Special Technology That Prevents Deterioration

Long-Term Water Tank Life Extension Method Sus Coating Sus Coating

  • No Repainting
    No Tank Replacement
    Required
  • Japanese Patented Technology
  • Protecting Life-Sustaining Water

An option to use existing tanks longer
and more safely without replacement

  • Applied directly to base material
    without primer
  • Contains SUS316L
  • Numerous installations in Japan
  • Blocks light transmission for hygienic water storage
  • Applicable regardless of installation location
  • Transforms appearance

Sus Coating is

The only water tank life extension method utilizing patented technology

※Beware of imitations and counterfeits
※Unauthorized use of images or content from this page will result in immediate legal action for copyright infringement.
 Upon discovery of copyright infringement, strict measures including claims for damages will be taken.

Water storage tanks have a standard service life of 15 years, as determined by structural design calculation methods for water tanks.
FRP water storage tanks suffer from aging degradation, leading to exposed and scattered glass fibers from the reinforcing material. Conventional countermeasures like light-blocking coatings or FRP lining only provide temporary repairs.
Degraded panels carry an increased risk of damage, leading to more cases requiring urgent repairs.

Sus Coating is a revolutionary technology that protects the base material using stainless steel pigment (SUS316L) and special resin, eliminating the need for primer.
It is not merely a surface treatment through painting, but an external coating technology that fundamentally extends the lifespan of water tanks, becoming the new standard in the water tank maintenance industry.

MOVIE

Learn more about
Sus Coating in our video

RISK OF DELAY

Water tank replacement is inevitable...
Putting off replacement work because it ‘still works’ can lead to
water storage issues,
or necessitate unnecessary repairs like panel damage...

  • CASE1
    Water Tank Rupture Accidents
    Due to Aging Deterioration

    Recent abnormal weather has accelerated water tank deterioration. In 2020, a commercial facility's water tank ruptured due to aging deterioration, unable to withstand the internal water pressure.
    Putting off tank replacement because it “still works” not only compromises water storage hygiene but also risks unnecessary repairs due to panel damage and even potential human casualties.
    Tank replacement and maintenance are essential before such disasters occur.

  • CASE2
    Is your water storage
    safe and secure?

    FRP deteriorates in about 10 years, allowing sunlight to penetrate. This causes photosynthesis inside the tank, leading to algae growth and bacterial proliferation.
    Even if the tank interior is cleaned annually, it often returns to the same condition within six months, sometimes containing dirt and bacteria.
    Applying Sus Coating

    CASE2

DETERIORATION

Primary Deterioration Phenomena
in Water Tanks

  • Exposed Glass Fiber

  • Cracks

  • Leaks

  • Rust on Support Frames

  • Internal Rust

  • Peeling Paint

Perform Thorough Repairs

Solve Problems with Sus Coating !

BEFORE & AFTER

Complete Water Leak Prevention for Water Tanks

Internal Water Tank Coating
Polyurecoat®

BEFORE & AFTER

Reborn and Protected by Sus Coating

"With Sus Coating's specialized treatment, water tank replacement becomes unnecessary.
No repainting is required, enabling long-term extension of the tank's base material lifespan."

Before
After
Before
After
Before
After
Before
After

WHY CHOOSE US

The Reasons Why Sus Coating is Chosen

  • Light Blocking

    With 0% total light transmittance, it prevents algae and bacteria growth inside the tank, preserving water quality.

  • Weather Resistance

    A coating with stainless steel pigments protects the tank from salt damage, sunlight, acids, and more.

  • Rust Prevention

    Forms a highly corrosion-resistant coating, preventing rust and corrosion on metal parts.

  • Adaptability

    Can be applied directly to virtually any substrate material except silicone.

  • Adhesion

    Can be applied without a primer coat on the substrate, preventing damage to the base material.

  • Cost-Effectiveness

    Significantly reduces costs compared to tank replacement.

  • Environmental Benefits

    Extends the lifespan of existing tanks, reducing industrial waste generation.

  • Short Construction Period

    No water shutdown required; only external coating needed. Fast-drying properties minimize construction time.

RELIABLE TEST DATA RELIABLE TEST DATA RELIABLE TEST DATA PROVES OUR QUALITY SUS Coating

Reliable test data
guarantees quality

To ensure reliable use,
Sus Coating undergoes rigorous testing by third-party institutions, including weather resistance tests, adhesion tests, coating strength tests, and salt spray tests.
Test results demonstrate perfect performance, covering not only light-blocking properties but also coating strength.
For details, see the [Various Test Data] below.

Various Test Data Here

COMPARISON

Comparison with
Conventional Methods

Calculated for a 4m (H) x 5m (W) x 2.5m (D)
50t elevated water tank

Estimates in Japan

Comparison Table with Conventional Methods Comparison Table with Conventional Methods

LONG-TERM VALUE

A valuable choice
considering the next 20 to 30 years

Installed on a tank 15 years after installation, it has now been 22 years,
preventing paint film peeling and rust on the support frame bolts.
(As of 2025)

20年後の状態 20年後の状態

REPAIR

Before and After Installation

Manhole Cover

Contains the “exposed fiberglass” commonly seen
in many water tanks, halting deterioration.

Before Installation
After Installation

Light Blocking Inside the Tank

Prevents algae growth and bacterial proliferation
by blocking light transmission,
maintaining hygienic water storage.

