Robusto List of Products and Services

We would like to introduce the modified asphalt waterproof sheet "OS-sheets" handled by Robusto. Waterproofing, in essence, is a mechanism to prevent water from entering the structure of a building in order to protect it from rain leaks and deterioration. For example, in the case of concrete buildings, over time, due to the degradation and behavior of the building, cracks may develop in the concrete. If rainwater enters through these cracks, it can permeate, causing leaks and leading to the corrosion of the rebar within the concrete. Waterproofing protects buildings from water and helps them last longer. *For more details, please refer to the PDF materials or feel free to contact us.

Introducing the modified asphalt waterproof sheet "OS-sheets" handled by Robusto. There are various types of waterproofing, including the "coating method," which can accommodate complex shapes, the "sheet method," which creates a uniform thickness of the waterproof layer, and the "coating + sheet method," which produces a thick waterproof layer with high waterproofing properties. Traditionally, two processes were required: a ventilation layer and a waterproof layer to allow moisture to escape. With "OS-sheets," it is possible to consolidate these processes. Two processes are reduced to one. 【Types of Waterproofing】 ■ Coating method (membrane waterproofing) ■ Sheet method (sheet waterproofing) ■ Coating + sheet method (asphalt waterproofing thermal method) *For more details, please refer to the PDF materials or feel free to contact us.

We would like to introduce "OS-sheets," a modified asphalt waterproof sheet handled by Robusto. The methods for asphalt waterproofing construction include the traditional hot method and the cold methods (torch method and self-adhesive method). "OS-sheets Z40" utilizes minimal use of a torch burner in the cold method, taking advantage of the thermal welding benefits of the torch method while also incorporating the high construction efficiency of the self-adhesive method. 【Cold Method】 ＜Torch Method＞ ■Features - A method where the back side of the modified asphalt roofing sheet is heated with a torch burner and applied while melting. - OS-sheets Z40 melts the sheet itself to weld the seams. *For more details, please refer to the PDF document or feel free to contact us.

"OS-sheets" are single-layer sheets that enable the functions of the traditional two-layer system: a "bottom" ventilation layer and a "top" waterproof layer. As a result, the conventional lamination process has been shortened to one step, allowing for a reduced construction period. 【Features】 ■ Sand granules: Protect the waterproof layer and prevent UV degradation ■ Modified asphalt: Asphalt with additives such as rubber and plastic ■ Synthetic fiber non-woven fabric: Improves dimensional stability and tensile strength ■ Partially adhesive self-adhesive layer: Maintains breathability while also excelling in insulation *For more details, please refer to the PDF document or feel free to contact us.

We received valuable feedback from a customer who manages a condominium where Robusto's modified asphalt waterproofing sheets "OS-sheets" have been introduced. 【Customer Feedback】 While searching for a company to carry out waterproofing work, I happened to find Robusto's website and made an inquiry. I contacted them by phone, and the representative was very kind and left a good impression. They also quickly sent me the estimate. The construction was done carefully, and I am really glad I made the request. *For more details, please refer to the PDF document or feel free to contact us.

The modified asphalt waterproof sheet "OS-sheets" is a modified asphalt sheet using a cold self-adhesive method, which excels in adhesion to the substrate and breathability. The joints and edges of the sheet are fused using a torch burner. It is a hybrid type modified asphalt sheet that combines the advantages of the self-adhesive method and the waterproofing of the torch method, reducing the heat generation during installation to below 10% compared to conventional torch methods. It is also environmentally friendly and offers economic benefits. 【Features】 ■ Hybrid sheet combining the advantages of cold self-adhesive and torch methods ■ Excellent adhesion to the substrate and breathability ■ Reduces heat generation to about 10% ■ Environmentally friendly and labor-saving ■ Shortens construction period ■ Addresses labor shortages ■ Economic benefits 【Specifications】 Modified asphalt sheet (synthetic fiber non-woven fabric + modified asphalt) 1.0m × 8.0m, thickness 4.0mm, surface with sand granules, back with partial adhesive layer 【Other Features】 ■ The partial adhesive layer on the back allows for adhesion to the substrate, providing both breathability and waterproof performance with a single sheet. ■ The sheet joints are fused through heating with a torch burner, ensuring complete integration and waterproofing. ■ Installation is possible even over large areas using only a handheld torch burner.

