Can you use gasket maker instead of a gasket?

As a mechanical engineer with a focus on fluid dynamics and sealing technologies, I've worked with various sealing solutions including gaskets and RTV sealants. When it comes to the question of whether you can use a gasket maker, which I assume refers to an RTV (Room Temperature Vulcanizing) sealant, instead of a traditional gasket, there are several factors to consider.

Introduction to Gaskets and RTV Sealants
Firstly, let's define the two components:


1. Gaskets: These are typically made from materials like rubber, silicone, or other polymers and are designed to create a seal between two surfaces. They are pre-cut to fit specific applications and are often used in automotive, industrial, and plumbing applications.


2. RTV Sealants: These are one-part, silicone-based sealants that cure at room temperature to form a flexible, durable seal. They are versatile and can be used in a variety of applications where a flexible seal is required.

Comparative Analysis
Now, let's delve into the comparison:


1. Material and Flexibility: Gaskets are made from a specific material chosen for its sealing properties and are rigid until installed. RTV sealants, on the other hand, are liquid when applied and cure to a flexible rubber-like state. This flexibility can be advantageous in applications where there is movement or vibration.


2. Installation: Gaskets require precise cutting and fitting to ensure a proper seal. RTV sealants can be applied in a bead and spread to fill gaps, which can be easier in some cases, especially if the mating surfaces are irregular.


3. Temperature and Chemical Resistance: Both gaskets and RTV sealants can be formulated to withstand a range of temperatures and chemicals. However, the specific formulation of the RTV sealant must match the application requirements closely to ensure longevity and performance.


4. Durability and Maintenance: Gaskets may need to be replaced periodically due to wear and tear or if they become damaged. RTV sealants, once cured, can provide a long-lasting seal that may not require replacement.


5. Cost: The cost can vary depending on the specific materials and applications. RTV sealants might offer a cost-effective solution in certain scenarios, especially for one-off or irregularly shaped applications.

Applications
It's important to note that while RTV sealants can be used in many applications traditionally served by gaskets, they are not universally interchangeable. Here are some considerations:

- Automotive Applications: RTV sealants are commonly used in automotive applications for their flexibility and ability to seal irregular surfaces. However, they should not be used in high-pressure applications where a rigid gasket is required.

- Plumbing: In plumbing, RTV sealants can be used to seal joints and connections, but they are not suitable for high-pressure systems that require a robust gasket.

- Industrial Equipment: For industrial applications, the choice between a gasket and RTV sealant will depend on the specific requirements of the equipment, such as pressure, temperature, and chemical exposure.

Conclusion
In conclusion, while RTV sealants can be a viable alternative to traditional gaskets in certain applications, they should not be considered a one-size-fits-all solution. It is crucial to match the properties of the RTV sealant to the specific requirements of the application to ensure a reliable and effective seal. Always consult with a sealing expert or refer to the manufacturer's recommendations when choosing between a gasket and an RTV sealant.

It should not be used as a replacement for the gasket, though. It is fine to use the correct RTV sealant instead of a gasket if used in the right application (oil, high temp, fuel). ... RTV sealant is better than primitive gaskets in most applications ie.Sep 14, 2014