Does your vintage motorcycle’s gas tank show signs of rust or leaks? That’s a common problem for many riders who want to keep their beloved bikes running smoothly. Old tanks can develop tiny holes or rust spots that let fuel escape or let water get in. This can damage your engine and leave you stranded.
Choosing the right gas tank sealer can feel like a puzzle. There are many different brands and types, and it’s tough to know which one will work best for your specific tank and your needs. You want a sealer that’s strong, easy to use, and won’t cause future problems. Making the wrong choice could mean wasted money and a lot of frustration.
But don’t worry! By the end of this post, you’ll understand what makes a good gas tank sealer. We’ll break down the key features to look for, explain how different sealers work, and help you find the perfect solution to protect your motorcycle’s fuel system. Let’s dive in and get your tank in top shape!
Top Motorcycle Gas Tank Sealer Recommendations
- COMPLETE 3-STEP SYSTEM — EVERYTHING INCLUDED: Kit contains a quart of KBS Klean heavy-duty degreaser, a quart of RustBlast rust remover & metal etch, 8 oz. of Gold Standard Tank Sealer, nitrile gloves, a stir stick, and step-by-step instructions — no extra purchases needed to get the job done right.
- PERMANENTLY SEALS RUST & STOPS CORROSION: Gold Standard Tank Sealer forms a super-tough, non-porous barrier that bonds directly to rust and bare metal, sealing pinholes and weld seams in one application. Once cured, it won't crack, peel, or flake — even years later.
- FUEL & ETHANOL PROOF FORMULA: The cured coating is impervious to gasoline, diesel, ethanol blends, alcohol additives, and most solvents — making it compatible with all modern fuel types including E10, E15, and E85 blends.
- WORKS ON MOTORCYCLES, GENERATORS, MOWERS & MORE: Sized for tanks up to 5 gallons, this kit is ideal for motorcycle and dirt bike tanks, snowmobiles, ATVs, lawn tractors, generators, and other small utility tanks — steel, aluminum, and fiberglass compatible.
- PROFESSIONAL RESULTS WITHOUT SPECIAL SKILLS: The included RustBlast prep step reduces flash rust by over 80% and creates an ideal anchor profile for the sealer, so you get a durable, professional-grade finish even on a first-time DIY project. Made in the USA by KBS Coatings.
- Package Dimensions: 7.62 H x 7.62 L x 7.62 W (centimetres)
- Country of Origin : United States
- Package Weight: 0.226 kilograms
- Flash point: 40.0
- This tank sealer is a polymer coating resistant to gasoline, diesel fuel, alcohol and other fuel additives, it's major use is to seal leaking fuel tanks (1 Qt will seal metal tank up to 14 gallon)
- Easy to use if the directions are followed closely. It seals the of small leaks that often form, you fix the obvious leaks and the sealer seals the rest
- Contrary to what some people will tell you, rust does form inside gas tanks. The cause is condensation and water in gas.
- This sealer seals rust under the coating so it cannot flake off to plug fuel-line filters or cause engine damage. Further rusting is reduced also.
- The coating is very flexible and does not crack as do some of the others. This gives the repair a much longer life.
- The KBS Large Cycle Tank Sealer Kit contains everything needed to seal a tank of up to 12 gallons. It is an All Inclusive Kit!
- This Kit Includes KBS Klean, RustBlast, Tank Sealer, Gloves and Complete Directions.
- The Tank Sealer Permanently seals pinholes & weld seams and is Impervious to all fuels, alcohol additives and most solvents.
- This Kit eliminates all rust and corrosion meaning no clogged fuel filters.
- The Tank Sealer is flexible and able to expand and contract with your tank.
- For Metal Fuel Tanks
- Non-Porous Sealant
- Stops and Prevents Rust
- For Use Inside Fuel Tanks
- ✅ WHY CHOOSE POR-15 FUEL TANK SEALER? POR-15 Tank Sealer is specifically formulated to provide a permanent seal with superior strength and resistance to all fuels, including the new Stage II fuels which have a high alcohol content.
- ✅ STOP RUST - POR-15 is the gold standard in rust prevention, and our Fuel Tank Sealer is no exception. Formulated and developed in our laboratories due to the demand for a high-tech sealer impervious to all fuels, POR-15 is essential in preventing rust and corrosion for long lasting results.
- ✅ PREP FOR SUCCESS - Drain all fuel from tank, remove tank from vehicle, and clean out tank. All fuel tanks are dirty and have to be cleaned out before sealing. If you try to seal a tank without cleaning it first, the new coating will fail, because Tank Sealer won’t stick to gum and varnish. After taking preliminary steps for cleaning and prep, use as directed for an excellent finish.
- ✅ WHEN DO I NEED THIS? – POR-15 Fuel tank sealer is perfect for automotive restoration. Renew your car, truck, or motorcycle fuel tank through our simple, single application coating. Allow proper time to cure for impervious protection from fuel, alcohol, corrosion and rust.
- ✅ OUR SATISFACTION COMMITMENT - At POR-15 we strive to bring the ultimate in rust prevention. Known for the unbeatable 3-step stop rust system, POR-15 is trusted by DIY & Professionals. We are committed to innovation, quality control, and excellent customer service. If you are not satisfied, let us know & we’ll do everything we can to make it right!
