Shin-Etsu Chemical has developed a high-strength inorganic thin-film coating liquid with excellent antibacterial and antiviral properties suitable for surface functionalization of building materials.

It has also been confirmed that the coated surfaces exhibit high antiviral activity against a novel coronavirus.


Shin-Etsu Chemical Co., Ltd. (Head Office: Tokyo; President: Yasuhiko Saitoh) has developed “Tersus®RN,” an inorganic thin-film coating liquid which possesses antibacterial/antivirus functions, envisioning its application for building materials for housing and buildings.

The Tersus® Series, which uses Shin-Etsu Chemical’s own unique silicate as an ingredient, is a coating liquid that forms a transparent thin film of natural finish that does not interfere with the building materials’ design. The newly developed Tersus®RN represents a new line-up in the series, and it has 2 kinds of nano particles as active ingredients, titania and silver, which can realize antivirus functions.

In the background leading to the development of this new product, there has been a rising of hygiene consciousness towards building materials in the midst of the coronavirus pandemic. At an external testing laboratory test*1, it was verified that on the surfaces where these products were applied, there was a high antivirus function exhibiting a strong inhibitory effect against the novel corona virus (SARS-COV-2), of 99.94% (R=3.2).

In addition, with regard to the general antibacterial/antivirus performance, Shin-Etsu has also obtained the certification of The Society of International sustaining growth for Antimicrobial Articles (SIAA).

This product is a water-based coating liquid and there is no worry about offensive odors or adverse effects on the human body at the time of application operation, which in the case with an organic-solvent-base becomes an issue.

This product will meet your expectations by realizing a highly hygienic environment, not only for use in environments where large numbers of unspecified people gather, such as offices, hospitals, public facilities, nursing facilities, automobiles and railway cars, but also for use as a coating liquid for various residential building materials.

This newly developed product will be introduced at the following exhibitions:


■Building Maintenance Fair Tokyo 2022
Host: Tokyo Building Maintenance Association
Dates: July 14 ~ July 15, 2022
Venue:  Tokyo Metropolitan Industrial Trade Center Hamamatsuchō
Booth: Shin-Etsu Astech Co., Ltd. Booth

■Building Maintenance & Clean EXPO 2022
Host: Japan Building Maintenance Association and Japan Management Association
Dates: October 26 ~ October 28, 2022
Venue: Tokyo Big Sight (Tokyo International Exhibition Center) 
Booth: Shin-Etsu Chemical Co., Ltd. Booth

Reference Material

Photo 1: Shown are the antibacterial/antivirus coating liquid Tersus®RN.

Photo 2: Shown are depictions of images of various materials where Tersus®RN applications are expected:
wall materials, wood building materials, textiles, paper/sheet and plaster/stucco.

*1 The testing laboratory is Kanagawa Institute of Industrial Science and Technology (KISTEC)
The antibacterial/anti-virus effects mentioned in this press release article do not indicate any preventative or treatment effects of illness. It indicates the inhibitory effect of bacterials/viruses that are attached to the surface and it does not directly work in space.
In addition, it does not guarantee that this product will show effectiveness against all bacterials and/or all viruses.



For inquiries about this matter, please contact

    • Shin-Etsu Chemical Co., Ltd.
    • Public Relations Dept.
    • Tetsuya Koishikawa
    • Tel: 03-6812-2340, or from outside Japan: 81-3-6812-2340
    • Fax: 03-6812-2341, or from outside Japan: 81-3-6812-2341
    • Contact us