Guide, updated 2026-11-14

Rust stain remover questions, answered

Short answer: SpraySticks makes dry, pre-measured rust stain remover. Sticks dissolve in your own 16 to 24 oz spray bottle, and gallon pods dissolve in a pump-up or backpack sprayer. Use one stick or one pod per 1.5 gallons for light stains, two sticks or one pod per gallon for heavy ones. Always wear gloves and eye protection.

Below are the questions we hear most, grouped by topic. For step-by-step help on a single job, use the rust stain removal checklist.

Using sticks and pods

How do the sticks work?

Each stick is a dry, pre-measured dose of rust stain remover sized for a standard household spray bottle. Fill a 16 to 24 oz bottle with water, drop in one stick for light stains or two sticks for heavy stains, and let it dissolve. Swirl or shake gently, cap it and spray. There is no powder to scoop, no measuring cup and no heavy jug to carry home. See how it works for the full mixing steps.

How long does a stick take to dissolve?

Usually a few minutes in room temperature water. Swirl the bottle now and then to help it along, and wait until no solid pieces remain before you spray. Cold water slows it down. Spraying before it has fully dissolved gives you a weak first pass and a strong last one, so it is worth the short wait. Leave the cap loose while it dissolves, then tighten it before you shake.

How do the gallon pods work?

Gallon pods are the larger format for pump-up and backpack sprayers. Fill the tank about halfway with water, drop in the pods, let them dissolve for a few minutes, agitate gently and top off with water. Use one pod per gallon for heavy stains or one pod per 1.5 gallons for light stains. Four pods fill a standard 4 gallon backpack sprayer.

How long should I leave it on?

It depends on the surface. Concrete driveways take 10 to 15 minutes. Pavers, vinyl fences and fiberglass take 5 to 10 minutes. Vinyl siding takes 3 to 8 minutes, and car wheels take 2 to 3. Keep the surface wet the whole time and rinse well. Never let it dry on. The dwell time guide covers each surface and the signs it is working.

What if one pass does not remove the stain?

Rinse, let the surface dry fully, then do a second timed pass on what remains. A second pass works better than a stronger mix or a longer dwell. Old, dark stains on concrete often need two passes. If a stain survives two passes, check that it is actually rust, because mildew, oil and tire marks will not respond. The source may also still be feeding it.

Can I save mixed solution for later?

Mix what you need and use it the same day. Leftover solution in an unlabeled bottle is a hazard for anyone who finds it later. That is one reason the product ships dry: you keep sticks and pods sealed until the day you need them, then mix a fresh batch. If you must keep a mixed bottle briefly, label it clearly and store it out of reach.

Surfaces

Can I use it on my concrete driveway?

Yes. Broom-finished concrete is one of the most common uses. Pre-wet the slab, apply the solution, keep it wet for 10 to 15 minutes, scrub with a stiff nylon brush and rinse well. Test a corner first, since it can lighten some concrete slightly. Wait until new concrete has fully cured before treating it. The concrete guide has the full method.

Will it work on vinyl siding and vinyl fences?

Yes, at a light strength and with careful rinsing. Wet the siding or fence and the plants below, apply from the bottom up, let it work 3 to 8 minutes on siding or 5 to 10 on fences, and rinse from the top down. Work in shade so it does not dry. See the vinyl siding guide and the white vinyl fence guide.

Can I use it on my boat?

The MARINE line is made for fiberglass, gelcoat, docks and trailers. Apply a light solution, keep it wet 5 to 10 minutes, wipe with a soft cloth, then rinse with fresh water and rewax the area, since the treatment can strip wax. Keep it out of the water you are floating in, and test painted bottoms or vinyl graphics first. The boat guide covers gelcoat in detail.

Is it OK on car wheels?

The AUTO line is for painted and clear coated wheels with orange brake dust specks or light rust. Work on cool wheels, spray a light mix, wait 2 to 3 minutes, agitate with a soft wheel brush, then rinse and dry. Test the back of a spoke first, and skip it on raw polished aluminum or damaged finishes. See the car wheel guide.

