How to Pick the Right Grade
- Maximum tensile strength
CPU-49-WP101I-A/B delivers the highest values at all temperatures (up to 30 N/mm² at –20 °C).
- Extreme temperature swing
Again, CPU-49-WP101I-A/B offers the best strength retention from –20 °C to 60 °C.
- High flexibility
Both CPU-184-UT50B-A/B and CPU-49-WP101I-A/B hit 720 % elongation—ideal for roofs that move.
- Tear resistance
CPU-49-WP101I-A/B tops the chart at 48 N/mm. Choose it for heavy-duty, abrasion-prone areas.
- Long-term durability
In heat, UV, alkali, and acid aging, CPU-49-WP101I-A/B shows the best retention, making it perfect for sun-exposed roofs.
Material Consumption Guide
Packaging note – One “set” = 30 kg (A component 20 kg + B component 10 kg). Always round
up to the next full set.
A. Flat surfaces (design rate = 1 mm ≈ 1.3 kg / m² per coat)
B. Vertical surfaces (design rate = 0.5 kg / m² per coat)
C. Primer / Base-coat / Top-coat (two layers each)
Design consumption:
• Primer = 0.3 kg / m² • Base-coat = 2.6 kg / m² • Top-coat = 0.6 kg / m²

* Figures exclude surface irregularities, waste, and weather-related losses. Adjust upward if the substrate is rough or highly absorbent. Actual usage varies with application method, coat thickness, and surface profile.
Recommended Reading Topics (Click to explore)
- How to Choose High-Quality Waterproofing Materials
- How CNS 8644 Helps Regulate Waterproofing Material Standards
- Detailed Requirements of CNS 8644 — Roofing & Balcony Applications
- TPUCO’s CNS 8644-Compliant Waterproof Coatings
- Professional Contractors vs. DIY — Which Should You Choose?
- Why You Need Primer, Base Coat, and Top Coat in Waterproofing
- Real-World Waterproofing Case Studies and Success Stories
This guide combines international literature, in-house test data, and field experience. Results may vary with proprietary formulas or job-site conditions.
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Fast drying polyurethane coating:
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Q27:Key Steps for High-Quality Waterproofing
https://www.taiwanpu.com/en/about/Key-Steps-for-High-Quality-Waterproofing
Q28:How to Choose High-Quality Waterproofing Materials
https://www.taiwanpu.com/en/about/How-to-Choose-High-Quality-Waterproofing-Materials
Q29:CNS 8644: Safeguarding Waterproofing Quality
https://www.taiwanpu.com/en/about/CNS-8644-Safeguarding-Waterproofing-Quality
Q30:CNS 8644 Roofing & Balcony Waterproofing Guide
https://www.taiwanpu.com/en/about/CNS-8644-Roofing-and-Balcony-Waterproofing-Guide
Q31:TPUCO’s CNS 8644-Compliant Waterproof Coatings
https://www.taiwanpu.com/en/about/TPUCO-CNS-8644-Compliant-Waterproof-Coatings
Q32:Team or DIY? Choosing the Right Waterproofing Plan
https://www.taiwanpu.com/en/about/Team-or-DIY-Choosing-the-Right-Waterproofing-Plan
Q33: Why Waterproofing Needs Primer, Mid & Topcoat?
https://www.taiwanpu.com/en/about/Why-Waterproofing-Needs-Primer-Mid-Topcoat
Q34:Waterproofing Project Case Study & Performance Showcase
https://www.taiwanpu.com/en/about/Waterproofing-Project-Case-Study-and-Performance-Showcase