Firestop Sealants

Firestopping is used to fill the gap between one fire-rated assembly and another—most commonly for top of wall, bottom of wall and wall to wall applications. Using an approved system or EJ, firestopping can produce up to a four hour rating, and adheres to the full fire-rating that is required per building code. All firestop systems that AFI installs are approved UL systems or Engineering Judgements. 

Acoustical Sealant & Spray

Acoustical sealants are used to fill the gap between acoustically rated assemblies or penetrations—most commonly for top of wall, bottom of wall and wall to wall applications. This particular sealant is not fire rated and does not provide any form of fire safety, but is smoke resistant and makes the gaps in conjoined areas more aesthetically appealing. Acoustical Sealant & Spray also helps achieve the STC ratings required for Sound.

Firestop Penetrations

Through-penetration firestop systems are designed to restore the hourly rating of fire resistive-assemblies that have been breached due to penetration by electrical, plumbing or mechanical items. Said items are vital in modern building construction, which often times requires them to pass through fire-resistive floor or wall assemblies. To maintain the fire-resistant properties, large openings are cut through the wall or floor, and the penetrating items are installed—leaving an annular space around them. Various types of fire-resistant materials are then installed within that open space, around the penetrants, to prevent flames and hot gases from passing through.

All of AFI’s applications are per approved UL Systems and Engineering Judgements.


Thermal insulation refers to the materials, methods or processes used to reduce heat transfer. It helps maintain the temperature by preventing heat from escaping or entering an area—keeping an enclosed area, such as a building, warm or the inside of an area cold. When a space is well insulated, it is more energy and cost efficient by preserving a stable, consistent temperature. Additionally, most forms of acoustic insulations work as a buffer to absorb noise and vibrations coming from outside of the room.

Unlike heating and cooling equipment, insulation does not require maintenance, upkeep or adjustments regardless of the outside conditions. AFI offers a variety of insulation installations, including a convenient spray on method.


Fireproofing is used as a preventative measure to keep steel from reaching a weakening temperature. AFI offers cementitious, board, and intumescent fireproofing applications. Cementitious fireproofing, the faster application rate of the two, can still be left exposed, but the finish is not as polished. Board Fireproofing is a dry application form and can be left exposed. The application of intumescent fireproofing is aesthetically appealing, while still achieving the necessary, regulated fire rating.

Endothermic Applications

Endothermic applications are non-flammable, low smoke emitting and extremely flexible wrap-coverings that are used to protect key structural and electrical components from heat. When the application is exposed to high temperatures it releases chemically-bound water to reduce heat in the impacted area. Endothermic applications provide up to four hours of protection to structural steel components, up to three for electrical components and two hours for open wall membranes.