An option to use existing tanks longer and more safely without replacement
Applied directly
to base material
without primer
ContainsSUS316L
Numerous installations
in Japan
Blocks light transmission
for hygienic water storage
Applicable regardless
of installation location
Transforms
appearance
is
The only water tank life extension method utilizing patented technology
※Beware of imitations and counterfeits
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FRP water storage tanks are designed with a standard service life of 15 years under the Structural Design Calculation Method for FRP Water Tanks.
Exceeding 15 years does not mean that a tank immediately becomes unusable. However, long-term exposure to UV radiation, rain, and other weather conditions can gradually cause chalking, exposed glass fibers, and corrosion of metal components. Exposed glass fibers may also scatter into the surrounding area.
As deterioration progresses, it can lead to leaks, panel damage, and emergency repair work.
For this reason, it is important to consider protection and life-extension measures while the tank is still in service.
Sus Coating® is a special resin coating containing SUS316L stainless steel pigment, applied directly to the substrate without primer.
The coating adheres directly to the substrate and protects the water tank from external factors such as UV radiation, acid rain, and salt damage.
More than a cosmetic repaint, Sus Coating® is an innovative external protection and long-term life-extension method designed to protect existing water tanks and keep them in service longer.
MOVIE
Learn more about Sus Coating in our video
RISK OF DELAY
Water tank replacement is often unavoidable.
However, postponing deterioration countermeasures or replacement
simply because the tank “still works” can lead to problems with water storage, leaks,
panel damage, and emergency work that might otherwise have been avoided.
Risk of Damage and Rupture
Due to Aging Deterioration
In recent years, increasingly severe weather conditions have made the environment around outdoor water tanks more demanding.
Long-term exposure to UV radiation, high temperatures, rain, and wind can cause deterioration of panels and joints to progress, potentially leading to leaks, damage, or even rupture.
In 2020, an FRP receiving tank at a commercial facility suddenly ruptured, releasing a large volume of water.
Delaying deterioration countermeasures or replacement because the tank “still works” can result not only in emergency repairs and water outages but, depending on the circumstances, may also lead to personal injury.
Early inspection and consideration of protection and life-extension measures are important before a major accident occurs.
Is your water storage safe and secure?
As FRP water storage tanks age, their light-blocking performance may deteriorate, allowing sunlight to enter the tank and creating conditions in which algae can grow more easily.
Sunlight is also one factor that can reduce residual chlorine, making it more difficult to maintain a hygienic water storage environment if light continues to enter the tank.
Even if the tank interior is cleaned once a year, algae and dirt may recur if sunlight continues to penetrate from outside.
Sus Coating® forms a coating with 0% total light transmittance, blocking light from entering the tank.
This helps suppress algae growth, supports the maintenance of residual chlorine, reduces the risk of bacterial growth, and contributes to water quality preservation.
CONCERNS
Do You Have Any of These Concerns About Your Water Tank?
Water tank replacement is expensive and difficult to budget for.
Issues have been identified during cleaning or inspections.
The tank has been in service for more than 15 years, and we want to take preventive action.
We are concerned that exposed glass fibers on the roof or other areas may scatter.
We are concerned about leaks or panel damage.
We want to extend the tank’s service life without shutting down the water supply or facility operations.
We are unsure whether replacement or repair is the right option.
We are concerned about issues being raised by local health authorities.
Solve Problems with
!
Support from Qualified Water Tank Specialists
Our qualified specialists support your project from consultation and
condition assessment through proposal and implementation.
Water Storage Tank Diagnostician
Water Storage Tank Management Technician
Water Use Equipment Environmental Hygiene Specialist
By applying Sus Coating®, existing water tanks can remain in service without replacement
while their appearance is restored and the FRP substrate is protected from the outside for long-term use.
REPAIR
Detailed Application Results
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
WHY CHOOSE US
The Reasons Why
is
Chosen
Light Blocking
0% total light transmittance. Blocks light from entering the tank, helping suppress algae growth and maintain a hygienic water storage environment.
Weather Resistance
The SUS316L-containing coating protects the substrate over the long term from UV radiation, acid rain, salt damage, and other external factors.
Corrosion Protection
Forms a highly corrosion-resistant coating on metal components, suppressing the progression of rust and corrosion for long-term protection.
Adaptability
Can be applied directly to a wide range of substrates, including FRP, PP, PE, and metal components.
Adhesion
After cleaning and degreasing, Sus Coating® is applied directly to the FRP substrate without primer, providing strong adhesion.
Cost-Effectiveness
By making use of the existing water tank, Sus Coating® can reduce costs compared with replacement work and help lower the maintenance burden.
Environmental Benefits
Extending the service life of existing water tanks helps reduce removal work and waste associated with replacement, contributing to a lower environmental impact.
Short Construction Period
Because the work is performed externally, no water shutdown is required. Fast-drying properties also allow a shorter construction period than tank replacement.
Reliable Test Data Supports Our Quality
Sus Coating® has undergone a range of tests for performance required in external protection, including weather resistance, adhesion, coating strength, and salt resistance.
In accelerated weathering testing, the coating and substrate remained in good protective condition after 500 hours (equivalent to 15 years of outdoor exposure).
In neutral salt spray testing, 1,440 hours of testing (equivalent to 15 years of seawater immersion) were conducted, with good ratings confirmed for rusting and blistering in general areas.
Detailed test results are available under “View Test Data” below.
Calculated for a 4m (H) x 5m (W) x 2.5m (D) 50t elevated water tank
Estimates in Japan
LONG-TERM VALUE
A valuable choice
considering the next 20 to 30 years
Sus Coating® was applied to a water tank 15 years after installation.
As of the 2025 inspection, 20 years had passed since application and the tank had been in service for 35 years.
The coating has prevented peeling and rust on support-frame bolts, contributing to long-term life extension.
CASE STUDY
Implementation Track Record
Adopted by a Wide Range of Facilities Across Japan
Commercial Facilities
Hospitals
Office Buildings
Schools
Hot Spring Facilities
Food Processing Plants
The patented “Sus Coating” technology extends
the lifespan of water storage tanks, contributing to society.
Safe Water and Sanitation for All
By reducing light entering the tank, Sus Coating® helps maintain a hygienic water storage environment.
Sustainable Cities and Communities
By extending the service life of water tanks, Sus Coating® contributes to the sustainable use and maintenance of buildings and facilities.
Responsible Production and Consumption
By making effective use of existing equipment, Sus Coating® helps reduce the use of new materials and waste generated by replacement work.
FAQ
Frequently Asked Questions
QIs a water shutdown required during application?
A
Sus Coating® is applied from the outside of the water tank, so no water shutdown is required. The tank can remain in normal use during the work.
QCan Sus Coating® be applied to a water tank that has been in service for more than 20 years?
A
Yes. Depending on the condition of the tank, we may also recommend partial repairs or internal repair methods.
QIs repainting required?
A
In principle, repainting is not necessary.
QHow much does it cost?
A
The cost varies depending on tank capacity, installation conditions, scaffolding requirements, and the degree of deterioration.
Please contact us using the form below and we will send you a Quotation Request Form. Once you complete the required information and attach photos, we can provide an estimate in approximately one week.
QCan Sus Coating® be applied anywhere in Japan?
A
Yes. The Sus Coating head office provides responsible installation services throughout Japan, maintaining consistent quality through standardized technical expertise.
QIs it possible to become a distributor?
A
We are recruiting authorized sales distributors for Sus Coating® throughout Japan. Please contact us using the form below for details.
*We are not recruiting installation contractors.
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