"Mitsuori Onmat" for Winter Concrete Curing Registered with MLIT's NETIS

Installation of "Mitsuori Onmat" on the concrete curing surface during the Asuwa River Dam Main Body Construction (Phase 2) (Photo courtesy of: Shimizu Corporation)

Sakai Chemical Industry Co., Ltd. (Head Office: Sabae City, Fukui Prefecture, Representative Director: Kiyoshi Sakai), a manufacturer of industrial plastic materials, is pleased to announce that "Mitsuori Onmat," a highly insulating sheet for winter concrete curing manufactured and sold by our company, was registered in the "NETIS (New Technology Information System)" of the Ministry of Land, Infrastructure, Transport and Tourism (MLIT) in May 2026.

NETIS Registration Number: CB-260001-A

"Mitsuori Onmat" is a highly insulating curing sheet that utilizes the hydration heat generated during concrete hardening while suppressing heat release to the outside air. Its lightweight, sheet-like structure contributes to labor saving and improved workability in winter concrete curing operations.

About NETIS Registration

NETIS is a database operated by the MLIT for the purpose of sharing and providing information on new technologies. It is used as reference information when considering the utilization of new technologies in public works projects.

With this registration, technical information on "Mitsuori Onmat" will be published on NETIS, allowing for broader consideration of its use in construction sites, including public works projects.

Three Features of "Mitsuori Onmat"

1. Suppresses Concrete Temperature Drop

By covering the curing surface after concrete placement, it suppresses the release of heat generated by the hydration reaction to the outside. It suppresses the temperature drop of concrete in winter and supports the maintenance of an appropriate curing environment.

2. Streamlines Curing Operations with Lightweight Sheet

The product is a sheet measuring 1,000mm x 2,000mm and weighs approximately 1kg per sheet. It is lightweight and easy to carry, and can be installed simply by laying it on the curing surface, contributing to reduced worker burden and increased efficiency of curing operations.

Our verification shows that it can reduce installation time by approximately 50% compared to conventional curing methods.

*Our Verification: Based on a comparison of installation time using Mitsuori Onmat and conventional roll-type curing sheets under conditions of 100m2 installation area and 3 workers.

3. Resistant to Dirt and Reusable

By laminating PET film on the surface, strength and water resistance are enhanced. It is easy to wipe off adhered moisture and dirt, and can be reused with proper handling, leading to a reduction in damage to curing materials and waste volume.

Actual Use in Asuwa River Dam Main Body Construction (Phase 2)

"Mitsuori Onmat" was adopted for winter concrete curing in the Asuwa River Dam Main Body Construction (Phase 2) and has undergone repeated verification for its workability and heat retention effects on site.

Utilizing the knowledge gained at this site, we have developed a product that contributes to the efficiency of curing operations under severe winter weather conditions and the assurance of stable concrete quality.

Asuwa River Dam Main Body Construction (Phase 2) (Photo courtesy of: Shimizu Corporation)

NETIS Registration Overview

Registration Number

CB-260001-A

Technology Name

Easy-to-Install Concrete Curing Sheet "Mitsuori Onmat"

Publication URL

https://www.netis.mlit.go.jp/netis/pubsearch/details?regNo=CB-260001%20

"Mitsuori Onmat" Product Overview

Product Name: Mitsuori Onmat Purpose: Heat insulation curing of concrete in winter Size: 1,000mm x 2,000mm Weight: Approx. 1kg/sheet Main Components: Foam sheet, PET film NETIS Registration Number: CB-260001-A Registration Date: May 2026

Spread out as a sheet and folded into three

Installation Size (Sheet form)

1000mm x 2000mm

Transport/Storage Size (Tri-fold)

1000mm x 660mm

Future Development

We will continue to develop products that can ensure the necessary thermal resistance values according to the weather conditions and construction environment of construction sites.

In addition to large-scale civil engineering projects such as dams, we will expand our product line for curing various concrete structures, contributing to the reduction of work burden, improvement of productivity, and reduction of waste from curing materials in winter construction.

About Sakai Chemical Industry Co., Ltd.

Sakai Chemical Industry started in 1963 as a manufacturer of synthetic resin processed products and currently operates in four product fields: films, foam sheets, bubble wrap, and plastic cardboard in the synthetic resin extrusion business.

With the desire to be a company that is necessary for the world, we aim to be a company that is needed by the world by continuously responding to our customers' requests.

Representative Director Kiyoshi Sakai

Head Office Location 32-1, Kawairicho, Sabae City, Fukui Prefecture, 916-0088

Homepage https://www.sakai-grp.com/

Online Shop https://store.sakai-grp.com/