Frequently Asked Questions

Is Evapo-Rust safe to use on the inside of gas tanks?

Many happy customers have used Evapo-Rust for this exact purpose. Evapo-Rust is not acidic and will not eat away good metal or promote rust like acids. It is also water soluble so it can be rinsed with water. Small tanks, like motorcycle tanks, can be filled to the top. Larger tanks can be partially filled with Evapo-Rust. After the product has had enough time to work (an hour for light rust or 8-12 hours for heavy rust), it can then be rotated to cover a different part of the tank. Continue to rotate the tank until you have removed the rust from the entire tank. If a lot of rust is removed from the tank, there may be some carbon residue left behind. In normal situations, you can remove this easily with a pad. However, the inside of a gas tank would be best cleaned out with a pressure washer. Purchase Evapo-Rust

How can I get a rust stain off my kitchen floor?

Boeshield Rust-Free Spray is a great rust stain remover for a variety of surfaces. If the stain is on concrete, however, Concrete Rust Remover, made by Singerman Laboratories, is the way to go.

How do I paint a rusty metal fence?

You can use a rust remover to remove the rust, but if it is a large stretch of fence, you might save time, effort, and money by using a rust converter. Rust converter can be applied to a large area to convert rust into a black inert substance that can be painted over quite easily.

What can I use to remove rust without damaging a painted surface?

Since acid is known to dull or remove paint, a less acidic rust remover is preferable. Evapo-Rust is pH neutral and is the mildest rust remover available and will not damage a painted surface.

How do you remove rust from a concrete driveway?

Concrete Rust Remover is the best product to remove rust from concrete and can be applied to a large area. A 22-oz. container is enough to cover 60 square feet.

What is the best rust remover for wrought iron?

If the wrought iron is to be painted, you can use a rust converter to create a paintable, rust-free surface. Apply two coats of the rust converter and follow-up with an oil-based paint as a top coat.

What are some of the milder rust removers?

Evapo-Rust is a pH neutral rust remover that requires soaking the object. Bullfrog Rust Remover is highly effective and only mildly acidic.

What's the best way to remove rust from small metal parts?

Small parts like nuts and bolts, and small components, are best removed with Evapo-Rust. Since the parts are small, they can easily be submerged in the Evapo-Rust liquid for a good soaking.

How do I remove rust from vinyl siding?

Boeshield Rust-Free Spray is great for vinyl siding. Check out the before/after photos sent in by a satisfied customer: Rust-Free Before/After.

Is there a product that takes rust stains out of clothing?

Yes. Magica Rust Remover works quite well on clothing with no scrubbing necessary. Just test it on a very small, indiscrete part of your clothing before applying it to a larger, more prominent spot.

Can I brush Evapo-Rust on my rust spots?

Evapo-Rust is a soaking rust remover. If you simply apply Evapo-Rust to a rusted area it will evaporate before much rust removal occurs. To remove light rust, soak for ½ hour to an hour. For heavy rust, soak for 8 or more hours. Evapo-Rust works great on small items like rusty nuts and bolts. It also works great on rusty automotive gas tanks.

What do I do about a rusted nut that just won't budge?

Boeshield Rust-Free Spray, a strong acidic rust remover, is a great way to remove that rust quickly.

How should I remove rust from a surface before painting it?

The most efficient way to deal with the rust may be to NOT remove it at all. A rust converter—which does not remove the rust, but oxygen-starve it and convert it to a black inert substance—might be exactly what you need get a smooth rust-free surface to paint. Just apply two coats of rust converter, 24 hours apart. Then, wait another 48 hours to start painting.

How do different rust removers differ?

There are many different factors that distinguish rust removers from one another. To select the right rust remover for your specific need, check out our Rust Remover Comparison Chart.

How can I get a durable rust prevention coating for machine parts?

Boeshield T-9 is a waxy rust prevention product that offers a 6-month layer of protection for machine parts. Unlike paints, it is easily removable and is available in 12-oz. spray cans or in gallon jugs.