What surfaces should I avoid?

Do not use it on marble, limestone, travertine, coquina, flagstone or any other natural stone, which it can etch. Avoid fresh concrete that has not fully cured, raw polished aluminum, damaged paint, and any finish the maker says should not contact corrosive cleaners. When unsure, test a small hidden spot, wait the full dwell time, rinse and check once dry.

Will it hurt my grass and plants?

Runoff can damage grass and plants if it sits on them. Soak the lawn and beds with plain water before you start, keep wetting them as you work, and rinse them thoroughly when you finish. Direct driveway rinse water toward a drain or the street rather than into flower beds. Do not spray on windy days, when overspray drifts.

Can I use it around a pool?

Keep it out of the pool water. Rinse the deck with plain water first, work in small sections and direct rinse water away from the pool. Pool water contains chlorine, and rust remover should never be mixed with chlorine or bleach. Never use it on natural stone coping such as travertine, limestone or coquina, which is common around pools.

Safety and storage

Same compound as spinach. Way less friendly than a salad.

What safety gear do I need?

Wear chemical-resistant gloves and sealed eye protection every time, along with closed shoes and long sleeves. Regular sunglasses do not stop splashes. Keep children and pets indoors while you work. Read the label and the safety data sheet before your first job, especially the sections on hazards, first aid and protective equipment.

What do I do if it gets in my eyes or is swallowed?

If it gets in the eyes, rinse with clean running water for several minutes, removing contact lenses if you can, and call Poison Control at 1-800-222-1222. If it is swallowed, call Poison Control at 1-800-222-1222 right away and follow their directions. Do not induce vomiting unless told to. Keep the package with you so you can read them the label.

Can I mix it with bleach or other cleaners?

No. Never mix rust remover with bleach, chlorine, pool chemicals or any other cleaner, and do not use it right after bleach on the same surface without rinsing thoroughly in between. Mixing cleaners can release dangerous gases. Use only clean water to mix sticks and pods, and keep the sprayer you use for rust remover separate from one you use for anything else.

How should I store sticks and pods?

Keep them in their sealed packaging in a cool, dry place, away from moisture, out of reach of children and pets, and away from food and drinks. A locked garage cabinet works well. Because they are dry, they keep far better than mixed liquid, but humidity can make them clump, so reseal the pouch after each use.

Why do the sticks ship dry?

Ready-to-use rust removers are mostly water, and water is heavy to ship. A dry stick or pod lets you add your own water at home, so you are not paying to move gallons of liquid across the country. Dry product also stores neatly in a cabinet and stays sealed until you need it.

Color lines and sprayers

What do the blue, green and red colors mean?

They mark the three product lines. MARINE is blue, for hulls, gelcoat, docks and trailers. HOME is green, for concrete, siding, fences and patios. AUTO is red, for wheels and other automotive jobs. The color shows in the bottle once the stick dissolves, so a boat cleaner never gets confused with a bottle of fresh water on board, and you can tell your mixes apart at a glance.

What kind of spray bottle should I use?

Any sturdy plastic trigger bottle that holds 16 to 24 oz. Use a bottle that has never held another cleaner, or rinse a used one very thoroughly first. Never use a drink bottle. Label it with the product name and the date so nobody mistakes it for something else.

Which pump-up or backpack sprayer works best?

A plastic sprayer with chemical-resistant seals. Avoid brass and steel tanks, wands and nozzles, which corrode. Flush the tank, hose and wand with clean water after every use and spray it through the nozzle. The pump sprayer guide covers setup, pod counts and flushing.

Can I use a pressure washer to apply it?

We recommend a spray bottle, pump-up sprayer or backpack sprayer to apply the solution, so you control where it goes and how long it stays wet. A pressure washer works well for the final rinse on concrete, held at a sensible distance with a wide tip. Use only low pressure on vinyl, paint and fiberglass, which high pressure can damage.