Before Installation
After Installation

CASE STUDY

Implementation Track Record

商業施設

Commercial Facilities

病院

Hospitals

オフィスビル

Office Buildings

学校

Schools

温浴施設

Hot Spring Facilities

食品工場

Food Processing Plants

The patented
“Sus Coating” technology extends
the lifespan of water storage tanks,
contributing to society.

  • Safe Water and
    Sanitation for All

    Applying Sus Coating contributes to water quality preservation, ensuring safe and secure water supplies.

  • Sustainable Cities and
    Communities

    Sus Coating significantly extends the lifespan of water storage tanks beyond normal expectations, protecting environments where people can live sustainably.

  • Responsible Production and
    Consumption

    Sus Coating reduces industrial waste by extending the lifespan of existing water tanks.

SDGS画像

FAQ

Frequently Asked Questions

  • Q Is repainting unnecessary after applying Sus Coating?

    A No renewal or repainting is required.
    With 39 years of proven results, various tests confirm it does not degrade the base material.

  • Q How long does the water need to be shut off?

    A Sus Coating can be applied while the tank is in use, so there is no need to worry about water outages.

  • Q Can it be applied to a water tank over 20 years old?

    A Yes. While applying it to a new tank preserves the base material as new,
    it can also be applied to tanks over 20 years old if they are currently usable.

  • Q How much savings can we expect?

    A Replacing a 50-ton tank costs approximately ¥15 million, and replacement is typically needed again in about 20 years.
    Sus Coating, on the other hand, is a unique tank life extension method costing around ¥6 million that eliminates the need for repainting.

  • Q Can you estimate the total cost?

    A "Please contact us via the form below, and we will send you an estimate request form.
    Once you complete the necessary details on the estimate request form, we will provide you with an estimate within about one week."

  • Q Is it possible to become a distributor?

    A "We are recruiting authorized sales distributors for Sus Coating nationwide.
    For details, please contact us via the inquiry form below.
    *We are not recruiting construction contractors."

CONTACT

Inquiry

    Inquiry Type

    Photos or Drawings of Water Tank
    (Front and Side Views Required) [Optional]

    Handling of Personal Information

    Personal Information Protection Management Policy

    Sus Coating (hereinafter referred to as “the Company”) establishes the following Personal Information Protection Policy regarding the handling of personal information obtained from customers (hereinafter referred to as “Customers”) who use this website.

    1. Definition of Personal Information
    Personal Information refers to personal information as defined by the Personal Information Protection Act. It means information about a living individual that can identify a specific individual through the name, date of birth, address, postal code, telephone number, gender, occupation, age, or other descriptions contained in such information.
    ・Within personal information, “history information” and “characteristic information” refer to information other than the personal information defined above. This includes the history of pages and advertisements viewed by the Customer, search keywords entered, visit dates and times, information transmission dates and times, usage environment, IP address, cookie information, location information, device identification information, etc.

    2. Methods of Collecting Personal Information
    We collect personal information provided by customers through inquiry forms. We may also collect history information and characteristic information when customers view pages or send information.

    3. Purpose of Collecting and Using Personal Information
    We use personal information provided by customers for the following purposes:
    ・To respond to inquiries by sending emails, mailing materials, or contacting customers by phone
    ・To provide information about products and services, including announcements, advertisements, promotions, direct mailings, and various proposals
    ・To aggregate as statistical information and use as reference material for improving products, services, or business activities

    4. Prohibition of Disclosure or Provision of Personal Information to Third Parties
    We will manage the personal information entrusted to us by customers appropriately and will not disclose it to third parties except in the following cases:
    ・When the customer has given consent
    ・When disclosure is made to contractors to whom we outsource operations due to business necessity, such as for information processing or maintenance
    ・When disclosure is required by law

    5. Correction and Deletion of Personal Information
    If the personal information held by our company is incorrect, customers may request its correction or deletion through the procedures established by our company.
    ・If our company receives a request under the preceding paragraph and determines it is necessary to comply, we will promptly correct or delete the personal information and notify the customer.

    6. Suspension of Use of Personal Information
    If a customer requests the suspension or deletion of the use of their personal information (hereinafter referred to as “suspension of use, etc.”) on the grounds that the personal information is being handled beyond the scope of the purpose of use or was obtained by improper means, the Company shall promptly conduct the necessary investigation. Based on the results, the Company shall suspend the use of the personal information and notify the individual accordingly. However, if the suspension of use, etc., involves substantial costs or is otherwise difficult to implement, and if alternative measures necessary to protect the rights and interests of the individual can be taken, we will implement these alternative measures.

    7. Changes to the Privacy Policy
    We may change the content of our Privacy Policy without notifying customers. Unless otherwise specified by us, the revised Privacy Policy shall take effect upon its posting on this website.

    8. Inquiries
    For inquiries regarding our Privacy Policy, please contact us at the address below.

    Sus Coating
    Operating Company: Shu Inc.
    4F, Koyo Building, 2-2 Sakuragicho, Naka-ku, Yokohama-shi, Kanagawa
    〒231-0062
    E-mail: info@shu-inc.jp

    Legal Counsel
    Shinsei Sogo Law Office
    Attorney: Shunsuke Nishimoto

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