Features & Benefits


Benefits of TOSTEM Design

50 Years’ Performance History in Cyclonic Weather at Japan!

TOSTEM is one of the first, large scale manufacturer of aluminum windows in the world. Since the climate at Japan is both cold and cyclonic - highest priority has been given to make windows safe against air and water ingress. Similar to Asia, the dominant style in Japan is Sliding Windows, which is different from Europe where Casement Tilt & Turn is more popular.

Greater Strength, Stronger Corners, Does not Bend or Crack!

The TOSTEM window is very unique as the section thickness is higher in transverse direction to sustain higher wind load. Also, the thickness is higher at points of screw fixing. The aluminum alloy used is 6063 with T5 tempering which is stronger. The corner is joined at 90° and does not require cleats, which are less strong.

Better Air & Water Sealing

Japanese windows are designed for far better performance against air and water which is very important for comfortable living.

Special Protective Coating, Higher Life & Luster!

With the patented TEXGUARD system, the colors of TOSTEM products will last at least 40 years. TEXGUARD is an additional clear synthetic resin paint deposited over the anodized surface which alters the molecular structure of the surface paint and protects the surface against light, heat and water. High scratch resistance and low accumulation of natural dust makes it easy to clean windows with less effort and retain a new-like look for a long time.

Greater Safety With Crescent Lock

Crescent lock is more sturdy and far safer as compared to a push lock. It can only be locked in one position and it is easy to see if the lock is in place. An additional secondary lock prevents the crescent lock from inadvertently getting opened.

Why TOSTEM can be trusted

Ingot to Fabricated Window!

TOSTEM, Thailand is an integrated complex dedicated to the manufacturing of Aluminum windows. Development and Design, Casting, Extrusion, Surface treatment, Coating, Fabrication are all carried out in-house. A second manufacturing complex with similar capabilities is located in Vietnam. Window fabrication units are dispersed across many countries.

TOSTEM, Thailand - Is One of the largest window factories in the world

The facility at Bangkok, Thailand was set up in 1987 and is dedicated to suppling Pre-engineered Windows to Japan and other Asian countries.

Unmatched Production Capacity!

The production capacity is approx. 50,000 windows per day in different SKU’s. The larger share is anodized finish, which is highly preferred by customers. The hardware is in-house and supply chain is very reliable.

Quality Assurance

TOSTEM is committed to develop the best products to meet customers’ requirements. Detailed inspections are carried out during design and testing stages to assess criteria such as basic performance, durability, weather resistance and such. Only designs that pass strict quality control tests are made into products for delivery to customers.