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Inflatable Seals Engineered for 100% Leak-Tight Performance.

Fabric-reinforced inflatable seals delivering 100% gas-tight sealing across irregular and misaligned surfaces.

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Trusted By 100+ Industry Leaders

Inflatable Seals That
Conform. Seal. Perform.

Western Sealtech inflatable seals create leak-tight seals under controlled pressure, even on uneven surfaces. Designed to seal only when needed, they reduce stress and deliver reliable performance in demanding, high-precision applications.

Why Inflatable Seals
Outperform Standard Solutions.

Seals Uneven And Irregular Surfaces.

Compensates for wide gap tolerances that fixed gaskets cannot seal reliably.

Eliminates Compression-Set Failures.

Seals inflate only when required, avoiding permanent deformation common in static seals.

Low Actuation Force, High Sealing Integrity.

Reduces door loads, clamp forces, and mechanical stress while maintaining 100% sealing.

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Inflatable Seals for Every Application.

Inflatable seals are selected based on pressure, gap variation,
environment, and duty cycle.

Non-Reinforced Inflatable Seals

Extruded or molded elastomer seals suitable for moderate pressures and standard industrial applications where mechanical abuse is limited.

Fabric-Reinforced Inflatable Seals

Fully molded seals reinforced with Nylon, Dacron, Nomex, or Kevlar fabrics. Designed to prevent burst failure and dimensional instability in high-pressure, high-temperature, or rugged environments such as furnaces, vacuum chambers, offshore systems, and nuclear facilities.

Axial Expansion

Seals gaps between two parallel faces

Radial Inward Expansion

Seals or grips internal components

Circular / Oval

Full-perimeter sealing for doors, hatches, and cylindrical housings

U-Shaped Frames

Partial-perimeter sealing with molded corners

9 Inflatable Seal Profiles
To Match Your Application.

Smooth Fasten-in Seal

Oblong Seal

Dovetail Seal

Table Top Slot-Fit Square Seal

Stud Top-Slot Fit Square Seal

Bonded Bottom Seals

Snap-In Seals

Ribbed Dovetail Seals

Ridged Fasten-in Seals

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Every Inflatable Seal Is
Engineered, Tested And Validated.

Operating Performance

Materials & Reinforcements

Testing & Quality

Engineering Support

Operating Performance
Pressure Range
  • 0.5 to 25 bar, subject to profile and application
  • ≥ 3x burst safety factor
HL3 Grade
  • EPDM | Silicone
Non-HL3 Grade
NBRFluorosiliconeNeopreneNatural Rubber
Custom engineered compounds.
Temperature Range (Material Dependent)
  • -60°C to +200°C
Maximum Expansion Ratio
  • Up to 100% of profile height (profile dependent)

Materials & Reinforcement
Elastomers Available
EPDMSilicone (VMQ)
Compliance Options
REACHRoHSEN 45545-2 R22/23 HL3UL 94 V-0
Reinfocement Option
NylonPolyesterNomex®Kevlar®
Multi-layer reinforcement ensures controlled expansion and long cycle life.

Testing & Quality
  • 100% leak testing
  • Tight dimensional tolerances (RMA tolerances)
  • 100% cycle testing
  • Maximum pressure testing (to customer requirement)
Life cycle validation (on request)

Engineering Support
  • In-house CAD design
  • Rapid prototyping (2–3 weeks)
  • Custom mold development
  • Small to large production runs
Groove and system design

Trusted Across Critical Industries.

Rail and Mass Transit

Fire-safe profiles for doors, windows, HVAC.

Semiconductor

Heat-resistant components designed for high-pressure

Powder & Bulk Handling

Leak-proof inflatable seals for dust-tight material flow.

Actuator Valve

Heat-resistant components designed for high-pressure.

Pharmaceutical

Sterile inflatable seals & hygienic tubing solutions.

Inflatable Seals FAQs.

Explore our FAQs for quick answers to common questions.

How do I know an inflatable seal will not burst or over-expand in my application?

Inflatable seals are designed with defined inflation pressures and wall thickness based on groove geometry. We engineer seals with controlled expansion limits, optional fabric reinforcement, and validated pressure ranges to prevent over-inflation failures even under repeated cycling .

What groove design is required for reliable inflatable seal performance?
Groove depth, width, corner radius, and venting are critical. Incorrect grooves cause uneven expansion, premature wear, or leakage. We review customer drawings and recommend groove geometry that ensures uniform inflation, controlled compression, and long seal life.
How many inflation–deflation cycles can the seal realistically handle?
Cycle life depends on material, reinforcement, inflation pressure, and operating environment. Our inflatable seals are designed for high-cycle applications and are validated for hundreds of thousands to millions of cycles in automation, doors, and vacuum systems when operated within design limit .
Will the seal compensate for uneven, warped, or misaligned mating surfaces?
Yes. One of the main reasons OEMs use inflatable seals is their ability to conform to surface irregularities. Inflatable seals expand uniformly and can seal variable gaps that conventional gaskets cannot handle reliably.
What happens if the air supply fails during operation?
Inflatable seals can be designed as normally-deflated or normally-inflated depending on safety requirements. For critical systems, we recommend fail-safe configurations, pressure monitoring, and controlled deflation logic to avoid operational or safety risks.
How do I select the correct material for temperature, media, and environment?
Material selection is application-specific. EPDM is used for steam, weather, and fire-safe rail applications; Silicone for temperature extremes and hygiene; FKM for oils, fuels, and chemicals. We assist in selecting materials based on temperature range, chemical exposure, fire norms, and hygiene requirements.
How does an inflatable seal compare to a mechanical clamping or fixed gasket solution?

Inflatable seals reduce mechanical wear, eliminate over-compression, and allow sealing only when required. This improves equipment life, reduces door or clamp forces, and minimizes maintenance compared to rigid gaskets or mechanical clamping systems.

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