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





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