List of General civil engineering materials products

100% recycled gypsum derived from waste gypsum boards is reused as raw material, achieving effective carbon neutrality during manufacturing!

• Gypsum board and moldings

Since the construction-generated soil will be recycled on-site, the disposal costs for leftover soil and the costs for new purchases will be significantly reduced. 【Disaster Prevention】

• Special Construction Method

Protecting office documents! Safeguarding important information from water damage.

• Water stop
• Other office supplies
• Rain protection items

Protect the front and guest rooms from flooding! Providing peace of mind with easy installation.

• Water stop
• Other office supplies
• Rain protection items

Protect your servers from water damage! Check out the actual product first with our free demo unit loan.

• Water stop
• Other office supplies
• Rain protection items

Protect your store from water damage! Come see the actual product first with our free demo items.

• Water stop
• Other office supplies
• Rain protection items

Protect your information assets with rapid flood measures. See the actual product with a demo unit.

• Water stop
• Other office supplies
• Rain protection items

Protect medical devices from flooding! Come see the actual product with our demo unit.

• Water stop
• Other office supplies
• Rain protection items

Protecting goods and warehouses! A simple-to-install flood barrier that protects cargo from water damage, replacing sandbags.

• Water stop
• Other office supplies
• Rain protection items

Protect your store's products! Easy-to-install flood barriers to protect your store from water damage.

• Water stop
• Other office supplies
• Rain protection items

Two people in two minutes! A simple-to-install water stop board that protects against flooding risks in factories and facilities, replacing sandbags.

• Water stop
• Other office supplies
• Rain protection items

Road mats that can create stable temporary roads on slopes and soft ground!

• Special Construction Method
• Ground improvement materials

■ Lightweight and easy to install ■ High erosion prevention effect ■

• Slope protection material

[Soil Erosion Prevention × Weed Control] An evolved version of weed control sheets has been released, capable of simultaneously solving the two major challenges of slope protection methods.

• Other park materials
• Slope protection material
• Landscaping materials

"No mowing for 10 years! *" A silicone-based filler with excellent weather resistance, 'Sukimahaze.'

• Joint material

Waterproof rubber used for various types of sluices and angle drains for dams, rivers, and reservoirs. *Selection materials that indicate the type for replacement, such as P-type and flat type, are al...

• Water stop

A strong ally for pillar construction work! It quickly solidifies troublesome mud, making transportation easier.

• Drainage material

Waterproof rubber used for various types of sluices, such as those for dams, rivers, and reservoirs.

• Water stop

[Data Download] We will explain the basic knowledge of lightweight embankment construction methods (beginner's edition).

• Lightweight embankment material
• Special Construction Method

[Data Download] We will explain the basic knowledge of the reinforced soil wall method (beginner's edition).

• Reinforced earth wall

[Data Download] We will explain the basic knowledge of ground reinforcement soil construction methods (Introduction).

• Reinforced earth wall

Resolving Common "Unexpected" Cases Before and After Construction Orders - Ground Improvement and Structural Reinforcement Edition -

• Ground improvement
• Reinforced earth wall

[Free Download] Reinforcement in Densely Built Areas and Narrow Locations! EP Route Pile Method

• Reinforced earth wall

The removal of wall materials and reinforcement materials is easy, allowing for partial skin repairs and replacements!

• Renovation and repair methods
• Reinforced earth wall
• Reinforcement and repair materials

[Data Download] Introduction of a wide range of lightweight embankment construction methods to reduce ground load in Japan, a country with many soft ground areas.

• Lightweight embankment material
• Special Construction Method

Guide to Examples of Reinforced Soil Wall Tail Arm Method

• Reinforced earth wall

It has been widely adopted in the reconstruction projects of the Hanshin Awaji and the Great East Japan Earthquake!

• Reinforced earth wall

Introducing a stainless steel drainage grate that is resistant to dirt and easy to clean!

• Drainage material

Stainless steel collection basket! Difficult for garbage to accumulate, hygienic! (Strainer, basket, cage)

• Drainage material

You can use a rich variety of colors to differentiate by area!

• Drainage material

Made of stainless steel, with a slope! An economical duster suitable for areas with low drainage volume: duster pit/drain trough/sanitary pit.

• Drainage material

Ideal for cart cleaning and rotary kettles! It is resistant to dirt and easy to maintain!

• Drainage material

A drainage pit divided into upper and lower sections! It has an easy-to-maintain structure!

• Drainage material

Stainless steel catch basket specifically for concrete manholes! (Strainer, basket, cage)

• Drainage material

High-quality proposal capabilities backed by abundant specialized knowledge! Quick response time!

• Water stop

The ability to respond to custom products and the speed of response! High-quality proposal capabilities backed by extensive specialized knowledge!

• others
• Water stop

It is a water-stopping material made from a liquid containing polyisocyanate compounds as the main component!

• Waterproofing Agent

Introduction to greening measures using acidic sulfate salt method materials and planting construction for alkaline soils!

• Slope protection material
• Planting work

Helpful for disaster recovery work! It is possible to shorten the construction period!

• Concrete Retaining Wall
• Concrete wall
• Stacking blocks

Introducing the Hamatait series, based on years of comprehensive rubber technology and considerate of the environment!

• Joint material

At Rontai, we handle three types of domestically produced seeds: Japanese pampas grass, power grass, and mugwort!

• Slope protection material

We offer a wide variety of native grasses, woody plants, and non-native grasses (tall and short)!

• Slope protection material

This is a list showing the seeds included in greening materials such as vegetation sheets, vegetation mats, and vegetation soil bags!

• Slope protection material

Water-curing solidified joint sand that balances workability and aesthetics.

• Joint material
• Concrete block, ALC panel, extrusion molded cement board construction
• Paving Materials

Slope protection works specialized for alkaline soil, such as embankments and tunnel spoil using cement-based solidifying materials (for ponds, retention basins, road improvements, and riverbank prote...

• Slope protection material
• Baskets and futon baskets
• Civil Engineering Method

No water leaks at all! The panel shape is strong not only against water stoppage but also against impacts from floating debris and other objects.

• Water stop