The "OS Hand Burner" is a burner that uses a screw-in can type gas cartridge. Despite its compact and lightweight design, weighing only 350g per can, it can produce strong flames suitable for tasks that previously required LP gas (propane). It features an automatic extinguishing function for safety; the burner automatically extinguishes when the "ignition button" is released. It is also used for joining waterproof sheets, providing sufficient flame power and burn time. Additionally, when set in a dedicated waist pouch, it allows for easy mobility without the need to carry large, heavy LP gas cylinders, saving time and effort. 【Do you have any of these concerns?】 ■ Insufficient power with household burners... ■ Unable to bring in large propane gas cylinders... ⇒ We can solve these problems! <Usage Examples> Construction sites / Various manufacturing facilities / Restaurants, etc. We will be exhibiting at the 1st Waterproof Technology Exhibition. Please come and see the actual product! *For more details, please refer to the PDF materials or feel free to contact us. *Using the "OS Hand Burner," it is also possible to torch waterproof sheets. For more details, please check the following link: [Introduction to torching waterproof sheets using the "OS Hand Burner" - Video available].

The "OS-sheets Waterproofing System" is a waterproofing construction system provided using waterproof materials (OS-sheets & O-PHALT) and tools (OS hand burner). It possesses the necessary functions and performance to guarantee a waterproof layer for 10 years and can accommodate various shapes and substrates. It is easy to use, highly productive, reduces waterproofing costs, and minimizes environmental impact. 【Features】 ■ While being a single-layer sheet, it has the functionality of two layers: a ventilation layer (under layer) and a waterproof layer (top layer), allowing for process elimination and shortening of construction time. ■ Combines the ease of installation of self-adhesive methods with the watertightness of torch methods. ■ Simply melt and bond the joints and edges of the sheet with a torch burner. ■ CO2 emissions can be reduced to below 10% compared to sheets that are heated over the entire surface. *For more details, please refer to the PDF document or feel free to contact us.

The "OS-sheets Deaeration System" is a deaeration tube that ensures a continuous deaeration path from the ventilation layer. It has been developed as a deaeration tube that further enhances the benefits of OS-sheets. *Patent obtained! Patent No. 7001280 ★What are OS-sheets? "OS-sheets" are single-layer sheets that have two essential functions (breathability and waterproofing) for waterproof sheets. They are single-layer modified asphalt waterproof sheets that conform to JIS A 6013, possessing the same functions as two-layer sheets while allowing for reductions in materials, processes, and labor, as well as shortening construction periods. *For more details, please refer to the PDF materials or feel free to contact us. *The effectiveness is demonstrated when used with "OS-sheets"! For more information, please check below: 【【Addressing Labor Shortages】10-Year Warranty (extendable) Modified Asphalt Waterproof Sheet 'OS-sheets'】.

"We want the OS hand burner (our conventional product) to be more powerful." In response to such requests, the upgraded 'OS Hand Burner Magnum' has been newly released! Weighing only 400g at the nozzle and measuring just 276mm in length, it is very compact, yet it achieves a flame temperature of approximately 1,400℃. With a maximum output of 17,000kcal/h, it is about 3.8 times more powerful than the conventional OS hand burner, which is a significant feature. Even in narrow work environments where high flame power is needed and bringing in large burners is difficult, torch work can be easily performed using a gas canister. Additionally, both large gas canisters and screw-type gas cartridges can be used, allowing for selection based on usage, thus expanding its applications in various scenarios. [Features] - Compatible with both large gas canisters and screw-type gas cartridges - Lightweight and compact yet powerful, achieving high operability - Equipped with a convenient one-touch ignition feature for easy lighting with just hand operation - Connecting to a large gas canister frees you from the hassle of can replacement and disposal, making work easier *For more details, please refer to the PDF document.

Due to the peak in the number of households and the acceleration of an aging society, Japan will face a future where, even if construction occurs, there will be a shortage of both "money" and "people" to carry out the work. In response, we propose the OS-sheets waterproofing system for rooftop waterproofing projects. "OS-sheets" integrates the two-layer sheet lamination process of the conventional on-site underlay (ventilation sheet) and overlay (waterproof sheet) in a factory (labor-saving). By omitting processes at the construction site, we can reduce the number of workers needed, making it possible to carry out more construction projects. 【Challenges】 ■ Peak in the number of households → Shortage of construction funds - Increase in vacancies in apartment buildings - Decrease in repair funds such as reserve funds ■ Acceleration of an aging society → Decline in construction productivity - Significant decrease in the working-age population (ages 15 to 64) - Chronic labor shortages - Shortage of skilled workers *For more details, please refer to the PDF document or feel free to contact us.

