My vintage motorcycle has a rusted gas tank. Who offers tank sealing and lining kits?

For a vintage motorcycle with a rusty gas tank, several companies make fuel tank sealing/lining kits that include rust removal, surface preparation, and an internal coating. Common choices include:

A few things to check before choosing a kit:

• Heavy flaking rust: You’ll usually need mechanical rust removal (nuts/bolts, chain, abrasive media, or electrolysis) before sealing.
• Old liner peeling inside: Choose a kit that includes a stripping step, such as KBS’s PLUS kit.
• Pinholes or thin metal: A liner can seal tiny leaks, but badly weakened tank metal may need welding or replacement first.
• Ethanol fuel compatibility: Look for a sealer rated for modern fuels; both POR-15 and KBS advertise fuel-resistant formulations for this purpose.

For a typical vintage steel motorcycle tank restoration, the two most commonly used DIY options are POR-15 Motorcycle Fuel Tank Repair Kit and KBS Cycle Tank Sealer Kit.

If you tell me the motorcycle make/model/year and whether the tank has bare rust, pinholes, or an old liner already inside, I can suggest the best kit and process.

Here are top web results for exploring this topic:

Gas Tank Lining·https://gastanklining.com Fix Motorcycle Gas Tank, Rust Removal, Lining, Sealing, Fuel tank Fix your motorcycle gas tank permanently. Gas tank rust removal, repair, cleaning, lining, sealing. America's #1 Gas tank repair and restoration service since 2002... Motorcycle Fuel Tank Services·https://www.fueltankservices.com**Motorcycle Fuel Tank** Services The World Leader in 100% Rust Removal and Permanent Motorcycle Fuel Tank Liners. www.motorcyclefueltankservices.com·http://www.motorcyclefueltankservices.com/**Motorcycle Gas Tank** Services •The new liner is a permanent fuel tank coating. •No harm to external paint work. •No cutting, sawing, drilling or welding to your tank. •Any steel, aluminum or fiberglass tank. •Don't wait for a gas KBS Coatings·https://kbs-coatings.com Cycle Tank Sealer Kit – Motorcycle Fuel Tank Sealer - KBS Coatings The KBS Cycle Tank Sealer Kit gives you everything needed to clean, prep, and permanently seal tanks up to 5 gallons — including motorcycle, generator, lawn mower, tractor, snowmobile, and utility tan Facebook·https://www.facebook.com Which shop can remove rust from the inside of a metal motorcycle ...Gas Tank Exchange, GP Bikes, and Motorcycle Enhancements are recommended for rust removal from metal motorcycle gas tanks. Daniel Currell. I have been restoring bike tanks for over 20 years and over 1 Gas Tank First Aid·https://gastankfirstaid.com INSTALL LINER - USED MOTORCYCLE GAS TANK We specialize in the repair and restoration of vintage and new motorcycle gas tanks. Services include gas tank tumbling. gas tank rust removal, gas tank cleaning, gas tank sealing, gas tank liner remo Adventure Rider - Ride the World.·https://www.advrider.com**Fuel tank rust** repair around the Denver area - Adventure Rider Olas Long timer. Joined: Aug 14, 2007. Oddometer: 5,377. Location: Evergreen, CO. I am beginning to restore a GL1000 and it, like most GLs that sit around for a long time, has rust inside of the tank. OnAllCylinders·https://www.onallcylinders.com Video: How to Save Your Rusty Fuel Tank with a POR-15 Cleaning ...Got a rusty gas tank? Learn how this POR-15 fuel tank sealing/coating system can help you clean & repair it for miles of more use. POR-15·https://por15.com POR-15 Motorcycle Fuel Tank Repair Kit Restore motorcycle gas tanks with this POR-15 kit. Includes Cleaner Degreaser, Metal Prep, Fuel Tank Sealer, and reinforcing fabric for patching weak areas. Reddit·https://www.reddit.com**Does** anyone have experience using 'Tank Liners /Sealers ... - Reddit 16 votes, 49 comments. I plan on de-rusting my gas tank and I've seen a few conversations for and against liners/sealers. Any way ya'll do your stuff?

Several leading brands offer comprehensive, multi-step motorcycle fuel tank sealing and lining kits specifically engineered to strip rust and coat the interior . Because modern ethanol blends can easily destroy standard paints, these specialized kits use fuel-impervious formulas to create a permanent internal barrier.

Top Motorcycle Gas Tank Sealer & Liner Kits

This is a highly popular , professional-grade kit that includes a cleaner/degreaser, a zinc phosphate metal prep to chemically etch the metal, and a non-porous, flexible sealer film that resists high-alcohol fuel blends. You can purchase this complete restoration system directly from the official POR-15 Online Store.