- Hand-mixable, steel-reinforced, non-rusting epoxy putty that quickly repairs or rebuilds anything made of metal
- Great for gas tanks, radiators, lawn and garden equipment, water tanks and all metals
- Sets in 5 minutes and fully cures dark grey in 1 hour with a tensile strength of 900 PSI
- Once cured, it can be drilled, tapped, machined, ground, filed and painted and will withstand temperatures up to 300ºF
- J-B Weld is proudly made in the USA
- The KBS Auto Fuel Tank Sealer Kit contains everything needed to seal a tank of up to 25 gallons. It is an All Inclusive Kit!
- This Kit Includes KBS Klean, RustBlast, Tank Sealer, Gloves and Complete Directions.
- The Tank Sealer Permanently seals pinholes & weld seams and is Impervious to all fuels, alcohol additives and most solvents.
- This Kit eliminates all rust and corrosion meaning no clogged fuel filters.
- The Tank Sealer is flexible and able to expand and contract with your tank.
Choosing the Right Motorcycle Gas Tank Sealer: A Buyer’s Guide
A rusty or leaking gas tank can be a real problem for any motorcycle rider. It can damage your bike and even be dangerous. Fortunately, a motorcycle gas tank sealer can fix these issues. This guide will help you find the best one for your needs.
What to Look For: Key Features
When you shop for a gas tank sealer, think about these important features:
- Type of Sealer: There are two main types: liquid and epoxy. Liquid sealers are easier to use. They coat the inside of the tank. Epoxy sealers are stronger. They form a tough layer.
- Durability: You want a sealer that lasts a long time. It should protect your tank from rust and leaks for years.
- Compatibility: Make sure the sealer works with your motorcycle’s tank material. Most sealers work with steel tanks. Some are made for plastic or fiberglass tanks. Always check the product label.
- Ease of Use: Some sealers are simple to pour and let dry. Others need more steps, like cleaning and special preparation. A user-friendly sealer saves you time and hassle.
- Corrosion Resistance: The best sealers fight rust very well. They create a barrier that stops water and air from reaching the metal.
- Fuel Resistance: The sealer must withstand different types of fuel, including gasoline and ethanol.
Important Materials
Most good gas tank sealers are made from strong, chemical-resistant materials.
- Epoxy Resins: These are very common. They create a hard, protective coating. Epoxy is tough and lasts a long time.
- Polyurethane: This material is also used. It offers good flexibility and durability.
- Special Polymers: Some sealers use unique polymer blends. These are designed for specific protection needs.
What Makes a Sealer Great (or Not So Great)?
Several things affect how good a gas tank sealer is.
- Quality of Ingredients: Better ingredients make a stronger, longer-lasting seal. Cheap fillers can make the sealer break down faster.
- Proper Preparation: How well you clean and prepare the tank before sealing is very important. If the tank isn’t clean, the sealer won’t stick well. This reduces its quality.
- Application Instructions: Following the instructions carefully is key. If you skip steps, the sealer might not work as well.
- Storage Conditions: Storing the sealer properly before use helps maintain its quality. Extreme heat or cold can damage it.
User Experience and How to Use It
Using a gas tank sealer can be a rewarding DIY project.
- User Experience: Many riders find sealing their own tank saves them money. It can be a bit messy, but most kits come with clear instructions. Good kits include all the necessary tools.
- Use Cases:
- Repairing Leaks: If your tank has small holes or cracks, a sealer can fix them.
- Preventing Rust: Old tanks can rust from the inside. Sealing them stops this.
- Restoring Vintage Bikes: For classic motorcycles, a good sealer keeps the original tank in great shape.
- Long-Term Storage: If you plan to store your bike for a while, sealing the tank helps prevent damage.
Frequently Asked Questions: Motorcycle Gas Tank Sealers
Q: What is a motorcycle gas tank sealer?
A: A gas tank sealer is a product you put inside your motorcycle’s fuel tank. It coats the inside walls to stop rust and fix small leaks.
Q: Why do I need to seal my motorcycle gas tank?
A: You need to seal it if it has rust inside or if it is leaking fuel. Sealing protects your tank and your bike.
Q: Can I use any sealer on any gas tank?
A: No, you must check the product. Some sealers are for steel tanks only. Others are for plastic or fiberglass.
Q: How long does a gas tank sealer usually last?
A: A good quality sealer can last for many years, often 10 years or more.
Q: Is it hard to apply a gas tank sealer?
A: It can be a bit tricky, but most kits are designed for DIY use. Following the instructions carefully makes it easier.
Q: What are the main steps to sealing a gas tank?
A: You usually need to clean the tank thoroughly, then pour in the sealer, let it coat the inside, and finally drain the excess and let it dry completely.
Q: Will a sealer work on a big hole in my gas tank?
A: No, sealers are best for small rust spots, pinholes, or very small cracks. Large holes need welding or replacement.
Q: Can I paint over a sealed gas tank?
A: Yes, most sealers are compatible with paint once they are fully cured. Always check the product details.
Q: How much does a gas tank sealer typically cost?
A: Prices can vary, but a good kit usually costs between $30 and $70.
Q: Where can I buy motorcycle gas tank sealer?
A: You can find them at most motorcycle parts stores, auto parts stores, and online retailers like Amazon.