List of General civil engineering materials products

You won't have time to evacuate from the earthquake to the tsunami's arrival! This is a "tsunami shelter" that dramatically increases survival rates against the tsunami approaching at a tremendous spe...

• Basement unit/disaster prevention shelter

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

Can be installed in uneven areas! A low-cost, highly versatile panel-type waterproof board.

• Drainage material

Perfect for underground parking lots! Waterproof boards that can be set up immediately in emergencies without the need for a storage location.

• Drainage material

Perfect for wide entrances and exits! Can be used as a gate during normal times.

• Drainage material

This is a waterproof board (water stop board, flood prevention board) that can be easily installed by operating a hydraulic pump. It can be set up quickly by one person and does not require storage sp...

• Drainage material

No storage location needed! A sheet-type waterproof board that can be set up immediately in an emergency.

• Drainage material

Perfect for wide spaces! No storage space needed! Waterproof board that can be easily installed by operating a hydraulic pump.

• Drainage material

Panel-type waterproof board! Supports maximum immersion height of up to 2 meters!

• Drainage material

Choosing Weed Control Sheets to Avoid Failure in Weed Management

• Civil Engineering Sheet

In recent years, weed control sheets have been introduced in a wide range of sectors. Please take a look at the examples adopted outside of roads.

• Civil Engineering Sheet

Excellent durability with a special three-layer structure! Chain stitch structure weed control sheet.

• Civil Engineering Sheet

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

Lightweight, rust-resistant, high-durability polyester net.

• Slope protection material

A covering material stronger than blue sheets. A mat that hardens gradually with watering and is easy to install.

• Civil Engineering Sheet

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

• Concrete Retaining Wall
• Concrete wall
• Stacking blocks

A product that conserves water, nourishes the earth, and protects greenery with consideration for the environment!

• Bentonite

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

• Joint material

The "labor-saving cage method" allows for easy and speedy construction using crushed stone as backfill material. [Crushed stone can be used]

• Baskets and futon baskets
• Slope protection material
• Embankment

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

The functions are different! It protects various assets from flooding caused by typhoons and heavy rain.

• Water stop

Numerous achievements in solar power generation sites. Significant erosion prevention effect.

• Slope protection material

High quality × low price × same-day delivery. Our in-house manufactured products can be shipped from our domestic warehouse on the same day.

• Pest and insect control products
• Slope protection material
• Exterior Materials

Case Study: [New Product] Weed Control for Sidewalk Joints Using NEO Sealing

• Civil Engineering Sheet

■■Maximum erosion prevention effect of embankment products■■Prevention of sediment runoff into rivers and other bodies of water■■

• Civil Engineering Sheet

Exhibiting the advantages of lightweight in soft ground! Significantly improving retaining wall and earth support construction through independence.

• Lightweight embankment material

A new construction method using unique reinforcement materials! It allows for shorter lengths of reinforcement materials.

• Reinforced earth wall

Structural stability and excellent design utilized in various scenes! Responding to the needs of embankment construction sites.

• Reinforced earth wall

Reliable quality that combines strength and flexibility! Solving various problems associated with embankments, subgrades, and weak ground.

• Lightweight embankment material
• Ground improvement materials

A new foundation for Japan. A leader in valuable infrastructure development and creativity.

• Road construction
• Slope protection material
• River construction

Lightweight and compact, making transportation and storage easy! Effective for disaster recovery and in remote mountain sites.

• Reinforced earth wall

It is widely used in general embankments, retaining walls, coastal areas, reservoir banks, and bridge abutments!

• Bridge Construction
• Reinforced earth wall

We will lend you a demo product for those who can't understand without seeing the actual item!

• Water stop
• Other office supplies
• Rain protection items

By shortening response times during disasters, we will reduce on-site downtime!

• Water stop
• Other office supplies
• Rain protection items

It can be used for leak prevention and extinguishing EV car fires by enclosing it inward.

• Rain protection items
• Other office supplies
• Water stop

The LOTUS Z delivered in the 1990s has been operating continuously for nearly 30 years. Z Engineering recommends regular inspections.

• Drainage material
• others

The trump card for decarbonization! A continuous emission type with no moving parts, made entirely of stainless steel!

• Drainage material
• others

Adopted for the purpose of protecting granite soil slopes, which are easily erosed. A case of protecting the slopes around the sediment control dam.

• Erosion control works
• Slope protection material
• Civil Engineering Method