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  6. Evaluation of "Water-based Rust Converter Select Coat N300" in the Ministry of Land, Infrastructure, Transport and Tourism's Demonstration Test.

Evaluation of "Water-based Rust Converter Select Coat N300" in the Ministry of Land, Infrastructure, Transport and Tourism's Demonstration Test.

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last updated:Apr 14, 2026

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Can be directly painted on rusted surfaces, reducing the effort of rust removal. A water-based powerful rust converter evaluated for performance in a demonstration test by the Ministry of Land, Infrastructure, Transport and Tourism. Contributes to labor-saving in repairs.

"Select Coat N300 (Rust Change)" is a water-based powerful rust converter that is not subject to organic regulations. If left untreated, red rust (an unstable state) will continue to progress, but by simply applying this product, you can convert the red rust itself into black rust (a stable state) protected by a strong binding force and a hard coating. Please feel free to contact us when you need our services. 【Features】 - A new rust prevention method that converts rust into a black coating, eliminating the need for complete rust removal (only loose rust needs to be removed) - Corrosion protection technology that has undergone verification tests and performance evaluations by the Ministry of Land, Infrastructure, Transport and Tourism - Applicable to iron surfaces, galvanized steel, aluminum, and other non-ferrous metals due to new bridging technology - Designed to accommodate everything from emergency measures to full-scale rust prevention strategies - Easy and safe to handle as a water-based single-component product 【Applications】 Rusty iron parts and products such as iron gates, fences, handrails, shutters, machinery, agricultural tools, steel structures, tanks, piping, containers, bicycles, and multi-story parking lots.

    Rust Inhibitor
N300?.png

Evaluation of "Water-based Rust Converter Select Coat N300" in the Ministry of Land, Infrastructure, Transport and Tourism's Demonstration Test.

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N300?.png アセット 1.png change.png panel_1.png panel_2.png
  • Related Link - https://www.alphapaint-group.com/products-sabi.htm…
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【Packaging】 - 16kg - 1kg

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Applications/Examples of results

**Selection and Registration Achievements in New Technology and New Construction Method Systems of Various Local Governments** This construction method has received a certain level of technical evaluation and has been registered and selected as follows in the new technology and new construction method systems of various local governments, which are in a third-party position: - February 28, 2024: Registered in the "List of New Technologies and New Construction Methods" by the China-Shikoku Agricultural Administration - March 8, 2024: Registered in the "New Technology and New Construction Method Utilization System" by Fukuoka Prefecture - March 15, 2024: Registered in the "New Technologies and New Construction Methods for Fiscal Year 2023" by the Kyushu Agricultural Administration - April 1, 2024: Registered in the "New Technology Information Provision Database System (IT'S)" by Ibaraki Prefecture - July 23, 2024: Registered in the "Promotion System for the Utilization of New Technologies, etc." by Miyazaki Prefecture - September 25, 2024: Registered in the "New Technology and New Construction Method Information Database" by Shizuoka Prefecture - November 5, 2024: Selected as "New Materials and New Construction Methods" by the Tokyo Port Authority - August 6, 2025: Selected as "New Technology" by the Tokyo Bureau of Construction - January 15, 2026: Featured in the report of the "Infrastructure Maintenance Practical Forum" for Fiscal Year 2025 (Civil Engineering Society Infrastructure Maintenance Committee) These registrations and selections are based on actual construction performance and performance evaluation results, serving as indicators of the practicality and reliability of this construction method. (*For performance materials, please inquire separately.)

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    In the Ministry of Land, Infrastructure, Transport and Tourism's technical recruitment (thematic type), it has been selected as a method that can be directly painted on rust. The results of the composite cycle test showed no signs of rust, peeling, or blistering, confirming high corrosion resistance performance.

  • 付着性試験(N300).png

    It has been confirmed through tests that even non-ferrous metals such as aluminum and zinc-coated materials, which are generally considered difficult to adhere to, show high adhesion properties. By simultaneously repairing corroded areas and protecting intact parts, a prolongation effect on the structure can be expected.

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Technical documentation for anti-corrosion paint and repair methods that can be applied over red rust.

Technical documentation for anti-corrosion paint and repair methods that can be applied over red rust.

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Proposal for Renewal Construction Method

Proposal for Renewal Construction Method

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Construction Procedure Manual (N300)

Construction Procedure Manual (N300)

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Red Rust Surface Anti-Corrosion Coating Specification (Simple Anti-Corrosion / Heavy Anti-Corrosion)

Red Rust Surface Anti-Corrosion Coating Specification (Simple Anti-Corrosion / Heavy Anti-Corrosion)

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Evaluation test for coating adhesion on non-ferrous metals

Evaluation test for coating adhesion on non-ferrous metals

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Ministry of Land, Infrastructure, Transport and Tourism Demonstration Test Results (Performance Evaluation of Red Rust Surface Coating Technology)

Ministry of Land, Infrastructure, Transport and Tourism Demonstration Test Results (Performance Evaluation of Red Rust Surface Coating Technology)

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Salt spray test results (5000-hour durability test)

Salt spray test results (5000-hour durability test)

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Red Rust Conversion Type Anti-Corrosion Coating Method Standard Coating Specification (Select Coat)

Red Rust Conversion Type Anti-Corrosion Coating Method Standard Coating Specification (Select Coat)

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[Civil Engineering Society Symposium Presentation] Practical Report on Black Rust Conversion Technology Published in J-STAGE

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A practical report on black rust conversion technology has been published on J-STAGE. This report summarizes practical examples presented at a symposium organized by the Japan Society of Civil Engineers. It organizes specific efforts and application cases in inspection, repair, and the introduction of new technologies, and can be used as reference material for engineers involved in infrastructure maintenance and management in selecting construction methods and technical considerations. The symposium serves as a venue for technical exchange aimed at collaboration among industry, academia, government, and the private sector, with participation from infrastructure managers, researchers, and companies nationwide. The presentation content has been organized as "practical research papers" and "reports" and is available on J-STAGE. You can check the relevant report by searching for "Alpha Paint" at the URL below. Please refer to it as one of the materials for consideration, shared as specialized technical information in a public forum.

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Building materials, supplies and fixtures manufacturers

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Alpha Paint Co., Ltd. is a company that sells high-performance eco-friendly products such as heat-insulating paints and rust conversion paints. Our main products include the heat-insulating paint "Select Coat S110" and the rust conversion anti-corrosion paint "Select Coat N300." Alpha Paint aims to prevent global warming and maintain and protect the environment through the development and manufacturing of eco-friendly products.

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