ProGrade Architectural U404 U-Shaped Door Bottom Seal - 48" Length, For 1-3/4" Doors, Fire Rated, Dark Bronze Anodized Aluminum

The ProGrade Architectural U400 Series Door Bottom Shoe is a heavy duty commercial-grade sealing solution engineered to close the gap between the bottom of the door and the threshold. This model is supplied in a 48" length and is designed specifically for 1-3/4" thick commercial wood doors, delivering superior protection against air infiltration, water penetration, sound transmission, smoke, and debris.

Manufactured with a reinforced dark bronze anodized finish aluminum holder and a high-performance vinyl insert, the U400 Series is built to withstand high traffic commercial environments. The tight-fit U-shaped design ensures the vinyl insert remains securely in place over time, preventing pull-out, tearing, or premature failure common with light-duty door sweeps.

Engineered for Commercial Performance & Code Compliance

The ProGrade Architectural U400 Series is designed for demanding commercial applications where durability and compliance are critical. The heavy-duty vinyl creates a continuous seal against the threshold, improving energy efficiency while protecting interior spaces from drafts, moisture, pests, and airborne contaminants.

This door bottom shoe is UL10C fire rated, making it suitable for use on both fire-rated and non-fire-rated door assemblies. It is also UL certified for sound, smoke, and air infiltration control, and meets ANSI/BHMA performance standards, making it ideal for commercial buildings, schools, healthcare facilities, offices, and retail applications.

ProGrade Architectural U400 Series Features

• 48" Length (Field Trimmable for Custom Fit)
• Heavy Duty Commercial-Grade Vinyl Insert
• Dark Bronze Anodized Finish Aluminum Holder
• Reinforced Aluminum Construction for Maximum Durability
• U-Shaped Design for Secure Fit on 1-3/4" Doors
• Profile Height: 1-1/8"
• Total Height: 1-5/8"
• Profile Width: 1-3/4"
• Designed for High Traffic Commercial & Residential Applications
• Fire Rated - UL10C Certified
• UL Certified - Sound, Smoke & Air Infiltration Control
• ANSI/BHMA Certified
• Helps Block Drafts, Moisture, Pests & Debris
• Includes Mounting Hardware: #6 x 5/8" Phillips Pan Head Sheet Metal Screws (PPHSMS)

Why Choose ProGrade Architectural™

ProGrade Architectural™ products are engineered for performance, durability, and code compliance. The U400 Series Door Bottom Shoe is designed to outperform standard residential-grade products, providing a long-lasting sealing solution trusted by contractors, facility managers, and building professionals.