Why is waterproofing necessary?

Is waterproofing really necessary? A detailed explanation of how waterproofing works!

last updated May 29, 2025

What types of waterproofing are there?

Speed up! Cost down! Two processes reduced to one.

last updated May 29, 2025

Features of Asphalt Waterproofing Work

Hybrid modified asphalt sheet that combines the advantages of the torch method and the self-adhesive method.

last updated May 29, 2025

Features of OS-sheets

The conventional layering process has been shortened to one step! Sandwich structure of modified asphalt layer.

last updated May 29, 2025

OS-sheets: Customer Feedback

Here are some comments from our customers who manage apartments!

last updated May 29, 2025

【Labor Shortage Resolution】10-Year Warranty (with Extension) Modified Asphalt Waterproof Sheet

Since only the joints of the waterproof sheet are melted for joining, anyone can easily install it! Using a small burner, there is no need for gas refilling. *Shortens construction time and reduces costs.

last updated May 29, 2025

Balancing power and portability! Can-type gas cartridge "OS Hand Burner"

【Continuous burning time approximately 60 minutes】Can-type gas cylinder, no need for gas refilling! Also serves as an alternative to LP gas (propane) cylinders. *Exhibited at the Waterproof Technology Exhibition.

last updated May 29, 2025

Waterproof construction method "OS-sheets Waterproof System" to improve productivity.

Realizing labor-saving and productivity improvement in construction! An environmentally friendly waterproofing construction system.

last updated May 29, 2025

OS-sheets Ventilation System with Continuous Air Release Path from the Ventilation Layer

Achieving labor-saving and productivity improvement in construction! Environmentally friendly waterproofing construction system *Patent obtained! Patent No. 7001280

last updated May 29, 2025

Introducing the powerful fire output OS hand burner Magnum!

Compact yet delivers 17,000 kcl/h of high power. Compatible with both propane gas and gas cartridges, featuring a one-touch ignition function.

last updated May 29, 2025

No qualifications needed! Anyone can easily perform waterproofing work with the 'Waterproofing System'.

Roof waterproofing work that fulfills all: shortening construction time, reducing construction costs, improving productivity, and solving labor shortages. We provide everything necessary for waterproofing work. *Materials available upon request.

last updated May 29, 2025

Modified asphalt waterproof sheet "OS-sheets"

Stop rainwater with the self-adhesive seal part! Waterproof sheet with joint watertightness.

last updated May 29, 2025

Achieve not only the resolution of labor shortages but also a reduction in construction time! The easy-to-install 'Waterproofing Construction System'.

Achieving labor-saving in construction! A rooftop waterproofing revolution that pursues "easy, fast, and safe" while ensuring quality. [NTEIS registered product]

last updated May 29, 2025

Increase productivity in rooftop waterproofing work! For that, use the "OS-sheets Waterproofing System."

"Shortened construction period and increased productivity!" With a reassuring 10-year warranty. By shortening the construction period, we reduce construction costs and lessen the burden on residents!

last updated May 29, 2025

Lighten the burden of waterproofing work under the scorching sun! OS-sheets waterproofing system.

Reduce fire usage by 90% to improve harsh working conditions in summer! Suppressing fire also helps prevent heatstroke.

last updated May 29, 2025

"OS-sheets" has been registered in "NTEIS"!

The advancement of the "hybrid type modified asphalt sheet construction method" has been recognized.

last updated May 29, 2025

"Hybrid Type Modified Asphalt Sheet Construction Method" *NETIS Registered

It will bring transformation to the processes of the "exposed roof waterproofing insulation construction method" and "exposed roof waterproofing insulation method" in the standard specifications for public building construction!

last updated May 29, 2025

As a result of simplifying materials and processes... shortened construction period! Reduced waterproofing costs!

Easy construction ensures quality while shortening construction time, reducing costs, and increasing profits! The advancements in workability, environmental performance, and economic efficiency have been recognized, and it has been registered in NETIS.

last updated May 29, 2025

For sustainable effective use of rooftops! A collaborative system of solar power generation and rooftop greening.

Freely choose units for solar panel power generation and rooftop greening in shared spaces! Even after installation, you can change to solar panels, moss, soil plants, or vegetables.

last updated May 29, 2025

Waterproof sheet with a safe design that is sealed during sheet installation.

You can achieve temporary waterproofing with a protective seal (self-adhesive seal), so you can feel secure even in sudden rain! It guards against not only rainwater but also the intrusion of flames.

last updated May 29, 2025

One-component modified asphalt-based coating waterproofing material 'O-PHALT'

【Specialized Non-Target Waterproofing Material】・【F☆☆☆☆ Certification Obtained!】 A room temperature waterproofing method that considers people and the environment without the use of fire or solvents.

last updated May 29, 2025