• Rust Encapsulator Products: Benefits, Drawbacks, Reviews and Instructions

    If your car’s body or undercarriage has rust, a rust encapsulator may be just what you need to keep the rust from spreading and destroying the metal parts of your car. Here are a few of the rust encapsulator products available on the market, some information regarding positives and negatives pertaining to the use of encapsulation products and a short description of how to use them.

    What It Does

    If your car has rust on it in any quantity, before being able to paint, you will need to ensure that the rust doesn’t continue to spread. This means you will need either a rust encapsulator or a rust converter. Rust encapsulation products keep rust from spreading by covering the rust and not allowing air to come in contact with the rusted metal parts. Rust encapsulation products don’t require a primer prior to painting. Rust conversion products, on the other hand, use a chemical process to convert the oxidation on the metal into a paintable polymer, effectively ensuring that the rust won’t spread. One of the major problems with rust encapsulator products is that they are a type of paint. This means that if application isn’t just right, it can flake off. This also means that with a heavy enough impact, it can actually be knocked off the protected metal.

    Products Available

    There are a number of rust encapsulator products available on the market. However, there are three main ones that have captured the major portion of the market share. These three products are:

    • Rust Bullet: According to their website, Rust Bullet’s first coat penetrates the rust on your car and dries all of the moisture from it. Succeeding layers provide separation between rust-causing air and the metal. This product has been granted two patents for new technologies that are incorporated in it.
    • Rust Encapsulator: This product, from  Eastwood, provides UV protection, protection against what is known as “rust creep” or the expansion of the rusted areas, and durability.
    • POR 15: This is a leader in the rust encapsulation market. This is a product that doesn’t incorporate UV protection, requiring an additional clear coat on parts exposed to direct sunlight.


    There are some drawbacks to consider with rust encapsulation products. Some of these negatives are as follows:

    • Extensive surface preparation is required. This includes a thorough cleaning and degreasing, as well as a thorough wire brushing of the affected areas.
    • These are basically paints. This means that metal flex and heavy impacts can cause the product to flake off, degrading the protection they provide.


    Rust encapsulators can be applied in a variety of ways. Any way that a regular paint can be applied can be used to apply rust encapsulation products. These methods include:

    • Brush: No thinning required.
    • Roller: No thinning required.
    • Spray: Thinning to 20 percent is allowed for spray application.