Deansteel UL Certified Screw-On Perimeter Bulb Seal - Fire & Positive Pressure Rated Commercial Door Frame Weatherstripping

Compliance First - Don’t Risk a Non-Certified Seal on a Rated Opening

If you’re sealing a fire-rated commercial door opening, the perimeter seal isn’t a “nice-to-have” - it’s part of the opening’s life-safety performance. Too many perimeter seals on the market are not certified, not tested to the standards inspectors look for, and can put the entire opening at risk of non-compliance.

The Deansteel UL Certified Screw-On Perimeter Bulb Seal is built for spec-driven projects where documentation matters. Designed for commercial door frames, it delivers a tight, durable seal while supporting compliance requirements demanded on rated openings.

Don’t get caught installing a perimeter seal that isn’t certified. When the job requires code compliance, documentation, and proven performance, Deansteel is the safe choice.

UL Certified Fire & Positive Pressure Performance

This product is CERTIFIED by UL to both fire-test and positive pressure standards for application to rated openings:

• Fire Door Certification: CERTIFIED by UL to CAN/ULC-S104 and ANSI/UL10B; complies with NFPA 80 and NFPA 252 for application to Hollow Metal fire doors rated up to 3 hours and Wood fire doors rated up to 90 minutes.
• Positive Pressure Certification: CERTIFIED by UL to ANSI/UL10C; complies with IBC, NFPA 80, and NFPA 252 for application to Hollow Metal fire doors rated up to 3 hours and Wood fire doors rated up to 90 minutes.

Air Infiltration Tested to ASTM E283 (Standard Test Method for Determining Rate of Air Leakage Through Exterior Windows, Curtain Walls, and Doors) to support draft-control performance expectations in commercial openings.

ANSI Certified & IBC Compliant - Built for Commercial Specs

Deansteel focuses on compliance-driven performance - not being the cheapest option. This product supports ANSI (American National Standards Institute) certified and IBC compliant project requirements, helping you meet code expectations while delivering a professional, long-lasting seal.

Commercial-Grade Construction & Materials

• Holder Material: Aluminum Alloy 6063, T5 Temper
• Bulb Material: Thermo-Plastic Vulcanizate (TPV)
• Finish:Mill Aluminum
• Vinyl Color:Black
• Flame-Resistant and Moisture-Resistant
• Temperature Range:-40°F to 250°F
• Fasteners Included: #6 x 3/4" Stainless Steel Sheet Metal Screws
• Screw Holes:Slotted for adjustment during installation
• Designed for: High-traffic commercial and institutional openings

Video Installation Guide - Watch on Desktop or Mobile

Watch the full step-by-step installation video below. This video is responsive and will scale automatically for desktop, tablet, and mobile devices.

Direct Video Link: Watch the installation video on YouTube

Installation Resources & Support

• PDF Installation Guide: Deansteel Screw-On Perimeter Seal Installation Instructions (PDF)
• Step-by-Step Installation Article: How to Install a Screw-On Bulb Seal on a Hollow Metal Frame