Nylon brush seals (Therm-L) are simply the most effective way of sealing gaps for the life of your door. Featuring 100% type-6 black nylon, Therm-L brush seals are 98.5% effective in blocking air infiltration and will not freeze or become brittle in cold weather situations (even down to 70 degrees below).
Therm-L brush seals an excellent choice for most commercial or industrial; rolling steel, sectional, mini-warehouse and other type of door that requires the most durable and effective seal possible. Install Therm-L brush seals along, headers and other door areas to reduce energy costs and avoid dirt, noise, pests and other weather elements.
Therm-L brush seals come in a variety of lengths for the best fit for your application. Constructed with thousands of flexible filaments , the nylon brush creates a solid weather tight seal against irregular surfaces and provides easy door movement. Our brush seals include a clear anodized aluminum holder and are available in standard and heavy duty models. Each model features a number of holder sizes and shapes. Holders are provided with clear anodized finish and are pre-slotted for easy installation and adjustment. Nylon brush seals are UL rated up to 4” long on 3-Hr Fire Doors (must request the UL label when ordering). Brush filaments conform to irregular surfaces giving you a firm weather tight seal while allowing unrestricted door movement. Black polypropylene brush is more cost effective but also comes in a variety of lengths for the best fit for your project. Polypropylene seals have less abrasion resistance than nylon but are more resistant to moisture absorption.
Independent laboratory testing has proven that our nylon brush will withstand up to 2,000,000 cycles (opening & closing) without degradation due to abrasion.