What Is FIPG?

  • Post last modified:February 4, 2026

What Is FIPG? A Comprehensive Guide to Form-in-Place Gaskets

In the world of modern manufacturing, precision and efficiency are the dual pillars that support successful production lines. Whether you are assembling a high-performance automotive engine, a delicate smartphone, or an industrial control box, ensuring a perfect seal against moisture, dust, and chemicals is critical. This is where FIPG, or Form-in-Place Gasket, technology comes into play. As industries move away from traditional sealing methods toward more automated and cost-effective solutions, understanding what FIPG is and how it functions has become essential for engineers and procurement specialists alike.

This comprehensive guide explores the intricacies of FIPG technology, its benefits over traditional methods, the materials involved, and the industries that rely on it for high-quality assembly. By the end of this article, you will have a clear understanding of why FIPG is a cornerstone of contemporary industrial sealing.

Understanding the Fundamentals of FIPG

FIPG stands for Form-in-Place Gasket. It refers to a process where a liquid or semi-liquid sealant is dispensed directly onto a component’s surface (usually a flange or a groove) using an automated system. Once applied, the material cures—either through exposure to air, heat, or UV light—to form a solid, elastomeric seal that conforms perfectly to the mating surface.

Unlike traditional gaskets, which are pre-cut from sheets of rubber, cork, or paper, FIPG is created “in place.” This means the gasket is custom-shaped to the specific geometry of the part at the exact moment of application. This method eliminates the need for expensive tooling and reduces the waste associated with die-cutting shapes from larger sheets of material.

The Core Components of an FIPG System

  • The Material: Usually a silicone, polyurethane, or UV-curable resin designed to provide specific sealing properties.
  • The Dispensing System: A robotic arm or CNC machine equipped with a precision valve that controls the flow and path of the sealant.
  • The Substrate: The mechanical part (metal, plastic, or glass) that requires sealing.
  • The Curing Mechanism: The environment or energy source that triggers the liquid-to-solid transformation.

How FIPG Works: The Process Breakdown

The FIPG process is highly systematic and relies on precision automation. Here is a step-by-step look at how a typical Form-in-Place Gasket is implemented on a production line:

1. Surface Preparation

Before any sealant is applied, the surface of the part must be clean and free of oils, dust, or moisture. In some high-spec applications, surfaces may undergo plasma or corona treatment to increase surface energy, ensuring maximum adhesion of the FIPG material.

2. Automated Dispensing

The heart of the FIPG process is the dispensing phase. A robotic system follows a pre-programmed path (CAD data) to lay down a consistent “bead” of material. The thickness and width of this bead are controlled by the dispensing speed, pressure, and valve size. This ensures that every part produced is identical, reducing the human error associated with manual gasket placement.

3. Assembly and Compression

There are two primary ways FIPG is used in assembly:

  • Wet Compression: The mating part is joined while the sealant is still liquid. The sealant spreads to fill every microscopic void and then cures in place, creating a “chemical bond” and a physical seal simultaneously.
  • Cure-in-Place (FIPG/CIPG): The bead is allowed to cure fully before the parts are joined. In this case, the cured bead acts like a traditional rubber gasket that is compressed when the parts are bolted together.

4. Curing

Depending on the material used, the gasket cures via moisture in the air (RTV), heat in an oven, or exposure to high-intensity UV light. UV curing is particularly popular in high-volume electronics manufacturing because it happens in seconds, allowing for immediate testing and packaging.

FIPG vs. Traditional Pre-cut Gaskets

To truly understand “What is FIPG?”, it helps to compare it to the traditional alternative: the pre-cut or die-cut gasket. While pre-cut gaskets have their place, FIPG offers several distinct advantages that make it the preferred choice for modern high-tech manufacturing.

Reduced Inventory and Overhead

With traditional gaskets, a company must stock a different SKU for every single part they manufacture. This leads to massive inventory costs and the risk of parts becoming obsolete. With FIPG, you only need to stock the raw sealant material. The same drum of silicone can be used to create thousands of different gasket shapes simply by changing the robot’s programming.

Superior Sealing Performance

Pre-cut gaskets often have “seams” or joints where the ends meet, which are potential leak points. FIPG creates a continuous, seamless bead. Furthermore, because it is applied as a liquid, it flows into the surface irregularities of the metal or plastic, providing a much tighter seal than a rigid pre-cut material could ever achieve.

Design Flexibility

Engineers are no longer limited by what a die-cutter can punch out. FIPG allows for incredibly complex, 3D gasket paths on curved surfaces. If a design change is made to the part, the gasket path can be updated in the software in minutes, rather than waiting weeks for new die-cutting tools to be manufactured.

Waste Reduction

Die-cutting gaskets from a sheet of material results in significant “scrap” or skeleton waste. FIPG is an additive process; you only use the exact amount of material required for the seal, making it a much more sustainable and cost-effective option.

Common Materials Used in FIPG

The performance of an FIPG seal depends heavily on the chemistry of the material selected. Different environments require different resistances to temperature, pressure, and chemicals.

1. Silicone (RTV)

Room Temperature Vulcanizing (RTV) silicones are the most common FIPG materials. They offer excellent temperature resistance (from -50°C to over 200°C) and are highly resistant to UV and weathering. They are frequently used in automotive engine sealing.

2. Polyurethanes

Polyurethane FIPG materials are known for their toughness and abrasion resistance. They are often used in industrial enclosures and outdoor electrical boxes where a durable, long-lasting seal is required to meet IP (Ingress Protection) ratings.

