What Is the Advantage of Self‑Sealing EPDM Gaskets in Spiral Duct Systems?

Traditional duct sealing with tape or mastic is messy and inconsistent. Poor seals lead to air leaks, energy waste, and costly callbacks.

Self-sealing EPDM gaskets offer fast, tool-free, airtight sealing in spiral duct systems—boosting both energy efficiency and installation speed.

Here’s why these pre-installed rubber gaskets are becoming standard in high-performance HVAC ductwork.

What is a self-sealing EPDM gasket¹?

These gaskets come factory-installed inside spiral duct fittings², designed to compress and seal automatically when joined with a mating pipe.

No extra sealant, glue, or taping is needed.

✅ Typical designs include:

• Double-lip U-gaskets
• Triple-lip compression rings
• Push-fit gaskets for round and oval duct ends

When the duct is inserted, the gasket compresses and conforms to the surface—creating an instant airtight connection³.

Key Advantages of Self-Sealing EPDM Gaskets

Let’s break it down by benefit:

1. No Mastic or Tape Required

• Saves labor time during field assembly
• Eliminates mess and cleanup
• Reduces total installation cost⁴ by 10–20% on large projects

2. Consistent Airtightness

• EPDM’s elasticity provides uniform pressure across the joint
• Helps meet EN 12237 Class D or SMACNA Class 3⁵ leakage standards
• Reduces risk of human error or seal inconsistency

3. Reusable and Repair-Friendly

• Can be disassembled and reinstalled without damaging the seal
• Great for temporary installs⁸, retrofits, or access panels
• No curing time—joints are ready immediately

4. Long-Term Durability

• EPDM resists aging, UV, ozone, and chemical exposure
• Maintains seal after thousands of compression cycles⁹
• Compatible with duct pressures up to 1000 Pa or more

Some models even come talc-coated¹⁰ for easier assembly in cold or tight spaces.

Where Self-Sealing EPDM Gaskets Are Used

These gaskets are ideal for:

• Spiral duct and fitting connections (80 mm – 1250 mm)
• Dampers and air control units
• Exhaust and ventilation outlets
• Energy-efficient HVAC systems¹¹ in hospitals, data centers, labs

Julong Rubber supplies custom-cut and standard-size EPDM gaskets for spiral duct manufacturers, HVAC installers, and OEMs across Europe.

Conclusion

Self-sealing EPDM gaskets simplify spiral duct installation and raise system performance. They’re fast, reliable, leak-resistant—and require no messy adhesives.

Need self-sealing EPDM gaskets for your duct project?
Contact Julong Rubber or Request a Quote to get high-performance spiral duct gaskets custom-sized for your fittings.

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