Weber Waterproofing Polyurethane (PU) Coating — UV-Resistant Hybrid Membrane | Pelapis Kalis Air PU Luaran

Weber Waterproofing Polyurethane (PU) Coating — UV-Resistant Hybrid Membrane | Pelapis Kalis Air PU

Pelapis-kalis-air-tahan-UV

weberdry PUD coat is a professional-grade, one-component hybrid waterproofing membrane. Engineered for maximum elasticity and UV stability, it provides a seamless protective barrier for exposed rooftops and balconies.

PRODUCT DESCRIPTION

  • weberdry PUD coat is a Polyurethane Dispersion (PUD) liquid applied membrane engineered for high-performance waterproofing in commercial and residential structures across Malaysia.
  • The Project Challenge: Main contractors and project managers in Malaysia face the constant threat of structural degradation caused by extreme thermal expansion and high humidity. Standard coatings often fail due to UV degradation or inability to bridge hairline cracks (Retak Halus) in RC slabs, leading to costly water ingress and internal damage.
  • The Technical Solution: weberdry PUD coat addresses these engineering pain points through a Polyurethane Hybrid (Campuran PU) formulation that offers >300% elongation. This allows the membrane to flex with the building’s movement while maintaining a seamless, watertight seal. Its inherent UV resistance makes it the definitive choice for exposed areas where traditional membranes would become brittle and peel.
  • Logistics & Supply: Kee Maju Jaya ensures stock consistency for large-scale developments. We provide efficient site delivery to key industrial hubs, including Kuala Lumpur, Selangor, Johor, and the East Coast, ensuring your project timeline remains uninterrupted.

Quick Specs

  • Material Grade: Polyurethane Dispersion Hybrid
  • Application: Exposed Roofs, Balconies, RC Gutters
  • Compatibility: Porous (Concrete) & Non-Porous (Metal) Substrates

KEY TECHNICAL FEATURES

  • Ultra-High Elasticity: Designed for superior crack-bridging (Tutup Retak) to accommodate structural movement.
  • UV-Stable Formulation: Specifically engineered for exposed waterproofing areas without the need for additional screed protection.
  • Low VOC & Solvent-Free: Eco-friendly composition safe for indoor-adjacent applications like balconies and terraces.
  • Single-Component Efficiency: Ready-to-use formula reduces on-site mixing errors and accelerates installation time.

APPLICATIONS & BENEFITS

  • Industrial (Factories & Warehouses): Seamless protection for large-scale RC flat roofs. Benefit: Reduces maintenance overhead and prevents industrial asset damage.
  • Coastal Areas (East Coast / Terengganu): High-build system resistant to salt-spray and high humidity. Benefit: Enhanced durability in aggressive tropical environments.
  • Residential (Condominiums/High-Rise): Ideal for balconies and podium decks. Benefit: Long-term leak prevention for high-density living spaces.
  • Infrastructure (RC Gutters & Walkways): Efficient waterproofing for complex geometries. Benefit: Industry Standard Compliant protection for government and JKR projects.

TECHNICAL SPECIFICATIONS TABLE

Specification Detail
Compliance Industry Standard Compliant
Material Composition Polyurethane Dispersion (PUD) Hybrid
Appearance Liquid Membrane (Grey/White)
Elongation at Break >300% (ASTM D412)
Tensile Strength High-Tensile Performance
Finish/Coating UV-Resistant / Tahan Karat & Cuaca
Curing Time 24–48 Hours for Full Service

 

Specification Category Technical Details
Colour Grey / White
Density 1.35kg/l @ 23°C
Shelf Life 12 months from date of production
Service Temperature Between 5°C to 40°C (improved system)
Substrate Temperature Between 5°C to 35°C
Substrate Condition No standing water/condensation on the substrate to be coated
Air Humidity Maximum 80% RH
Dew Point Surface temperature must be +3°C above the dew point
Pull-Off Adhesion Strength ≈ 1.0 N/mm² (ASTM D7234)
Elongation at Break > 400% (ASTM D412)

 

Stage Duration
1st Coat to Primer 1 – 2 hours
Over Coat Time 4 – 6 hours
Final Coat to Reinforcement 12 – 24 hours
Curing Time 48 hours

 

System Type Priming Coat 1st Coat Reinforcement Final Coat
Standard System 0.4 kg/m² (Dilute with 10% water) 0.5 kg/m² 0.5 kg/m²
Improved System 0.4 kg/m² (Dilute with 10% water) 0.5 kg/m² 0.5 kg/m² + 1 layer webertape fibermesh 100 0.5 kg/m²

 

Waterproofing-bumbung-konkrit

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FAQ SECTION

Question 1: What is the recommended waterproofing for RC flat roofs in Malaysia?

Answer 1: For exposed RC flat roofs, a UV-resistant liquid membrane like weberdry PUD coat is highly recommended. It is engineered to withstand Malaysia’s extreme thermal expansion and heavy monsoon rainfall without the seam-failure risks associated with traditional sheet membranes.

Question 2: How do you treat hairline cracks before applying PU coating?

Answer 2: All hairline cracks must be cleaned and primed. For superior structural integrity, Kee Maju Jaya recommends the “Reinforced System,” which incorporates webertape fibermesh 100 into the weberdry PUD coat layers to bridge movement areas effectively.

Question 3: Is weberdry PUD coat suitable for high-humidity coastal projects?

Answer 3: Yes. Its hybrid polyurethane dispersion formulation is specifically designed to resist blistering and moisture-related failures common in Malaysia’s East Coast and high-humidity coastal regions.

Question 4: Can this PU coating be applied on metal roofs?

Answer 4: weberdry PUD coat exhibits excellent adhesion to non-porous substrates. When the metal surface is properly cleaned and prepared, it provides a robust, rust-resistant (Tahan Karat) protective layer that extends the roof’s lifespan.

 

Soalan 1: Apakah sistem kalis air (waterproofing) terbaik untuk bumbung rata concrete (RC flat roof) di Malaysia?

Jawapan 1: Untuk bumbung terdedah, sistem cecair membran (liquid membrane) tahan UV seperti weberdry PUD coat adalah pilihan terbaik. Ia mampu menangani cuaca panas terik dan hujan lebat tanpa risiko kebocoran pada sambungan (seams) seperti yang sering berlaku pada membran jenis gulung.

Soalan 2: Bagaimana cara merawat retak halus sebelum sapuan coating PU?

Jawapan 2: Semua retak halus perlu dibersihkan dan disapu primer. Untuk ketahanan jangka panjang, Kee Maju Jaya mengesyorkan “Sistem Pengukuhan” dengan menanam webertape fibermesh 100 di antara lapisan weberdry PUD coat untuk mengukuhkan kawasan yang mengalami pergerakan struktur.

Soalan 3: Adakah weberdry PUD coat sesuai untuk projek di kawasan pantai yang lembap?

Jawapan 3: Ya. Formulasi hibrid poliuretana ini direka khas untuk tahan terhadap kelembapan tinggi dan menghalang kegagalan lapisan (blistering) yang sering berlaku di kawasan pantai seperti Pantai Timur Malaysia.

Soalan 4: Bolehkah cecair coating PU ini disapu pada bumbung zink atau metal deck?

Jawapan 4: weberdry PUD coat mempunyai daya lekatan yang sangat kuat pada permukaan bukan organik. Apabila bumbung besi dibersihkan dengan betul, ia berfungsi sebagai lapisan pelindung Tahan Karat yang efektif dan kalis air sepenuhnya.

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