For manufacturers and industry professionals, precision and reliability are paramount. Every component, every seal, plays a critical role in the overall performance and longevity of machinery and products. When it comes to sealing solutions, liquid gasket makers offer significant advantages, but a common misconception persists: if a little is good, more must be better. This is a myth that can lead to significant problems, costing time, money, and potentially compromising operational integrity.

In this blog, we’ll delve into why “too much gasket maker” is a real concern, the potential consequences, and offer practical insights to ensure optimal application for maximum sealing effectiveness.

The Science of Sealing: How Gasket Makers Work

To understand why excess is detrimental, it’s essential to briefly revisit how liquid gasket makers function. Unlike pre-cut, solid gaskets, liquid gasket makers (often referred to as RTV silicones, anaerobic sealants, or curable elastomers) work by filling microscopic imperfections and irregularities between mating surfaces. When cured, they form a durable, conformable seal that prevents leaks of fluids and gases. Their effectiveness hinges on achieving a consistent, thin film that can properly cure and adhere to the substrate.

The Hidden Dangers of Over-Application

Applying too much gasket maker can trigger a cascade of issues, each with its own set of undesirable consequences:

1. Squeeze-Out and Contamination: This is arguably the most common and immediate problem. When excessive gasket maker is applied, it will inevitably “squeeze out” from the joint as components are assembled and torqued down. This excess material can migrate into critical internal passages, fluid galleries, or delicate mechanisms.
   • Examples:
     • In an engine, squeezed-out silicone can break off and clog oil pick-up screens, leading to oil starvation and catastrophic engine failure.
     • In hydraulic systems, excess sealant can contaminate sensitive valves or restrict fluid flow, impairing performance and potentially causing system damage.
     • In pneumatic systems, it can block small orifices or foul filters, leading to reduced efficiency or complete system malfunction.
2. Impaired Curing and Seal Integrity: Gasket makers cure through various mechanisms, often involving exposure to air, moisture, or the absence of air (anaerobic). A thick bead of sealant can impede the proper curing process, especially for products that cure from the outside in.
   • Consequences: The inner portion of a thick bead may remain uncured or “gummy,” leading to a weak, compromised seal that is prone to leaks under pressure or vibration. This can result in premature seal failure and the need for costly reworks.
3. Reduced Clamping Force and Joint Relaxation: A thick, soft layer of uncured or poorly cured gasket maker can act like a compressible cushion between mating surfaces. This can reduce the effective clamping force of fasteners, leading to joint relaxation over time.
   • Impact: Bolts may loosen, allowing for movement between components, which can accelerate wear, induce vibration, and ultimately lead to seal failure or structural fatigue.
4. Difficulty in Disassembly and Residue Buildup: While the aim is a lasting seal, there are times when disassembly is necessary for maintenance or repair. Excessive gasket maker makes this process significantly more challenging and time-consuming.
   • Problem: The thick, cured material is harder to remove, often requiring aggressive scraping and cleaning, which can damage mating surfaces. Residual material can also interfere with the proper seating of new gaskets or sealants during reassembly.

The “Goldilocks” Principle: Just the Right Amount

The key to successful gasket maker application lies in finding the “just right” amount – enough to fill the microscopic voids but not so much that it causes squeeze-out or curing issues.

Here’s actionable advice for professionals:

• Follow Manufacturer’s Instructions Diligently: This cannot be stressed enough. Every gasket maker product has specific application guidelines regarding bead size, surface preparation, and cure times. Adhering to these instructions is the single most important step.
• Surface Preparation is Paramount: Even the best gasket maker will fail if applied to dirty, greasy, or improperly prepared surfaces. Ensure all mating surfaces are thoroughly cleaned, degreased, and dry before application.
• Aim for a Consistent, Thin Bead: Generally, a bead size of 1/16 to 1/8 inch (1.5 to 3 mm) is sufficient for most applications. Apply the bead continuously around the perimeter of one mating surface, encircling all bolt holes.
• Consider Automation for High-Volume Production: For large-scale manufacturing, automated dispensing systems can ensure precise and consistent application, eliminating the variability of manual processes.
• Train Your Team: Invest in proper training for your technicians and assembly line workers on the correct application techniques for various sealing products. Understanding the “why” behind proper application fosters better adherence to best practices.

How Incure Can Help You Achieve Sealing Excellence

At Incure, we understand the critical role that reliable sealing plays in the success of your projects. While this blog highlights the pitfalls of over-application, our expertise extends to providing comprehensive solutions that optimize your sealing processes from start to finish.

We can assist individuals and professionals with their projects by:

• Providing Expert Consultation: Our team of material science and sealing specialists can help you select the most appropriate gasket maker for your specific application, considering factors like material compatibility, temperature ranges, pressure requirements, and chemical resistance. This guidance prevents costly trial-and-error.
• Offering Tailored Product Recommendations: We stock a wide range of high-performance gasket makers, each designed for specific industrial challenges. We’ll help you identify products that offer optimal cure characteristics and application properties to minimize the risk of over-application issues.
• Supplying Precision Dispensing Equipment: To ensure accurate and consistent application, Incure provides access to a range of dispensing equipment, from manual applicators to advanced automated systems. This tooling empowers you to control bead size and placement with precision, eliminating waste and improving reliability.
• Sharing Best Practice Resources: Through webinars, technical guides, and ongoing support, we equip your team with the knowledge to implement best practices in surface preparation, application techniques, and quality control for sealing operations.

Conclusion

In the world of manufacturing and industrial applications, more is not always better, especially when it comes to gasket makers. Understanding the potential pitfalls of over-application and implementing precise, controlled methods are crucial for achieving durable, leak-free seals. By focusing on quality over quantity in sealant application, you can safeguard your equipment, enhance product reliability, and ultimately reduce operational costs.

Partner with Incure to optimize your sealing processes and ensure your projects benefit from the precision and reliability they deserve. Contact us today to discuss your specific needs and discover how our expertise can support your success.