Built for Altitude: Why Engineers Trust LGS for Aerospace Sealing Materials

Sealing and insulation materials may be behind the scenes, but they’re critical to how aerospace systems handle heat, vibration, and pressure. Whether you’re sealing a fuselage panel or insulating a satellite payload, your material choices must meet strict performance, safety, and compliance standards.

At LGS Technologies, we specialize in helping engineers convert raw, spec-grade materials into custom components that perform in even the harshest aerospace environments.

As The Home of Customization for aerospace sealing and insulation, we’re here to break down two trusted materials—BISCO® silicone and PORON® polyurethane—to help you match the right material to the right application.

Why Material Selection Matters in Aerospace

Every aerospace system is a balancing act of temperature, vibration, pressure, and safety.

Selecting the wrong material can lead to seal failure, outgassing issues, or non-compliance with industry standards.

Common design challenges that we see are:

• Flame, smoke, and toxicity compliance (e.g., FAR 25.853)
• Temperature extremes reaching 200°C or more
• Constant vibration and shock, especially during launch and flight
• Low outgassing requirements for spacecraft and satellites (ASTM E595)
• Weight limitations that require lighter, more compact materials
• Exposure to UV, chemicals, and pressure cycling over time

The earlier engineers align on the right material and converting partner, the smoother the path to performance and compliance.

BISCO Silicone: Built for Harsh, High-Stakes Environments

Material Type: Silicone foam and solid
Temperature Resistance: Up to 200°C (392°F)
Certifications: FAR 25.853, ASTM E595 (select grades)
Strengths: Flame resistance, vibration isolation, compression set resistance, environmental durability

Common applications:

• Door and window seals in fuselage structures
• Gasketing and isolation pads for panels and airframes
• Thermal and acoustic insulation for ECS ducting
• Fire-blocking layers in seating systems and crew modules
• Shock and vibration pads for avionics and electronics
• Payload damping and insulation in rockets and satellites

BISCO silicones are trusted in aerospace applications where flame resistance, extreme durability, and long-term performance under pressure are required.

PORON Polyurethane: Lightweight, Cushioned, and Cabin-Ready

Material Type: Microcellular polyurethane foam
Temperature Resistance: Up to 90°C (194°F)
Certifications: Select grades meet FAR 25.853
Strengths: Excellent compression set resistance, energy absorption, and lightweight

Common applications:

• Support layers beneath aircraft seat cushions
• Padding for tray tables, armrests, and interior panels
• Anti-rattle seals for bins, panels, and compartments
• Display and touchscreen gaskets
• Filter frame gaskets in HVAC/ECS systems
• Packaging and shock pads for sensitive electronics

PORON polyurethanes are ideal for comfort, interior gasketing, and low-impact environments where excellent compression set and repeatable performance matter.

Why Engineers Choose LGS Technologies

At LGS Technologies, customization is standard. For more than 70 years, we’ve supported aerospace and defense engineers by transforming high-performance materials into press-ready components tailored to exact application needs.

As The Home of Customization, LGS offers:

• Precision converting including die-cutting, slitting, skiving, and multi-layer lamination
• Clean part presentation with tight tolerances and repeatable quality
• A centralized U.S. location with a deep inventory of aerospace-grade materials
• Responsive support and collaboration to meet tight deadlines and evolving specs

We are certified to AS9100D and ISO 9001:2015, ensuring full traceability, process control, and rigorous quality standards for aerospace and defense manufacturing.

LGS is also a Rogers Preferred Converter, with deep expertise working with BISCO, PORON, DeWAL®, and other high-performance materials commonly used in aircraft and space systems.

Quick Material Comparison

Application	Recommended Material
Exterior sealing and weather protection	BISCO Silicone
Cabin comfort and interior padding	BISCO Silicone
Vibration isolation in airframes	PORON Polyurethane
Display and touchscreen gaskets	PORON Polyurethane
ECS (Environmental Control System) duct insulation	BISCO Silicone
Anti-rattle gasketing	PORON Polyurethane
Thermal interface pads for avionics	ARLON Silicone

 

Let’s Build Something Custom

If you’re designing for aerospace, there’s no room for one-size-fits-all. That’s why LGS Technologies is proud to be The Home of Customization—helping engineers meet demanding specs with reliable, converted materials and responsive support.

Have a drawing or project in mind?
Let’s talk about how we can help. Contact LGS Technologies to explore custom aerospace solutions that are ready to fly.