Precision Architectural Hardware
BOTA
Begins
With The
Hardware.
The finest entrances are never an accident. Every component has consequence. BOTA engineers the one most often overlooked.
Block Out The Air
Precision Architectural Hardware
The mail slot is no longer
the door's weakest point.
BOTA addresses the most consequential opening in the front door with two distinct solutions: a forged brass mail slot designed for both sides of the door, and an interior insulator engineered to enhance performance from within. Both are built to the same standard: precise, permanent, and considered.
“Independently tested to ASTM E283 at 75 Pa (~25 mph of wind) — among the first mail slot systems to carry this verification.”
Intertek / ASTM E283 Testing
Brass-Seal™ / Exterior Forged Brass Mail Slot
Brass-Seal™ System
Forged to Set
the Benchmark.
Not plated. Not cast. Forged brass throughout. A material choice made for longevity and presence. Whether specified as an exterior unit, an interior unit, or a complete paired system, the Brass-Seal™ system is engineered so each configuration independently seals the mail slot opening as if it were never there. No combination is a compromise. Independently tested and proven to seal out drafts, and built to the specification demands of residential and commercial projects.
- ConstructionSolid forged brass
- TestingIndependently verified
- Patent StatusPatent pending Brass-Seal™
- FinishSatin Brass, Satin Nickel, Satin Black
- PerformanceProven to seal out drafts, sound reduction
- ApplicationResidential and commercial
Exterior precision.
Interior performance.
The Brass-Seal™ system addresses the entry from the outside. The BOTA Mail Slot Insulator addresses it from within. Each stands alone. Two solutions. One opening. Nothing left unaddressed.
Slot
Insulator
BOTA Mail Slot Insulator / London Design Awards Gold 2024
Mail Slot Insulator
Interior.
Discreet.
Immediate.
The BOTA Mail Slot Insulator works from within. A precision-engineered interior solution that reduces air infiltration, dampens sound transmission, and finishes the interior opening cleanly. First in category to expand horizontally and vertically, it accommodates virtually all existing mail slot cutout sizes. No tools required.
- PatentsTwo granted utility patents
- InstallationTool-free, adjustable fit
- PerformanceAir infiltration reduction, sound reduction
- RecognitionLondon Design Awards, Gold 2024
- CompatibilityDesigned as a retrofit solution, the Mail Slot Insulator can be paired with the Exterior Forged Brass Mail Slot or used independently where an existing exterior slot is to remain. Properties of historic origin or clients who wish to retain an existing exterior mail slot can add the Insulator without replacement.
Recognition
London Design Awards
Gold 2024
The BOTA Mail Slot Insulator was awarded Gold at the London Design Awards 2024, recognized for innovation, precision engineering, and material excellence at the residential entry threshold.
01
Air Infiltration
Traditional mail slots rely on thin metal flaps and gravity to close. The gap they leave is felt immediately, across every season. BOTA closes it with engineering.
02
Sound Transmission
An unsealed mail slot opening passes sound through the full thickness of the door. The BOTA Forged Brass Mail Slot and Mail Slot Insulator's flap dampens transmission at the source.
03
Material Integrity
The front door is one of the most touched features of the home. While lesser materials deteriorate, forged brass is built to endure.
Find Your Product
Product SelectorAnswer a few questions. We'll match you to the right solution for your door.
Step 1
Do you have a mail slot in your door?
This determines whether you need a retrofit or a full system.
Step 2
What's your goal?
Step 3
What size is your existing slot?
Step 4
Which solution fits your needs?
The Mail Slot Insulator is a tool-free retrofit. The Brass-Seal™ system replaces the existing slot with forged brass, independently tested to ASTM E283.
Step 3
Would you also like to upgrade the exterior slot?
The Mail Slot Insulator protects mail carriers on its own. Pairing it with Brass-Seal™ adds a forged brass exterior upgrade.
Step 4
What size is your existing slot?
Step 4
What size mail do you receive?
Step 3
Which solution fits your needs?
Both options preserve the existing exterior slot. No facade alterations.
Step 4
What size is your existing slot?
Step 4
What size mail do you receive?
Step 5
Measure your door cutout
The rectangular opening in the door face — width × height in inches. The exterior slot remains unchanged.
Step 2
What size mail do you receive?
Step 3
What size mail do you receive?
Measurement
Measure your existing slot opening
Interior face — the rectangular cutout inside your door. Width × height in inches.
Measurement
Measure your door cutout
The rectangular opening in the door face — width × height in inches.
Final Step
Which finish matches your door hardware?
All finishes are PVD coated. No price difference between finishes.
Final Step
Which finish matches your door hardware?
All finishes are PVD coated. No price difference between finishes.
Your recommendation
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The Standard Was Set Here.
Two products. One standard of precision. Specification documentation, press assets, and material samples available for architects, designers, and editors.
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