This 3-step kit features a water-based heavy degreaser, a powerful "RustBlast" remover/etcher, and their signature "Gold Standard" silver metallic tank sealer. It seals pinholes and is designed to expand and contract flexibly with temperature changes. It is available on the official KBS Coatings Website.

A vintage restoration classic that uses a 3-bottle system consisting of two prep solutions and a final white elastomer sealer compound. It treats tanks up to 3 gallons and is available through major motorcycle retailers like RevZilla.

An alternative to polyurethane sealers, this is a two-part epoxy-based liner known for being exceptionally thick and rigid. It is highly regarded by professional builders because it is excellent for filling larger pinholes or treating heavily corroded tanks. You can find it directly on the Caswell Plating Shop.

A solvent-based polymer coating that creates a flexible, bright-red internal membrane. It is formulated to tolerate minor left-behind flash rust during the prep process without peeling or flaking off. It is manufactured by Damon Industries.

Crucial Success Factors

1. Prep work is 90% of the job. Every single manufacturer warns that the liner will fail, bubble, or peel if you do not completely strip out the grease, varnish, and loose rust first.
2. Remove everything. Take off the petcock, gas cap, and fuel filters before pouring anything inside, or the chemical sealers will permanently clog them.
3. Patience during curing. Most kits take anywhere from 2 to 5 days to fully cure before it is safe to put modern gasoline back into the motorcycle tank.

If your tank is severely damaged with major structural holes, you might want to look into professional mail-in options like Motorcycle Fuel Tank Services , which use electrochemical industrial machines to clear 100% of the rust before applying a vulcanized liner.

To help you choose the right approach, what is the make and model of your motorcycle, and do you see any visible fuel leaks or pinholes on the exterior?

Yes. For a vintage motorcycle tank, several companies make dedicated fuel-tank cleaning, rust-removal, sealing, and lining kits:

• POR-15 — Their Motorcycle Fuel Tank Repair Kit is designed specifically for motorcycle tanks up to about 6 gallons. It includes cleaner/degreaser, metal prep, sealer, and reinforcing material. POR-15 says the cured coating resists modern fuels and seals small pinholes.

  POR-15 Motorcycle Fuel Tank Repair Kit

$79.00

• KBS Coatings — Their Cycle Tank Sealer Kit is a three-step system: KBS Klean → RustBlast → Gold Standard Tank Sealer, for tanks up to 5 gallons. They also sell a larger version for tanks up to 12 gallons.

  KBS Cycle Tank Sealer Kit

$50.00

• Kreem Products — A long-established motorcycle tank-liner option. Their kits combine tank preparation chemicals with a fuel-resistant liner. ### Kreem Fuel Tank Prep and Liner Combo Pak $43.04

Which I'd consider

For a seriously rusted vintage tank, I'd lean toward POR-15 or KBS, rather than simply pouring in a liner. The preparation is critical: loose rust, varnish, and especially an old failed liner need to be removed before applying the new coating. KBS even offers a PLUS kit specifically for stripping an existing failed liner.

If you tell me the motorcycle make/model/year and approximate tank capacity, I can narrow it down to the best kit and tell you whether I'd use POR-15, KBS, or another option.

Several top-tier brands offer specialized multi-step motorcycle gas tank cleaning, de-rusting, and lining kits formulated to withstand modern ethanol blended fuels.

Leading Tank Sealing & Lining Kits

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• Features a highly regarded 3-step system.
• Includes a water-based heavy-duty degreaser, a rust remover/metal etch, and a silver metallic polyurethane sealer.
• Specially formulated to remain flexible, allowing the liner to expand and contract with the tank.

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• Utilizes a trusted, professional-grade polyurethane-based sealant.
• Comes with a specialized cleaner/degreaser, a metal prep rust remover, and an exterior reinforcing fabric to patch existing pinholes.
• Highly praised by restoration professionals for creating a permanent, rock-hard barrier against moisture.

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• Differs from others by using a two-part epoxy-based system.
• Cures into a thick, highly rigid, glass-like "tank within a tank" layer.
• Widely favored in vintage forums for severely damaged tanks because the thick epoxy easily bridges large cracks and pinholes.

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• A classic, widely available brand featuring a 3-bottle preparation and sealing kit.
• Cures to a distinct tough white elastomer skin.
• Safe for dual-sport and vintage applications, though precise execution of the prep stage is mandatory for proper adhesion.

The Secret to Success: Preparation

No matter which brand you choose, the liner will fail and flake off if the prep work is rushed.