3. UV-Curable Acrylates

In the electronics industry, speed is king. UV-curable materials transform from liquid to solid in seconds when exposed to specific wavelengths of light. This allows for rapid assembly of components like cameras, sensors, and handheld devices. If you are looking for high-speed solutions, you can Contact Our Team to discuss specific UV-curable formulations.

4. Conductive FIPG

For applications requiring EMI/RFI shielding, FIPG materials can be loaded with conductive fillers like silver, nickel, or graphite. This allows the gasket to provide both an environmental seal and electrical conductivity to protect sensitive electronics from interference.

Key Advantages of Form-in-Place Gaskets

Why are so many industries switching to FIPG? The benefits extend beyond just “making a seal.”

  • Automation Friendly: FIPG is designed for robotic integration, which increases throughput and reduces labor costs.
  • High Precision: Dispensing valves can apply beads as small as 0.5mm with extreme accuracy, making them ideal for miniaturized electronics.
  • Compression Set Resistance: High-quality FIPG materials maintain their shape and “spring back” even after years of being compressed, ensuring the seal doesn’t fail over time.
  • Adhesion: Many FIPG materials act as both a seal and an adhesive, helping to structurally bond the two mating parts together.
  • Cost-Effectiveness: While the initial setup for robotics can be an investment, the per-unit cost of material and the elimination of manual labor provide a fast ROI.

Industrial Applications of FIPG Technology

The versatility of FIPG means it is found in almost every sector of modern industry. Here are some of the most prominent applications:

Automotive Industry

The automotive sector was an early adopter of FIPG. It is used extensively for sealing engine oil pans, transmission covers, water pumps, and valve covers. As the industry shifts toward Electric Vehicles (EVs), FIPG is becoming even more critical for sealing battery packs and power electronics modules against moisture ingress.

Electronics and Telecommunications

In smartphones, tablets, and wearables, space is at a premium. FIPG allows for micro-gasketing that protects internal components from water (IP67/68 ratings). It is also used in base stations and telecommunications equipment to provide weatherproofing for outdoor installations.

Medical Devices

Medical equipment often requires airtight seals that can withstand sterilization processes. FIPG materials that are biocompatible and resistant to harsh cleaning chemicals are used in diagnostic equipment and surgical tools.

Aerospace and Defense

In aerospace, gaskets must withstand extreme pressure changes and temperature fluctuations. FIPG is used for sealing fuel tanks, access panels, and electronic housing, where a failure in the seal could have catastrophic consequences.

Lighting and Appliances

LED lighting fixtures, especially those used outdoors or in industrial settings, use FIPG to prevent moisture from damaging the LEDs. Similarly, household appliances like washing machines and dishwashers use FIPG to contain water within the unit.

Best Practices for Implementing FIPG in Manufacturing

While FIPG offers many benefits, successful implementation requires careful planning. If you are considering moving to an FIPG process, keep the following factors in mind:

1. Choose the Right Dispensing Valve

Not all valves are created equal. Depending on the viscosity of your material, you may need a needle valve, a diaphragm valve, or a volumetric screw pump. Choosing the wrong valve can lead to “tailing” (where the material continues to drip after the valve closes) or inconsistent bead widths.

2. Consider the Rheology of the Material

Rheology refers to how the liquid flows. For FIPG, you usually want a “thixotropic” material—one that flows easily under pressure (during dispensing) but stays in place once it hits the surface without sagging or running.

3. Validate the Curing Time

In a high-speed production line, the curing time is the bottleneck. Ensure your curing method (UV, heat, or moisture) matches your cycle time requirements. If using moisture-cure RTV, remember that humidity levels in your factory can affect how long the gasket takes to set.

4. Quality Control and Inspection

Because the gasket is formed “live,” it is important to have inspection protocols. Many manufacturers use vision systems mounted on the robotic arm to verify the bead’s presence, path, and volume in real-time. This prevents “short shots” or gaps in the gasket that could lead to leaks.

The Future of FIPG: Innovation and Trends

As manufacturing evolves toward Industry 4.0, FIPG technology is also advancing. We are seeing the rise of “smart dispensing” systems that can adjust their parameters in real-time based on sensor feedback. Additionally, the development of more eco-friendly, solvent-free materials is helping manufacturers meet stricter environmental regulations.

Another exciting trend is the integration of 3D printing techniques with FIPG, allowing for even more complex multi-material gaskets that can provide different levels of hardness or conductivity in different areas of the same seal.

Conclusion

So, what is FIPG? It is more than just a liquid gasket; it is a sophisticated, automated sealing solution that solves many of the headaches associated with traditional manufacturing. By offering superior sealing performance, reducing waste, and providing unmatched design flexibility, FIPG has become an indispensable tool in the production of everything from cars to computers.

Choosing the right FIPG solution requires a deep understanding of material science, dispensing technology, and the specific needs of your application. Whether you are looking to improve the water resistance of a new consumer electronic device or streamline an automotive assembly line, FIPG provides a reliable, scalable, and cost-effective path forward.

If you are ready to explore how Form-in-Place Gaskets can optimize your production process or if you need assistance selecting the right high-performance adhesive for your project, our experts are here to help.

For expert guidance on selecting the right materials and dispensing systems for your specific application, Contact Our Team today to discuss your requirements and find the perfect sealing solution for your needs.

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