About Our Products

The Almost Airtight Nylon Brush Seal is far superior to any other weatherstripping on the market.

Did you know?

Air Filtration for 3.0′ x 7.0′ Door – 1/8″ Gap Around Door Equals 30 sq. inches or 5-1/2″ x 5-1/2″ Opening

It may be surprising to realize that each outside entrance door represents at least a 5-1/2″ x 5-1/2″ (30 sq. in.) opening in your building. This is a linear crack of only 1/8″ around the door perimeter of 20 ft. (with just 1/4″ crack, the hole in your building is almost the size of a standard 8-1/2 x 11 sheet of paper!). Multiply this by the number of doors in your building and it is easy to see where a great deal of heating energy is being wasted.

According to accredited test data (ASHRAE), each door costs you from $45.00 to $100.00 per year in heat loss alone, not to mention air conditioning at twice the cost, dust, bugs, noise, and general discomfort.


The only weatherstripping you will ever need…

The Almost Airtight Brush Seal is a nylon-bristled brush permanently locked into a galvanized steel backing, which in turn is inserted into a rigid aluminum channel of varying design. This entire assembly is then mounted to cover a gap providing an almost airtight seal (98%).

Why Nylon Bristles?

The finer diameter nylon bristles used in Almost Airtight’s Brush Seal (thousands per foot) are nestled tightly together to impede the passage of hot or cold air, light, dirt, sand, dust, insects, and small rodents. The unsurpassed flexibility, recovery, and abrasive resistance properties of Almost Airtight’s Brush Seal produce a weather seal that can flex back and forth easily and will always return to its original sealed position.

The Almost Airtight Nylon Brush Seal is far superior to any other weather stripping on the market and complies with UL 10B requirements (smoke seal for fire doors with up to a 3-hour rating). It can cover a gap from 1/8” up to 6”, providing an almost airtight seal (98%-99%) that will control or eliminate energy loss (heating and cooling) and keep out the elements, such as air, light, dirt, dust, sand, insects, and small rodents, etc…

Almost Airtight Brush Seals are virtually indestructible with a broad range of applications. Almost Airtight can’t be pulled out, nor will it wear out. It returns to its original shape and is able to resist temperatures from 100 degrees below zero to 350 degrees above zero. It is non-toxic and resists most solvents.

Test Data

Single Acting Door: Air infiltration tests were conducted in accordance with ANSI SPEC.ASTME 283-73 for weather stripping, using an incline manometer connected to a static pressure tap in a sealed plenum chamber. Tests were conducted at pressures equivalent to wind velocities of 15, 25, and 35 M.P H. The Brush Seals were then removed and identical tests conducted without them.

The right fit every time

Almost Airtight’s Nylon Brush Seal easily conforms to the most irregular surface, filling pits and gaps, yet does not inhibit the door’s function. No other vinyl, rubber, or neoprene weather stripping can match this thoroughness or resistance to wear.

Nothing seals as completely or permanently as Almost Airtight Nylon Brush Seals for energy conservation or non-chemical pest control!

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Almost Airtight

6746 Dandison Blvd.
Orchard Lake, Michigan 48324