1. Strip Everything : Remove the fuel petcock, gas cap, and fuel filters before starting. Plug the holes securely.
2. Mechanical De-rusting : Drop a handful of nuts, bolts, or a length of clean chain into the tank and shake it vigorously to mechanically break loose heavy rust flakes before applying chemical treatments.
3. Bone Dry : The interior must be 100% dry before pouring the final sealer. Use a hairdryer or heat gun on a low setting to ensure no flash moisture remains trapped beneath the coating.

If you would like, please let me know:

• What model and year is your motorcycle?
• Does the tank have any active leaks or pinholes , or just surface rust?
• Has the tank ever been previously lined with an old sealer?

I can help you choose the exact formula or guide you through the stripping process.

Yes. For a vintage steel motorcycle tank, several companies make dedicated cleaning/rust-removal + internal-lining systems:

• POR-15 — Their Motorcycle Fuel Tank Repair Kit is specifically sized for motorcycle tanks up to about 6 gallons. It includes cleaner/degreaser, rust-prep/etching solution, sealer, and patching material.

  POR-15 Motorcycle Fuel Tank Repair Kit

$79.00

• KBS Coatings — Makes a three-step Cycle Tank Sealer Kit with cleaner, rust remover and an internal fuel-resistant coating. Kits are available for tanks up to roughly 5 gallons and larger. ### KBS Cycle Tank Sealer Kit $50.00

• Kreem — Offers traditional tank-liner kits that clean and coat the inside of steel tanks. It's widely available, although I'd personally favor an epoxy-type system such as POR-15 or Caswell for a valuable vintage restoration; motorcycle enthusiasts report more mixed experiences with Kreem.

• Red-Kote — Another established liquid tank liner. It's popular for rusted tanks and pinhole sealing, though user experience varies depending heavily on preparation and fuel exposure.

For a valuable vintage bike, my first choice would be an epoxy-style liner (POR-15 or Caswell) rather than simply coating over loose rust. The critical part is getting all loose rust, old liner, varnish and contamination out first; POR-15 specifically warns that the tank must be thoroughly cleaned and etched for the sealer to adhere properly.

If you tell me the motorcycle make/model/year and whether the tank has pinholes or just surface rust inside, I can recommend the most appropriate kit and procedure.

Restoring a vintage motorcycle gas tank with a rust-sealing kit is a classic DIY project. Several trusted brands offer complete kits containing a cleaner/degreaser, a rust remover/etcher, and the final fuel-resistant tank sealer.

A very popular choice among vintage motorcycle restorers. It includes Marine-Clean to clean and degrease, Metal Ready to remove rust and leave a zinc phosphate coating, and POR-15 Fuel Tank Sealer Go to product viewer dialog for this item., which forms a tough, non-porous film resistant to all fuels, including ethanol blends. You can find more details or buy it directly on the POR-15 Official Website.

A traditional favorite in the motorcycle community for decades. The Kreem system involves a three-step process: Wash (degreaser), Prep (rust remover/etcher), and the Amber Tank Liner coating. It's specifically designed to seal pinholes and prevent future rusting.

Unlike some polyurethane-based sealers, Caswell’s kit uses a superior two-part phenol-novolac epoxy that is completely impervious to modern high-ethanol fuels, MTBE, and fiberglass resins. It is mixed inside the tank and rolled around to coat everything thoroughly.

Another well-known industry standard that coats the inside of the tank, seals small pinholes, and stays slightly flexible. It is easily applied by pouring it in, rotating the tank to cover all interior surfaces, and pouring out the excess.

If you'd like, let me know:

• The material and size of your gas tank
• Whether there are actual pinhole leaks or just surface rust inside

I can help you choose which specific kit fits your restoration style best.

Yes. For a vintage motorcycle with a rusted steel tank, several companies make dedicated cleaning/sealing/lining kits:

• POR-15 — probably the easiest starting point. Their Motorcycle Fuel Tank Repair Kit is specifically sized for motorcycle tanks up to about 6 gallons and includes cleaner/degreaser, rust-prep, sealer, and patching material.

  POR-15 Motorcycle Fuel Tank Repair Kit

$79.00

• KBS Coatings — makes a Cycle Tank Sealer Kit with KBS Klean, RustBlast, and Tank Sealer. The kit is designed for tanks up to 5 gallons and seals pinholes and weld seams.

  KBS Cycle Tank Sealer Kit

$44.99

• Kreem — a long-established tank-liner product, available as a prep-and-liner combination.