"OS-sheets" are environmentally friendly, economically effective, and feature excellent durability of modified asphalt and watertight joints, while also possessing compatibility with the substrate and breathability as a waterproof single-layer sheet. By shortening the process, it leads to reduced construction time and costs. At the time of sheet installation, the self-adhesive seal at the joint blocks the intrusion of rainwater! You can rest assured even during sudden rain. Furthermore, only the sheet joint area is heated, allowing for large-scale installation using just a hand torch burner. Additionally, we offer a one-component modified asphalt-based coating waterproofing material called "O-PHALT." 【Features】 ■ Sandwich structure of modified asphalt layer ■ Minimizes the use of open flames ■ Safe design that seals during sheet installation ■ Equipped with temporary waterproofing function *For more details, please refer to the PDF document or feel free to contact us.

The "Waterproofing Construction System" is a system that leverages the strengths of "waterproof sheets (OS-sheets)," "small burners (OS-Hand Burner)," and "coating waterproofing (O-PHALT)" to create synergistic effects. It demonstrates effectiveness through the combination of easy-to-install waterproof sheets (OS-sheets) and small burners (OS-Hand Burner), and can accommodate various shapes with the use of coating waterproofing (O-PHALT). 【Are you facing any of these issues?】 ■ Even if you can receive construction orders, there are no workers available... ■ You want to shorten the construction period to start the next project... ■ You want to fill propane gas, but obtaining gas is difficult... ■ Can you guarantee leak-proofing for 10 years? ⇒ These problems can be solved with the 'OS-sheets Waterproofing System'! Additionally, by only heating the joint areas during installation, CO2 emissions are significantly reduced. With the excellent functionality of OS-sheets, we are considering the environment and achieving improved productivity. *For more details, please refer to the PDF materials or feel free to contact us.

In Japan, where population decline and a decrease in the number of households are progressing, buildings with an increasing trend of vacant rooms are becoming more common. Furthermore, due to the impact of the COVID-19 pandemic, there have been reductions in rent, unpaid rents, and evictions. In a situation where there are few tenants due to the COVID-19 shock, it is anticipated that there may be a shortage of repair reserve funds and repair costs, which could prevent necessary waterproofing work from being carried out, or lead to expenses for other priorities. Nevertheless, maintenance and quality management of the building cannot be overlooked. To break such a situation, our company proposes the "OS-sheets Waterproofing System." The "OS-sheets Waterproofing System" reduces the financial burden on building and condominium owners and shortens construction periods, thereby reducing the burden on tenants. Additionally, it is a reliable waterproofing system with a 10-year warranty. **Benefits of the OS-sheets Waterproofing System** - Reduces construction costs - Shortens construction periods to lessen the burden on tenants - Reliable 10-year warranty *For more details, please refer to the PDF document or feel free to contact us.*

Especially during the summer season, the work of heating and melting the entire backside of the sheet with a large propane gas burner in the torch method is an extremely harsh environment for workers. By integrating the application process of ventilation sheets and waterproof sheets, which use a large amount of fire, with factory machinery, OS-sheets have improved quality and reduced on-site processes. Furthermore, since OS-sheets only require torch work at the sheet joints, it is about 1/10 compared to conventional torch methods. This significantly reduces the amount of torch burner work, alleviating the burden on workers. CO2 emissions are also reduced, allowing for construction that considers both workers and the environment. This reduction in processes and workload creates more flexibility in the construction schedule, enabling work to be done while avoiding the hottest times of the day, which helps prevent heatstroke. *For more details, please refer to the PDF document or feel free to contact us.*

The hybrid modified asphalt sheet construction method we handle, 'OS-sheets,' has been recognized for its advancement and registered as a new technology in NETIS on November 30, 2020. The main points registered in NETIS include "shortened construction period," "no need for skilled labor required for torch bonding," and "increased construction speed." This method using our product brings revolutionary changes to the processes outlined in the public building construction standard specifications for "Roof Exposed Waterproof Insulation Construction ASI-T1" and "Roof Exposed Waterproof Insulation Construction AS-T3." [Benefits of Using NETIS Registered Technology] ■ Using new technology (NETIS) in construction → Possible to shorten construction period and reduce costs ■ Using new technology (NETIS) in public works, etc. → Points added in comprehensive evaluation method ■ Proposals for utilizing new technology from contractors → Eligible for additional points in construction performance evaluation *For more details, please refer to the PDF materials or feel free to contact us.

