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Rainbuster 420- Nail on Flashing Membrane

SKU# TOP420259

Regular price $7,251.43

Roll Size

9" x 75' | 120 rolls 12" x 75' | 90 rolls 18" x 75' | 60 rolls 36" x 75' | 30 rolls

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RainBuster 420 Nail-On Flashing 9" x 75' (25 mil) is a premium waterproof flashing membrane engineered for fast installation and long-term protection.

Featuring a rugged 3-layer construction with a self-sealing rubberized asphalt core, it delivers superior moisture protection for windows, doors, and wall systems in residential and commercial construction.

✔ Key Features

Nail-on installation – no peel & stick backing required
Self-sealing membrane seals around nails and fasteners
Heavy-duty 3-layer design resists job site damage
UV resistant up to 120 days
Performs in all weather conditions
Withstands high winds and structural movement
Ideal for window, door, and wall flashing

📦 Product Specifications

Product Name	RainBuster 420 Nail-On Flashing
Thickness	25 mil
Width	9 inches
Length	75 feet
Material	Rubberized asphalt core with polyethylene & polyester films
Tensile Strength	580 psi
Elongation	130%+
Service Temperature	Up to 180°F
UV Exposure	Up to 120 days

🛠 Applications

Window and door flashing systems
Sheeted and open wall construction
Residential and commercial waterproofing
Flashing for rough openings and structural joints

⚙ Installation Guidelines

Install with white (printed) side facing outward
Secure using nails or mechanical fasteners
Compatible with most construction substrates
Follow AAMA, ASTM, and local building codes

🧪 Performance & Durability

Self-seals around fasteners to prevent water intrusion
Maintains performance under high heat (up to 180°F)
Flexible and durable in changing conditions
Resistant to tearing and punctures

⚠ Limitations

Not recommended behind metal siding or roofing systems
Must be covered after 120 days of UV exposure

🛡 Warranty

Limited Lifetime Product Warranty (100 years)
30-Year System Warranty when used with RainBuster 450 Sealant

Why Choose RainBuster 420 Flashing?

Unlike traditional peel-and-stick flashing tapes, RainBuster 420 offers faster installation with nail-on application while maintaining superior waterproofing performance. Its advanced membrane technology provides long-term durability, making it a trusted choice for contractors, builders, and construction professionals.