10/05/2026
At TOSTEM, we are dedicated to creating window and door frames that stand the test of time, even in todayβs increasingly demanding conditions.
Our products undergo rigorous solar simulation test, with extended exposure to UV and infrared rays, as well as structural strength and durability tests with up to 100,000 continuous forceful open-and-close cycles.
These measures ensure that their beauty and quality will endure for decades, even as environmental challenges evolve.