tostem
quality

Established in 1923, TOSTEM is renowned for aluminum sash windows, entrance doors and other building materials. Designed to be stylish and functional, TOSTEM products are developed to also withstand the toughest weather conditions.

quality
performance
test center

We test all our products with rigour at the quality performance testing center including wind pressure resistance, air tightness and water tightness, durability and strength, sound proofing, thermal insulation, light exposure, environmental and surface treatment tests.

TEXGUARD

A Surface color treatment with advanced Japanese technology

TEXGUARD delivers a non-gloss and clearer finish, combining anodic and organic coatings. They provide an effective surface treatment that applies synthetic resin paint which is then banked over an anodic oxide coating.

TOSTEM’s surface treatments are available in a wide range of color tones, from light to dark in the bronze color spectrum, and Natural White, Ivory White and Autumn Brown through the use of pigments. The final surface color retains its tone, resulting in a long lasting, pleasing appearance.

DURABLE BEAUTY

Durable beauty with our patented TEXGUARD system, the colors of TOSTEM products will last at least 40 years, with excellent scratch resistance for a new look that doesn’t fade. Additionally, natural dust and dirt accumulation-resistance keeps TOSTEM products looking clean with less effort.

PRE-ENGINEERED PRODUCTS

Unlike other manufacturers, TOSTEM can provide products in both pre-engineered formats for assembly as well as finished goods formats.

pull

roller

lockset

AIRTIGHT PIECE

drain

bottom guide

DESIGNING & ENGINEERING INTO EVERY DETAIL

TOSTEM’s uncompromising emphasis on quality, which is synonymous with Japanese-borne engineering, pushes us to continuously perfect our window system. Building on the technology and quality that we have nurtured over the last 50 years, at TOSTEM, we strive to design products that are not only functional but create every-day comfort at home.

At TOSTEM, we are committed to understanding local climates and environments, and pursuing technology innovations to provide customers with a full lineup of products that suit the region in which they live.

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.

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.

JAPANESE ENGINEERING & TOSTEM QUALITY DETAIL

All products of TOSTEM are developed and designed, manufactured and assembled under integrated production process with strict TOSTEM quality control. Extrusion dies, aluminium bullet, extrusion profiles, coating, pre-fabrication, and hardware assembly process are all done in TOSTEM factory in Thailand.

The greatest benefit of TOSTEM pre-engineered system is the ability to build windows in consistent quality. With a single screw driver, anyone can build a same quality window system reiteratively. We strive to achieve constant excellence on all the production cycle, as well as our system.

TRADITIONAL BATCH VS. TOSTEM MASS MANUFACTURING

The TOSTEM method of manufacturing uses dedicated machines (punch & die set) for every operation. Process control is better and output rates are much higher. It is also easier to exercise quality control as there is a dedicated cell for each design of window.

HIGH PRECISION PROCESS

The punch system of manufacturing followed by TOSTEM is very accurate. Anodizing finish is preferred as it has a uniform thickness of 20 microns. Powder coating is also used, but is more difficult in production, as thickness usually varies between 60-120 microns.

LIFE CYCLE TESTING IN ACCREDITED TEST LAB!

The test lab at Japan is accredited by the Japanese Government. The factory at Thailand has the largest testing facility for wind pressure, air tightness, water tightness, material composition and strength, sound isolation, thermal insulation, light and UV resistance, profile and anodizing life test against both JIS and ASTM Standards. Rollers are tested for 200,000 operations.

EASE OF OPERATION

Windows are intended to be opened and closed many times in a day. A key aspect of design is that effort should be minimal so that even a child can safely open the window. For instance, the effort required to open or close a 2-track / 4-panel WE Plus Door of 4200 mm width and 2400 mm height with single glass is under 50 N (5 Kgs).

EASE OF STORAGE & TRANSPORTATION

The sash and frame are packed in separate boxes. Gaskets are supplied in roll form. The entire bundle is very compact which reduces transportation cost, storage and transit damages. Lead and lift requirements are much simplified.

SUSTAINABLE MATERIALS & FIRE SAFETY

Aluminum is 100% recyclable and has higher resale value as compared to other window materials. It is also environment friendly, fire safe and does not release toxic fumes in event of fire.

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