Since 1964
Pres-Seal Sealant
Providing sealing solutions to the marine, power supply, and industrial filtration industries for over 50 years
Non-Corrosive & Non-Oxidizing
Economical
Non-Toxic
Self – Extinguishing
Comes In 1/2″ and 1/4″ Sizes
Heat Resistant Up To 500 Degrees Fahrenheit
Excellent Resistance to Moisture, Dust, and Air
Excellent Adhesion To Metal And Wood
What is Pres-Seal?
Pres-Seal Fire Resistant Mastic Sealant was originally formulated to meet the demanding requirements of U.S. Navy specification MIL S-173770, which requires exceptional high-temperature service range and self-extinguishing properties. Our fire resistant mastic sealant has protected critical applications for over 50 years!
Designed for fast and economical installation, this professional-grade fire resistant mastic sealant features natural adhesive properties and comes on convenient release paper. Simply press it to your surface and remove the paper – providing reliable protection in seconds.
Where Do I Apply It?
Pres-Seal is ideal for metal and wood surfaces, but also adheres to ceramic, glass, and plastic surfaces. Pres-Seal has commonly been used to seal boiler doors, access openings, case and duct systems, cyclone doors, pulverizer doors, heat exchangers, flanges, or anywhere there are potential leaks of moisture, dust, and air. Pres-Seal is also used heavily in power generation facilities and industrial filtration.
Applying Pres-Seal Is Easy
Apply Pres-Seal by hand or putty knife to clean surfaces. If the application surface is distorted, warped, or damaged, simply layer multiple beads. Pres-Seal is safe to apply by hand and is non-toxic. It won’t harden over time and it is extremely pliable. Pres-Seal is also easy to cut; just measure and cut to length for your project needs and coil the remainder for future use. Please contact us for technical and safety information.
Product Sheet Downloads

