Choosing the right gasket type affects sealing reliability, cost, and production speed. This guide compares fabricated, RTV, and FIP gaskets to help professionals select the best fit for their specific application and manufacturing needs.
Fabricated Gaskets
What Are Fabricated Gaskets?
Fabricated gaskets are die-cut, waterjet-cut, or molded from sheets of rubber or elastomeric material. They’re pre-formed to match a specific size and geometry, shipped ready to install.
Where Fabricated Gaskets Excel
- Standard designs benefit from consistent parts and streamlined inventory management
- These gaskets offer flexibility in material selection, such as EPDM, silicone, or fluorosilicone
- They simplify installation during assembly without curing or processing
Challenges
They require accurate tooling. Upfront setup cost can be higher. Irregular or uneven surfaces may need thicker profiles or soft compressible foams for proper sealing.
RTV Gaskets
What Are RTV Gaskets?
RTV (Room Temperature Vulcanizing) gaskets are applied as liquid sealants that cure into rubber-like solids at ambient temperatures. They form seals directly on mating surfaces.
Where RTV Gaskets Excel
- Irregular surfaces or one-off builds benefit from RTV’s conformability
- This method suits prototype development and field-based repair
- Certain RTV formulations offer chemical or heat resistance
Challenges
RTV requires curing time that can delay production. Application consistency depends on the skill of the operator. In scaled assembly processes, this introduces variability. Excess applications can also create cleanup challenges.
FIP Gaskets
What Are FIP Gaskets?
FIP (Form-in-Place) gaskets are dispensed by precision automated equipment. They are liquid materials applied along sealing paths and cured in place.
Where FIP Gaskets Excel
- High-volume production with tight tolerances often relies on FIP
- These gaskets are ideal for compact assemblies with narrow or complex geometries
- Automation provides consistent application and reduces labor costs
Challenges
FIP systems require investment in equipment. Once cured, gaskets are not reusable. If rework is required, the part must be disassembled and resealed entirely.
More reading: Silicone O-rings vs. Rubber O-rings
Material Compatibility and Performance in Demanding Environments
Fabricated gaskets support a wide range of materials, including silicone for high temperatures, EPDM for outdoor weathering, and FKM for resistance to fuels and oils.
RTV formulations vary by application. Some are designed for fuel system compatibility while others are safe for food or medical use. However, some formulations may shrink or release volatiles during curing, which affects performance in sealed enclosures.
FIP materials such as liquid silicone rubber (LSR) or urethane can be formulated to meet electrical, thermal, or mechanical requirements. These materials are ideal for use with coated metals and engineered plastics in sealed modules.
Installation and Maintenance Considerations
Fabricated gaskets are fast to install. If a failure occurs, they are easy to remove and replace. This makes them ideal for field servicing or low-complexity assemblies.
RTV gaskets offer flexibility in shape and coverage. However, bead size, position, and curing time introduce variables. Errors in the application may lead to leakage or failure. Excess material often results in cleanup and waste.
FIP gaskets provide repeatable performance in automated production. They reduce reliance on manual skills. However, they are bonded permanently to the substrate. Disassembly requires full gasket removal and reapplication. This adds time and material cost during repair or inspection.
Regulatory and Compliance Aspects
Compliance is a requirement in many sectors. Material selection and processing must align with regulatory expectations.
Fabricated gaskets can be made from FDA 21 CFR 177.2600 approved silicone or UL 94 V-0 flame-rated materials. Documentation is typically available for audit purposes.
RTV sealants must be assessed for VOC emissions, outgassing, and biocompatibility if used in medical or electronic applications. ISO 10993 guides testing for biological compatibility.
FIP gasket systems are often evaluated under IP67/IP68 sealing standards. These products must demonstrate dimensional stability and environmental durability. OEM customers may request PPAP or AS9102 reports to support qualification.
Fabricated Gaskets vs. RTV Gaskets vs. FIP Gaskets
| Feature | Fabricated Gaskets | RTV Gaskets | FIP Gaskets |
| Best Use | High-volume standard parts | Low-volume or irregular parts | High-precision automated assembly |
| Material Flexibility | Very high | Moderate | Moderate |
| Setup Cost | Medium (tooling required) | Low | High (equipment required) |
| Ease of Application | High (manual install) | Medium (operator dependent) | High (automated) |
| Reworkability | Good | Excellent | Poor |
| Seal Uniformity | Depends on surface and cut | Variable | Very consistent |
| Regulatory Compliance | Excellent | Variable by formula | Strong when tested and documented |
Related reading: What Is EPDM Seal and Gasket?
How to Choose
FIP gaskets are suitable for high-volume programs where precision and automation are priorities. They minimize variation and reduce labor requirements.
RTV gaskets provide flexibility and fill gaps where surfaces are inconsistent or designs change frequently. They are appropriate for repair work and early-stage prototyping.
Fabricated gaskets provide speed and reliability in medium-to-high production volumes. They are easy to integrate into existing workflows without process changes.
Reliable Manufacturer and Support
Manufacturing quality gaskets requires expertise in materials, design, and compliance. Working with an experienced rubber gaskets manufacturer ensures that seals match both engineering specifications and industry standards. Support from prototype to production helps reduce risk and speed up deployment.