  Kreem Fuel Tank Prep and Liner Combo Pak

$43.04

• Eastwood — also offers motorcycle-specific gas-tank sealing kits intended to remove internal rust and seal minor leaks.

  Eastwood Motorcycle Gas Tank Sealer Kit

$49.99

For a valuable vintage bike, I'd lean toward POR-15 or KBS, provided the tank is structurally sound. The preparation is more important than the brand: loose rust, old liner, varnish, and contamination need to be thoroughly removed before coating. POR-15 specifically says its sealer requires a clean, properly etched metal surface and won't adhere well to plastic components.

If the tank has deep pitting, numerous pinholes, or paper-thin metal, I'd consider professional tank repair/replacement rather than relying on a liner.

If you tell me the motorcycle make, model, year, and approximate tank size, I can narrow it down to the best kit for that particular vintage tank.

Restoring a vintage motorcycle gas tank requires a robust, multi-step process (cleaning, de-rusting, and sealing) to withstand modern ethanol-blended fuels . Several reputable brands offer all-in-one kits specifically sized for motorcycle tanks:

Widely regarded by professional restorers and vintage motorcycle builders as one of the most durable choices . Unlike single-component moisture-cured sealers, Caswell's Epoxy Sealer uses a two-part phenol-novolac epoxy mix. It is completely impervious to all fuels (including high-alcohol and race blends) and excels at bridging pinholes and sealing leaking seams.

A very popular 3-step system designed specifically for motorcycle and small engine tanks up to 5 gallons (larger kits are also available). The system includes *KBS Klean Go to product viewer dialog for this item. * (degreaser), *RustBlast Go to product viewer dialog for this item. * (rust remover/metal etch that leaves a zinc-phosphate protective film), and the *Gold Standard Tank Sealer Go to product viewer dialog for this item. * . It forms a tough, flexible silver metallic coating.

A well-known name in rust remediation. POR-15 Fuel Tank Sealer Go to product viewer dialog for this item. offers a comprehensive 3-stage kit (Cleaner Degreaser, Metal Prep, and the light-gray Tank Sealer). When applied strictly according to directions on a bone-dry surface, it creates a tough barrier resistant to modern fuels and alcohol additives.

One of the oldest names in the market, providing a 3-step wash and elastomer-based white liner kit. While historically common, opinions in the vintage community are mixed; many modern mechanics advise meticulous prep work with Kreem, as it can occasionally delaminate or soften if exposed to prolonged pooling or poor surface adhesion.

A quick tip for success: Whichever kit you select, surface preparation is everything . Any residual flash rust, moisture, or oil/varnish left inside the tank will prevent the liner from bonding, leading to peeling and clogged carburetors down the road.

Would you like help choosing between an epoxy-based sealer (like Caswell) versus a moisture-cured polyurethane (like KBS/POR-15) , or do you need a step-by-step walkthrough of the de-rusting and prep process?

For a rusted vintage motorcycle gas tank, the main suppliers of tank sealing/lining kits are:

• POR-15 — Their Motorcycle Fuel Tank Repair Kit is specifically made for small metal tanks and includes cleaner/degreaser, rust-prep/etching treatment, sealer, and patching materials. It is designed to stop rust and seal small leaks/pinholes.

  POR-15 Motorcycle Fuel Tank Repair Kit

$79.00

• KBS Coatings — The KBS Cycle Tank Sealer Kit is a three-step system (cleaner, rust remover/etch, and sealer) for motorcycle and other small fuel tanks. It is intended for tanks up to about 5 gallons.

• Caswell Plating — Known among vintage-bike restorers for epoxy-based tank liners, especially where a very durable fuel-resistant coating is desired. (Availability and product details vary by region.)

• Kreem — A long-established motorcycle tank liner system with cleaner/prep and coating products.

• Red-Kote — A pour-in fuel tank liner often used for rusted tanks and small repairs.

A few restoration tips:

1. Remove loose rust and old failed liner first. Most failures come from coating over contamination, varnish, moisture, or a previous liner that is peeling.
2. Check the tank metal before sealing. If the steel is paper-thin, heavily pitted, or leaking at seams, a liner may only be a temporary fix; welding or replacement may be needed.
3. Follow the prep steps exactly. These kits depend heavily on proper degreasing, rust treatment, drying, and curing time.

For a valuable vintage motorcycle where originality matters, many restorers favor epoxy-style liners such as POR-15, KBS, or Caswell because removing a failed liner later can be a difficult job.

If you tell me the make/year of the motorcycle and how bad the rust is (surface rust, flakes, pinholes, leaks, old liner present), I can suggest which type of kit is the best fit.