The right stuff is very dense silicone and doesnt flow well. But probably is the most common go to. Ive used it to seal roof repairs on some campers. Depending on the material. But i guess it works when used. No comebacks The secret to a long served no leak gasket maker seal is surface preparation. Acetone, denatured alcohol or the stuff in your medicine cabinet will even work or a wax and grease remover all of witch wipe on wet then using another rag wipe off wet.
Meaniing dont let it dry before its wiped over with a clean rag. If nothing else soap and water rinse well and a degreaser like windex that wont residue. Also there are 2 more common anaerobic gasket sealers. One is flexible the other more rigid and used widley for metal flanges anaerobic sealers have a reactive property to metal which helps the curing process in a no air environment and they are resistant to solvents and just about everything else.
Ignore colors--check specs online before you shop. Colors change by brand. Specs other than temperature rating:. RTV for transmissions will be perfectly fine for your water pump. I just buy high-temp and use it for everything no RTV for gasoline.
I personally dislike any gasket maker that cannot be torqued immediately. I can tolerate torquing and waiting for a cure, but I really don't want to have to go back for a second, final torque.
One thing about RTV sealers, they have to cure before putting them back in service. If you want to assemble and use immediately, consider anaerobic sealer, or Right Stuff. See what the difference is below. I want to clarify some misconceptions I'm seeing about RTV silicon and anaerobic products. This is important because they are not interchangeable in all situations.
First of all, anaerobic means it cures "without air" specifically, oxygen , not "without moisture". This method of curing has several implications. Anaerobic products demand tight fitting, machined surfaces to seal off oxygen when tightly torqued. They will not seal gaps or voids, and will not seal loose fitting stamped out parts. And they don't require re-torque. They are the perfect choice when you need to get your assembly in use quickly. Second, RTV silicon products cure by exposure to moisture , not lack of moisture.
One advantage of RTVs is their ability to bridge gaps between less-than-perfect mating surfaces. The drawback is that they can require up to 24 hours to cure before putting assemblies into service. If you want the best of both worlds, Right Stuff is an elastomeric moisture cure that will seal most any surface, and can be put into service as soon as it is torqued.
Sign up to join this community. It has a long shelf-life. RTV silicone comes in a range of thicknesses viscosities , so it can be applied to surfaces by spraying, brushing or pouring. It doesn't shrink as it dries. The final product is highly chemical and temperature resistant. RTV silicone remains flexible after it cures. It captures fine details in casting and molding.
The formulas don't require a releasing agent. RTV silicone has many uses Sealer Sealers block water or other fluids from passing through joints and openings of material. Gaskets Gaskets are a specific kind of seal used between two surfaces that are under pressure. Molds The qualities that make RTV a good material for gaskets also make it a good material for casting and molding.
As a brush-on, the curing times between layers are faster than urethanes, but slower than latex. Crafts RTV is only mildly adhesive so that it can be easily removed from most items.
Read the packaging thoroughly before beginning any project. Knowing which glue gun to use is just as important as knowing which adhesive. You'll need one that fits your specific cartridge. The beauty of silicone is that it can take the place of a gasket altogether. Here is a small block Chevy intake, the factory cork gaskets on the ends tend to push out and leak, so it is common to leave them out and just use a bead of silicone instead. Cleanliness is the biggest factor in getting a good seal.
Make sure both surfaces are clean and free from grease and oil before applying the silicone. On Ford engines, it is a good idea to add a dab of silicone to the end of the intake gaskets and end seals.
Blue RTV This is the general purpose silicone, it can be used for any basic application where two parts need to be sealed. Black silicone is commonly used in Domestic OE assembly, it is for general purpose use. Grey RTV For high-torque applications, such as intake manifolds and close-spaced bolt profiles create higher torque loads on the sealant, grey RTV is used. Commonly used on Imports and high-torque applications, this type of silicone is more flexible when cured.
Heat tolerance is the specialty of red silicone, as it is good up to degrees Fahrenheit long term. High heat applications, such as the driveline seal on a rear end need red high-heat silicone. Related Articles. Previous Previous post: Synthetic Oil vs.
Leave a Reply Cancel Reply Your email address will not be published. Incomplete surface prep. Failure to clean of old gasket or gasket maker materials may result in the mating surfaces coming together in an uneven alignment.
This can compromise the seal and the operation of the assembly. Never scrape off old gaskets with a razor blade or anything that can scratch the metal surfaces and create a leak path. Use a plastic scraper or nylon brush. You may want to also use a chemical gasket remover. Incorrect reassembly. A common gasketing error occurs when the reassembly process is rushed.
Many mechanics believe that 4 hours of cure time is sufficient to return a vehicle back to service when using silicone gasketing products.
However, most gasketing products require 24 hours of cure time. When using RTV gasketing, proper reassembly requires the following:. Using a gasket maker as a dressing on a conventional gasket. This might be the most common gasketing error of all.
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