In commercial roof engineering, penetrations for drainage lines and HVAC ducting represent structural vulnerabilities. Traditional sealants degrade quickly under intense UV exposure and thermal shifting. Pre-fabricated, high-elasticity flashing is essential to maintain building envelope integrity.

The YS-205 pipe flashing, manufactured under the Yombo brand, is engineered specifically for mid-to-large-scale penetrations from 1-1/2" to 4" (38.1 mm to 114.3 mm).

Material Science & Integration

The YS-205 relies on a high-performance hybrid material architecture:

TPE Sealing Collar: It retains excellent elasticity across an operating temperature range of -40°C to 120°C, resisting cracking and industrial chemical exhaust.

Galvanized Steel Base Plate: A heavy-duty 390x305mm hot-dip galvanized base plate provides robust structural support and corrosion resistance. Its ductile nature allows hand-forming on-site to match any metal profile.

Technical Specifications

• Product Model: YS-205
• Applicable Pipe Diameter: 1-1/2" to 4" (38.1 mm to 114.3 mm)
• Base Plate Size: 390 mm x 305 mm
• Compliance & MOQ: RoHS Compliant, Minimum 100 Units

Key Installation Factors

Vibration Dampening: The stepped cone acts as a bellows, absorbing mechanical shifting from rooftop equipment without breaking the seal.