The hybrid modified asphalt sheet construction method "OS-sheets," which our company handles, has been recognized for its advancement and registered as a new technology in NETIS on November 30, 2020 (NETIS number: KT-200118-VR). The main contents registered in NETIS are: 1. Shortened construction period 2. Quality assurance 3. Reduced burden on workers and the natural environment 4. Cost reduction This construction method using our product will bring revolutionary changes to the processes outlined in the public building construction standard specifications for "Roof Exposed Waterproof Insulation Method ASI-T1" and "Roof Exposed Waterproof Insulation Method AS-T3." 【What’s amazing about the OS-sheets Waterproof System】 ■ Reduced installation steps due to the single-layer sheet → Reduced work burden, shortened construction period, and cost reduction ■ Torch bonding only at the joints significantly reduces the workload to about 1/10 of conventional techniques → Increased construction speed ■ Easy confirmation of torch melting results → No need for the skill required for torch bonding ■ Using the OS hand burner for torching the joints of "OS-sheets" → Reduced risk of burns and fires for workers / Reduced workload for handling gas burners *For more details, please refer to the PDF materials.

In the typical modified asphalt waterproofing torch method, the process begins with the installation of a ventilation sheet, followed by the application of a sand-coated sheet, where the entire back surface is heated and melted using a torch burner. This process requires a high level of skill and places a significant burden on the workers. OS-sheets have mechanized the entire torch sheet heating process at the construction site in a factory setting, which has improved quality and reduced the burden on workers, while also eliminating one step in the construction process. The torch work at the construction site is now limited to the sheet joint areas, allowing for approximately a 90% reduction in the use of open flames compared to the typical modified asphalt waterproofing torch method, significantly lowering CO2 emissions and the burden on workers. As a result, the speed of waterproofing construction has increased, and stable quality improvements have been achieved while considering the natural and working environments. OS-sheets enhance productivity with a smaller workforce, shorten construction periods, and enable more waterproofing projects to be completed. Additionally, the OS-sheets waterproofing system has a simple material composition, making inventory management easier and reducing transportation costs. By simplifying materials and processes, various costs can be reduced, allowing for the generation of additional profits.

Robusto's greening system is designed with consideration for the maintenance of rooftop waterproofing layers and greening. By standardizing the foundation (base) and installation spacing (pitch) for the solar power generation and greening systems on rooftops, it allows for flexible choices in application and area, and changes can be made after installation. Additionally, since the waterproof layer is completed up to the foundation (base), the responsibility for waterproofing (leakage guarantee) is clearly defined regardless of the use above the foundation. **Benefits of adopting a rail-type planting tray platform:** - Flexible response to rooftop applications - Improved maintenance - Extension of the waterproof layer's lifespan - Delayed drainage effect *The moss does not require soil and is lightweight. It is maintenance-free and can survive in harsh environments in a dormant state, making it a sustainable material found anywhere in the Northern Hemisphere.* *Our greening system has recently obtained a patent and has been registered with NETIS.* - Patent No. 7289159: "Greening System and Planting Unit Used Therein" - NETIS Registration No.: No. KT230138-A "Rooftop Waterproofing Compatible Planting Frame Installation Method" *For more details, please refer to the PDF materials or feel free to contact us.*

The OS-sheets are 1 meter wide and 7 meters long, with a 10 cm wide joint section on the long edge (side lap). Of that, 1 cm is a protective seal (self-adhesive seal section), and the remaining 9 cm is welded using a torch. During the sheet installation, it features a temporary waterproof function sealed by the 1 cm self-adhesive section, allowing the installation work and torch work to be performed separately, enabling the torch work on the side lap to be carried over to the next day. Even in the event of sudden rain, you can work with peace of mind thanks to the temporary waterproof function. Additionally, during the torch work at the sheet joint, the protective seal prevents flames from entering the sheet interior, allowing for safe installation without worrying about the substrate. *Please check the actual waterproof performance in the video on this site.

"O-PHALT" is a one-component modified asphalt waterproofing material of emulsion type, primarily made from rubber and asphalt. It forms a seamless waterproof layer without selecting the shape of the substrate. Additionally, it does not contain substances subject to the Industrial Safety and Health Act or the Specific Chemical Substances Hazard Prevention Regulations, such as formaldehyde and other environmental hormone-related substances, allowing for safe application in various locations, both indoors and outdoors. 【Features】 ■ Environmentally friendly waterproofing material not subject to specific regulations ■ Safe and secure application without the use of fire or solvents ■ Forms a seamless waterproof layer with asphalt-based waterproofing material ■ F☆☆☆☆ certification obtained ■ No mixing process required, ensuring stable quality *For more details, please refer to the PDF document or feel free to contact us.