Cody Casey
Permatex offers a range of sealants and gasket makers for automotive applications. The different colours of the products indicate their different strengths. Blue, for example, is a medium-strength sealant. While Permatex Ultra Blue is a silicone-based product that can offer a good seal and has good resistance to oil and coolant, it is not recommended for use in a gasoline environment. The Permatex Ultra Black RTV Silicone, on the other hand, is the company's flagship product and is best used for any application that comes in contact with engine oil. It is also good for bonding two types of metal together.
| Characteristics | Values |
|---|---|
| Use case | Sealing a gas gauge-sending unit to a gas tank |
| Material | Silicone-based |
| Resistance | Good resistance to oil and coolant |
| Use with gasoline | Not recommended |
| Strength | Medium strength |
| Temperature range | 65ºF to 500ºF (-54°C to 260°C) |
| Colour | Blue |
| Cure time | Requires 24 hours for a full cure |
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What You'll Learn
Permatex Ultra Blue RTV is a silicone-based product
The different colours of Permatex RTV indicate the different strengths of the products. Blue RTV is a medium-strength sealant, suitable for a range of applications but may not always be the right tool for the job.
Permatex offers a range of RTV products, each designed for specific applications. For example, the Ultra Synthetic RTV is formulated to resist breaking down when exposed to synthetic engine oils. The Specialty RTVs offered by Permatex include Automatic Transmission, Gear Oil, Water Pump, and Ultra Synthetic.
When choosing the correct Permatex RTV for a transmission pan, it is important to consider the type of gasket being used. In some cases, a gasket may not be necessary, and the RTV can be applied directly to the transmission pan. However, it is recommended to follow the vehicle manufacturer's instructions and use the recommended sealant for the specific application.
Some sources suggest that the Permatex Ultra Black RTV is a better option for transmission pans as it is designed for use with engine oils and has a higher density to handle vibrations and high tensile strength. It is important to prepare the surface properly and ensure clean bonding before applying any RTV product.
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It is not recommended for use in a gasoline environment
Permatex Ultra Blue RTV is a silicone-based product that can offer a good seal and has good resistance to oil and coolant. However, it is not recommended for use in a gasoline environment. This is because gasoline will attack the product.
Permatex offers alternative solvent-based products, such as Form-A-Gasket and MotoSeal #29132, which are designed for applications in a gasoline environment. These products are better suited for use in engines with gasoline and oil mixtures, such as 2-stroke engines.
It is important to note that the different colours of Permatex products indicate their varying strengths. Purple represents low strength, blue represents medium strength, and red represents high strength. The company offers a range of thread lockers with different sealing and locking applications, catering to both small screws and large-diameter bolts.
When it comes to transmission pans, there are varying opinions on the use of gasket sealants. While some people choose to use gasket makers without a sealant, it is often used as a solution for difficult situations, such as damaged surfaces. In the case of transmission pans, a combination of a gasket and sealant may be the best approach to prevent leaks.
For example, the Permatex Ultra Black RTV is a popular choice for transmission pans. It is known for its maximum oil resistance and flexibility, making it suitable for bonding different materials. However, standard black RTV is not recommended for engine applications.
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It is suitable for sealing a gas gauge-sending unit to a gas tank
Permatex Ultra Blue RTV is a silicone-based product that can offer a good seal and has good resistance to oil and coolant. However, it is not recommended for use in a gasoline environment. This is because the gasoline will attack the product.
Permatex offers other products that are designed for applications in a gasoline environment, such as solvent-based Form-A-Gasket products or MotoSeal #29132. The Aviation Form-A-Gasket is a non-hardening sealant that resists gasoline and can be used for sealing hoses and solid gaskets.
The different colours of Permatex products indicate their different strengths. Purple represents low strength, blue represents medium strength, and red represents high strength. Other colours also indicate different strengths for various applications.
Permatex Ultra Black is a popular product for use with oil pans and transmission pans. It is the best-selling, flagship product of Permatex and is good for bonding two types of metal together. It can flex up to ten times its original shape. It is also resistant to auto and shop fluids and vibration.
For a gas gauge-sending unit to a gas tank, it is suitable to use the solvent-based Form-A-Gasket products or MotoSeal #29132, rather than the Permatex Ultra Blue RTV.
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It offers good resistance to oil and coolant
Permatex offers a range of sealants and "form-a-gasket" products. One of these products is the Permatex Ultra Blue RTV silicone, which is a medium-strength sealant that offers good resistance to oil and coolant. However, it is not suitable for use in a gasoline environment as the gasoline will attack the product.
The Permatex Ultra Blue RTV silicone is a versatile product that can be used for various applications. It is designed to provide a good seal and protect against oil and coolant damage. This makes it suitable for use in certain automotive applications, such as valve covers, oil pans, and water pumps.
While the Ultra Blue RTV offers good resistance to oil and coolant, there are other Permatex products that offer even higher levels of resistance. For example, the Permatex Optimum Black is specifically designed to provide maximum oil resistance while maintaining high flexibility. This makes it ideal for bonding different types of metals and sealing oil-based fluids.
Another product, the Permatex Optimum Grey, offers outstanding resistance to oils, coolant, and shop fluids. It has up to 15% more flexibility than the Ultra Grey and delivers 40% higher temperature resistance. This makes the Optimum Grey one of the most versatile gasket makers available.
It is important to note that the choice of sealant depends on the specific application and the types of fluids involved. While the Ultra Blue RTV offers good resistance to oil and coolant, it may not be suitable for all applications. It is always recommended to refer to the manufacturer's guidelines and choose the appropriate product for the specific task.
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It is medium strength
Permatex offers a range of sealants and gasket makers for automotive applications. The different colours of the products indicate their different strengths. Purple is low strength, blue is medium strength, and red is high strength.
Permatex Ultra Blue RTV is a medium-strength silicone-based product that can provide a good seal and has good resistance to oil and coolant. However, it is not recommended for use in a gasoline environment as the gasoline will attack the product.
Permatex offers other products that are designed for applications involving gasoline, such as the solvent-based Form-A-Gasket products or MotoSeal #29132.
For transmission pans, Permatex recommends its Automatic Transmission RTV, which is specifically formulated for this application. This product is designed to handle the vibrations and high tensile strength required for bonding between tighter tolerances. It has a temperature range of -65ºF to 500ºF (-54°C to 260°C) and can resist auto and shop fluids and vibration.
While some sources recommend using Permatex Ultra Black for transmission pans, it is important to note that this product is designed for use with engine oil and may not be the best choice for transmission applications.
The choice between Permatex Ultra Blue and other Permatex products depends on the specific application and the strengths required. For medium-strength applications where resistance to oil and coolant is needed but not exposure to gasoline, Permatex Ultra Blue could be a suitable choice. However, for transmission pans, Permatex's Automatic Transmission RTV or other gasket makers may be more appropriate.
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Frequently asked questions
No, Ultra Blue Permatex is a silicone-based product that should not be used in a gasoline environment.
Permatex offers a variety of products that can be used on transmission pans, including Permatex Ultra Black, Permatex Automatic Transmission, and Permatex Right Stuff.
Ultra Blue Permatex is a medium-strength, silicone-based product with good resistance to oil and coolant. It should not be used in a gasoline environment as the gasoline will attack the product.