Orders, shipping and returns

What sizes and prices are there?

Spray bottle sticks come as a single for $9.99, a 3-pack for $24.99 and a 6-pack for $44.99. For sprayers, the Pump Pack is $24.99 and the Backpack Pack, with four gallon pods for one full backpack tank, is $49.99. The Pro Pail is $249 for pros and very large areas. See every size on the shop page.

Which size should I buy?

For a few fertilizer dots, a furniture ring or a single streak, a single stick or a 3-pack is plenty. For a sprinkler band along a driveway or fence, the Pump Pack or Backpack Pack is easier. For pressure washing crews or large commercial areas, the Pro Pail. The driveway cost guide and the cost per gallon comparison help with the math.

Where do you ship?

Because rust remover is a corrosive cleaner, it ships by ground only to the lower 48 states. In-stock orders usually ship in 1 to 2 business days. Shipping costs and any free shipping threshold are shown in the cart before you pay. You can check an order's status on the order tracking page linked in the site footer.

Where is it made?

SpraySticks is made in Merritt Island, Florida, where well water rust stains on driveways, fences and boats are part of everyday life. That is where we use it, test it and pack every order before it ships out by ground across the lower 48 states.

What is your return policy?

Unopened product can be returned within 30 days for a refund. For safety reasons we cannot accept opened product. If something arrives damaged or a pouch is missing, email us with a photo of the package and we will replace it. Full details are on the returns page, and you can reach us through the contact page with your order number.

How do I contact you about an order?

Use the contact page and include your order number and the email address you used at checkout. Pick the topic that fits, such as order or shipping, damaged or missing item, or return or refund, so your message reaches the right place. Questions about using the product on a specific surface are welcome too.

More guides

Prevention: how to prevent rust stains. Sprinkler stains: irrigation rust stain guide. Safety details: safety data sheet.

Spinach check: SpraySticks shares a compound with spinach. That does not make it food or gentle. Gloves, eye protection, keep kids and pets away, never mix with bleach, and read the SDS.

Common questions

How do the rust remover sticks work?

Each stick is a dry, pre-measured dose of rust stain remover. Fill your own 16 to 24 oz spray bottle with water, drop in one stick for light stains or two for heavy ones, let it dissolve and shake gently. You get a ready spray without measuring powder or hauling a jug of liquid home.

What surfaces can I use rust stain remover on?

Common uses are broom-finished concrete, concrete and clay pavers, vinyl siding, vinyl fences, fiberglass and gelcoat, and painted or clear coated wheels. Test a hidden spot first on every surface. Do not use it on marble, limestone, travertine, coquina or any natural stone, or on fresh concrete that has not cured.

What safety gear do I need?

Wear chemical-resistant gloves and sealed eye protection every time, plus closed shoes and long sleeves. Keep children and pets away while you work. Never mix it with bleach or other cleaners. If it is swallowed or gets in the eyes, call Poison Control at 1-800-222-1222 and follow the first aid on the safety data sheet.

How many gallon pods do I need for a sprayer?

Use one pod per gallon of water for heavy stains or one pod per 1.5 gallons for light stains. Four pods fill a standard 4 gallon backpack sprayer at heavy strength. For a 1 or 2 gallon pump-up sprayer, scale the pod count to the tank size using the same ratio.

What do the blue, green and red colors mean?

They mark the three product lines. MARINE is blue, for hulls, gelcoat, docks and trailers. HOME is green, for concrete, siding, fences and patios. AUTO is red, for wheels and other automotive uses. The color shows in the bottle so you can tell your mixes apart at a glance.

Can I return rust remover?

Unopened product can be returned within 30 days for a refund. For safety reasons we cannot accept opened product. If something arrives damaged, email us with a photo of the package and we will replace it. Full details are on the returns page linked in the site footer.