Since 1964
High-Temperature Boiler & Duct Sealant
Pres-Seal is a pliable, fire-resistant mastic sealant engineered for sealing boilers, ducts, flanges, and high-heat systems. Trusted in power plants, marine vessels, and industrial filtration systems worldwide.
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Why Pres-Seal?
🔥 Heat Resistant
Rated up to 500°F, perfect for boiler doors, flanges, and high-temperature ductwork.
💧 Moisture & Dust Barrier
Seals against air, dust, and water — even on warped or uneven surfaces.
🧤 Safe & Easy to Apply
Non-toxic, hand-applied, and extremely pliable — no curing or mixing required.
♻️ Reusable & Layerable
Won’t harden over time. Easily cut to length and layered to seal complex shapes.
🧯 Self-Extinguishing Properties
This specialized duct seal enhances safety in high-risk applications where fire resistance is critical.
Industrial Applications
🛠️ Boiler Sealant
Designed for access doors and boiler cases in industrial and marine boiler systems.
🌬️ Duct Sealant
Used in HVAC and ventilation systems to seal duct flanges, access panels, and gaps.
🏗️ Equipment Gasketing
Ideal for sealing flanges, filter housings, and equipment doors in harsh environments.
🚛 Heavy Machinery & Power
Trusted by OEMs and Tier 1 suppliers in power generation, rail, and mining equipment.