Undersill Trim 

Undersill Trim, also known as Utility Trim or Finish Trim, is used to secure the top edge of vinyl siding and other cut panels around windows, doors, and eaves. It provides a clean, professional finish while locking panels firmly in place.

Features & Benefits 

Performance

• Holds cut siding securely at the top edge
• Prevents panels from lifting in high winds
• Ensures a smooth, polished appearance at transitions

Design & Installation

• Ideal for use under windows, soffits, and along the top course of siding
• Works with a wide range of siding profiles
• Compact design for easy installation in tight spaces

Durability

• Made from tough, weather-resistant materials
• Maintains shape and strength through seasonal changes
• Low-maintenance, long-lasting trim solution