The vast majority of Mastic products are covered by an exclusive V.I.P Limited Lifetime Warranty. This means your products are covered for as long as you live in and own your home, and if you sell your home, the warranty is transferable and the new owners are covered for 50 years from the date of original installation. See the specific terms of our warranty below.

Warranty Support
If you discover a defect and are still within your warranty period, simply notify Ply Gem directly within 30 days at 1-800-962-3563 and a friendly support professional will walk you through the rest.