png/aboutus_grand-canyon-packagingc3e1.png)
Grand Canyon® Shingles
SEE PRODUCT
![Package of GAF Grand Sequoia designer roof shingles with blue-green algae resistance.](png/aboutus_grand-sequoia-packagingf9f4.png)
Grand Sequoia® Shingles
SEE PRODUCT
![Package of Grand Sequoia AS roof shingles by GAF.](png/aboutus_grand-sequoia-as-packagingd0d3.png)
Grand Sequoia® AS Shingles
SEE PRODUCT
![Package of Camelot II shingles by GAF, offering the StainGuard Plus 25-year limited warranty.](png/aboutus_camelot-ii-packaging925e.png)
Camelot® II Shingles
SEE PRODUCT
![Package of Slateline designer roof shingles by GAF.](png/aboutus_slateline-packaginge222.png)
Slateline® Shingles
SEE PRODUCT
![](png/aboutus_woodland-packagingd419.png)
Woodland® Shingles
SEE PRODUCT
![](jpg/aboutus_startermatch-packaging-21466.jpg)
StarterMatch®
SEE PRODUCT
Pros, complete the playlist to learn about GAF Time-Release Algae-Fighting Technology and how it helps protect a homes curb appeal