Brass-Seal™ System — Patent Pending
Forged
Brass
Mail Slot
Block Out The Air
The finest entrances are never an accident.
Brass-Seal™ Forged Brass
Mail Slot System
ASTM E283 — Tested by Intertek
A Material Decision
The front door is the first material decision
a visitor encounters. It should be considered accordingly.
The mail slot is one of the most visible and one of the most consequential openings in a door. The Brass-Seal™ Forged Brass Mail Slot system addresses it with the precision and material integrity the threshold deserves.
Forged Brass
Mail Slot
Brass-Seal™ — Forged Brass Mail Slot System
Brass-Seal™ System
Solid Brass.
No Compromise.
Not plated. Not cast. Forged brass throughout — a material choice made for longevity and presence. The Brass-Seal™ system is engineered to eliminate air infiltration at the mail slot opening, independently tested under ASTM E283 by Intertek, and built to the specification demands of high-end residential and commercial projects.
- Construction Solid forged brass
- Testing ASTM E283, independently verified by Intertek
- Patent Status Patent pending
- Finish Options Available on inquiry
- Application High-end residential and commercial
01
Forged Brass Construction
Solid forged brass throughout. Not plated, not cast. A material choice that communicates permanence and rewards close attention over years of use.
02
Draft Elimination
Engineered to address one of the most overlooked and one of the most persistent vulnerabilities at the entry threshold: the unsealed mail slot. BOTA closes it, definitively.
03
ASTM E283 Verified
Independently tested under ASTM E283 by Intertek. Air infiltration performance verified — not claimed. Results on file for specification purposes.
04
Architect Specified
Designed to meet the demands of high-end residential and commercial applications. Specification documentation and material samples available on request.
05
Finish Integrity
Patinated and lacquered options available. A surface that develops character rather than deteriorates — consistent with the architectural materials it accompanies.
06
Built to Last
Hardware at the threshold is subject to daily use and weather exposure. Forged brass is chosen precisely because it performs and endures where lesser materials fail.
Testing Standard
ASTM E283
The industry standard for measuring air infiltration through building components under specified pressure differentials. Applied to the full Brass-Seal™ mail slot system.
Testing Authority
Intertek
Independently tested by Intertek — one of the world's leading product testing and certification organizations. Performance results are on file for specification review.
Patent Status
Pending
The Brass-Seal™ system is patent pending. Proprietary sealing engineering developed exclusively by BOTA for this application.
Built to
Specification.
Every dimension considered. Every tolerance documented. The Brass-Seal™ system is engineered for architects and builders who require complete specification confidence before installation.
| Product | Brass-Seal™ Forged Brass Mail Slot |
| Material | Solid Forged Brass |
| Patent Status | Patent Pending Brass-Seal™ |
| Testing Standard | ASTM E283 — Air Infiltration |
| Testing Authority | Intertek |
| Finish Options | Available on inquiry |
| Application | Residential and commercial |
| Spec Documents | Available on request |
| Lead Time | Available on inquiry |
Specify With Confidence.
Specification documentation, material samples, and press assets available for architects, designers, and editors.
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