Residential Glass - Mastic Options

Inner-lok Double Hung Features:
Mastic Inner-lok windows were designed with the homeowner in mind, as well as standing up to nature’s ways. Both sashes tilt for easy cleaning, and are completely removable from the inside. Sashes are reinforced with nylon corner keys to maintain their structural strength.

Tru-lok Double Hung Features:
Mastic Tru-lok windows are built to perform – and built to last. With removable, tilt-in sashes, easy cleaning convenience is yours. Its unique design makes the Tru-lok window an exceptionally affordable choice in a fully welded window.

Trim-lok Double Hung Features:
Mastic Trim-Lok windows have proven their performance. Both sashes tilt for easy cleaning, and are completely removable from the inside if maintenance is needed. Sashes are welded for additional strength.

Vinyl Garden Window:
"Enjoy The Beauty of A Mini Greenhouse"

The Mastic Vinyl Garden Window is specially designed to combine the aesthetic appeal of clean lines with a refined structural design that assures lasting durability. Glass area is also maximized with this unique design. Frame and casements are aligned inside, for a "straight through" view to the outside. The end casements are easily opened for ventilation, and full screens are standard. Locks and operators are within easy reach, even when installed behind a kitchen counter.