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  1. Home
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  3. Building Materials
  4. Waterproofing, moisture-proofing and humidity control materials
  5. Waterproof sheet
  6. Modified asphalt waterproof sheet "OS-sheets"

Modified asphalt waterproof sheet "OS-sheets"

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last updated:May 29, 2025

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

"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.

    Waterproof sheet
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Modified asphalt waterproof sheet "OS-sheets"

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  • Related Link - http://robusto.jp/

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【Features (O-PHALT)】 ■ A one-component modified asphalt waterproofing material in emulsion type, primarily made from rubber and asphalt. ■ Forms a seamless waterproof layer without selecting the shape of the substrate. ■ No stirring required. ■ Quick-drying. *For more details, please refer to the PDF document or feel free to contact us.

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Modified asphalt waterproof sheet 'OS-sheets'

Modified asphalt waterproof sheet 'OS-sheets'

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NETIS Registration Information - Hybrid Modified Asphalt Sheet Method (OS-sheets)

NETIS Registration Information - Hybrid Modified Asphalt Sheet Method (OS-sheets)

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OS-sheets Waterproof System (OS-sheets) New Catalog

OS-sheets Waterproof System (OS-sheets) New Catalog

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Proposal for rooftop waterproofing work using the OS-sheets waterproofing system.

Proposal for rooftop waterproofing work using the OS-sheets waterproofing system.

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Company information

Robusto

Robusto

Building materials, supplies and fixtures manufacturers

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Robusto Co., Ltd. is a company primarily engaged in the manufacturing and sales of waterproof materials and other building materials and tools. To create products that fit the future of Japan, we prioritize "labor-saving in construction," "improvement of productivity," and "reduction of environmental impact." To ensure quality unaffected by human resources or environmental factors, we strive to bring semi-finished products as close as possible to finished products, simplify materials and processes, and avoid large tools and equipment whenever possible. By incorporating these considerations into our products and methods, we aim to reduce processes, labor, and environmental impact at construction sites, continuously preparing for the future of Japan. We offer products such as the simple and easy-to-install 'OS-sheets.' We can propose solutions tailored to our customers' needs and budgets, including asphalt waterproofing and sheet waterproofing. Please feel free to contact us with your requests.

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