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WHEN ROOF GUTTER WATERPROOFING GONE WRONG
20.06.2025 | Waterproofing Solutions

A commercial building in Kepong, Selangor.

 

Water leakage is one of the most disruptive and costly issues in building maintenance. At this building, what started as a small issue quickly escalated into major disruptions to daily operations—affecting both business continuity and safety.

 

A Leaking Roof Gutter That Disrupted Business.

Visible damage from poor waterproofing at gutter area.

 

The root of the problem? A failed waterproofing system at the flat roof gutter.

Despite previous attempts to address the leakage, the problem persisted. The building owner turned to Nippon Paint for a long-term, reliable waterproofing solution—and what we uncovered during our inspection told a familiar story

 

What Caused the Failure? Here’s What We Found.

“We often see this,” says Vincent Ho, Manager in Waterproofing Division, Nippon Paint. “The waterproofing had peeled off, was poorly bonded, and in some areas, completely washed away. The main causes were improper surface preparation, incomplete waterproofing systems, and a lack of reinforcement at critical areas like angle fillets and pipe outlets. Sometimes, building owners even try DIY fixes, which just don’t last.”

In this case, water was seeping from the flat roof gutter all the way to the ground floor, creating not just visual damage, but serious operational challenges. What the building needed wasn’t another patch-up job—it needed a complete, professionally designed waterproofing system.

 

Application of NippoSEAL FLEX 200 at the gutter area.

 

Application of Nippon Paint LM MAT 225 as fibre reinforcement for added strength.

 

Not All Waterproofing Systems Are Equal.

Nippon Paint proposed a 5-layer waterproofing system, tailored for long-term performance in harsh weather conditions. The solution featured NippoSEAL FLEX 200, a highly flexible waterproofing membrane with 700% elongation, reinforced with Nippon Paint LM MAT for thickness and strength. The membrane was specifically selected for its ability to bridge hairline cracks and withstand extreme movement and weather exposure.

 

5-layer waterproofing system.

 

Layer System Function
1 NippoSEAL FLEX 200 Primer coat to prepare and seal the surface.
2 NippoSEAL FLEX 200 First neat coat for initial waterproofing.
3 Nippon Paint LM MAT 225 Fibre reinforcement to strengthen the membrane.
4 NippoSEAL FLEX 200 Second neat coat to embed and seal the reinforcement mat.
5 NippoSEAL FLEX 200 Final neat coat for added thickness and long-term durability.

 

All works were carried out by Nippon Paint-approved applicators, ensuring correct surface preparation and expert installation. The waterproofing system is also Green Label certified and backed by laboratory test reports, giving added assurance of its performance.

 

From Frustration to Full Protection.

“With this waterproofing system, the roof gutter is now fully sealed and protected,” says Aaron Ang, Senior Manager in Waterproofing Division, Nippon Paint. “No more recurring leaks, no more disruptions—just a smooth-running business with reduced maintenance and peace of mind.”

Importantly, Nippon Paint offers warranties ranging from 5 to 10 years, depending on waterproofing system type and site conditions. This adds a layer of confidence for building owners, contractors, and consultants alike.

 

Don't Wait for the Leak to Get Worse.

Waterproofing should never be an afterthought. A well-executed waterproofing system doesn’t just fix leaks—it prevents them from happening in the first place. That’s why our approach is built around correct diagnosis, tailored solutions, certified materials, and expert application.

Whether you're dealing with leakage from flat roofs, gutters, wet areas, basements, or structural joints, Nippon Paint provides a comprehensive waterproofing systems for your buildings.

 

Facing leakage issues? Don’t wait until it gets worse. Contact Nippon Paint today for a professional, long-lasting waterproofing solution.

Customer Careline: 1-800-88-2663

E-mail: customercare@nipponpaint.com.my

Product Solutions
NippoSEAL FLEX 200

NippoSEAL FLEX 200 is an elastomeric breathable acrylic copolymer liquid apply waterproofing membrane. It is air cured to form a seamless, UV-durable, protective, waterproof and decorative membrane. It is resistant to sun, rain, wind or frost. Its microstructure keeps water out but allows water vapour to escape through it, and thus preventing the blistering issue. Product features: • Elastomeric • Crack bridging • High build • Seamless • Easy application • Breathable  • UV resistance

LM MAT 225

NIPPON PAINT LM MAT 225 is used as reinforcement with the liquid applied waterproofing membrane. The fibers is randomly oriented structure that provides maximum multi- directional tensile strength to the liquid applied waterproofing membranes while remaining high elasticity. Product Features: • Easy to apply • Superior acid resistance