I have a brass musical instrument that I want to protect from rust formation. What products can I use?

Because you want to avoid using chemicals on instruments that are put in your mouth, you will want to store the instrument in an air-tight compartment with either a moisture controlling desiccant product, like silica gel packs, or a Vapor Corrosion Inhibitor (VCI). Bullfrog makes several VCI's that emit a substance that protects metals against corrosion-causing moisture. Try the Bullfrog Emitter Shield, Bullfrog Rust Blocker Strips, or the Bullfrog Emitter Cup.

I have a 5-gallon motorcycle gas tank that I want to soak with Evapo-Rust. Can I buy a one-gallon jug and fill the rest with water?

We don't recommend diluting Evapo-Rust. It simply won't yield good results. We have an Evapo-Rust 5-gallon container that is perfect for motorcycle gas tanks. If you want to make due with less, you can fill the tank halfway, let it soak, and then shift it to get other parts of the tank.

I store my hand tools and power tools in a damp location. How can I protect them from rust?

We recommend storing tools in an airtight container. Also, to protect your tools from any moisture that seeps in while the container is open (the less you open it the better), we recommend using the Bullfrog Rust Blocker Emitter Shield, a Vapor Corrosion Inhibitor.

What can I use to remove rust from vinyl weave fabric?

We've had good customer satisfaction using Boeshield Rust-Free Spray on vinyl. Test it in an inconspicuous spot first.

What should I use to restore rusted cast-iron power tools?

We recommend Boeshield Rust-Free Spray to remove rust from cast iron. Very heavy rust may require multiple applications. Heavy rust is also remedied with an abrasive. Just remember that the abrasive won't tell the difference between rust and iron, so use accordingly.

I'm done soaking my rusted item in Evapo-Rust. How do I clean off any residue?

Make sure you rinse off after you remove it from the Evapo-Rust solution. You can rinse it off with either water or clean Evapo-Rust solution to provide temporary rust protection.

I have a lot of wrought-iron lawn furniture that needs rust removed. How do I use Evapo-Rust if I don't have a large dip tank?

Evapo-Rust is a superb rust remover, but it must have constant contact on the rusty surface. For this situation Bullfrog Rust Remover would be a good bet. It's a surface treatment in a gel form and it's faster-acting than Evapo-Rust. If you're going to paint the furniture when you're done, another option would be to apply Rust Converter. It seals in the rust and stops it from further rusting. In addition it provides a stable surface for you to paint over when you're finished with an oil-based paint.

Can Boeshield T-9 be removed?

Yes, Boeshield T-9 can be removed with mineral spirits or a degreaser.

I have rust on the brick siding on my house. What product should I use?

Concrete Rust Remover will remove rust from brick. Just like with any rust removal from a colored surface, test a small amount on an inconspicuous spot first before applying to a larger area.

I have a strong allergy to chemicals with strong odors. What is the best rust remover for me?

Bullfrog Rust Remover is a low-odor rust remover. For rust protection with minimal odor, we recommend Bullfrog Rust Blocker.

Can Rust Converter be sprayed on instead of rolled or brushed on?

Yes, Rust Converter can be sprayed on. It is only slightly more viscous than a latex paint. Do not thin rust converter.

What is a good product to remove rust form vinyl siding?

Boeshield Rust-Free Spray is good at removing rust from vinyl siding. It is very acidic, though. So, be careful not to get it on any plants surrounding the house.

What are the shelf lifes for rust products?

The only product we carry with a shelf life is rust converter. We rotate our stock frequently to assure that the freshest batches reach our customers. The rust converter will be good for nine months after purchase.

How long does Evapo-Rust last?

Evapo-Rust does not have a shelf life, so you don't have to use it up within a given timeframe. Once you start using Evapo-Rust, its rust-removing qualities will gradually diminish. The solution will start to turn black and will eventually stop removing rust. Feel free to use it until this happens. If you so choose, you can have a fresher batch of Evapo-Rust to follow your used Evapo-Rust for a final soak.