Seals, Gaskets, and O-Rings: Match the Right Replacement to Fuel Cans, Trucks, Cookers, and Engines

Seals and gaskets are small parts with one big job: keeping fluids, pressure, and air where they belong. The hard part is that a seal that works on a truck reservoir won't help a pressure cooker, and a silicone ring meant for a kitchen lid has no place on a small-engine head. Instead of searching by category name alone, you need to match material, shape, application, and the exact size of the part you're replacing. The four parts here show how different those choices can be.

Quick Take

Prices for these four replacements run from $4.95 to $37.10, and their intended jobs are very different. The table below shows where each one lands on that range. Use your specific failure point as the starting point: a gas can cap needs a fuel-friendly gasket, a pressure cooker needs a silicone ring, and an engine needs a matched set.

Listed Price Comparison

Decision Matrix

Product Notes

Jerry Can Replacement Gasket for 5-Gallon Military Cans (3-Pack)

If you need to seal a 5-gallon metal can with a screw-on cap, this three-pack is built for that job. The gaskets are 1/8-inch thick nitrile rubber and are gasoline and diesel friendly, so they make a practical choice for fuel storage. The pack gives you two spares, so one can be on the can, one in the toolbox, and one ready to go. It is not the piece for a spout, though; the fit is for screw-on caps. If your can uses a pour spout, this gasket is not the match.

Automann 575.1078.2 Power Steering Reservoir Replacement Gasket Ref# FGQ79699

This gasket targets a power steering reservoir and fits Kenworth T660 and Peterbilt 379. It also carries several OEM numbers, including NMCQ79699, Q79699, and FGQ79699, which helps when you are trying to verify a part before ordering. It is a single replacement gasket rather than a multi-piece set. Because universal fitment is not offered, it is not a general-purpose gasket for any reservoir. If your truck is one of the listed models and you need a direct replacement, this is the most targeted option of the four.

Pressure Cooker Sealing Ring Replacement Gasket

This silicone ring comes with a 22cm size designation and is meant for pressure cookers. It is made from food-grade silicone, is heat resistant, and is designed to keep the cooker airtight, which is what you want when a lid no longer seals firmly. It is portable, so it is a small part that is easy to keep as a spare. The single size marker is the trade-off: it points to a 22cm fit, so it is not a universal replacement. Match it to your lid's diameter before buying. For a 22cm pressure cooker, this ring is a straightforward match.

Rotary Brand Replacement Gasket Set 12314

This Rotary Corp set fits Honda GXV160 and GCV160 engines and crosses to Honda part numbers 06111-ZE7-406 and 061A1-ZE7-801. If you are doing a gasket refresh on one of those engines, a matched set is more convenient than collecting individual seals. That specificity is the limitation: it is tied to one engine family. It is not a general-purpose set for every small engine. If your engine is one of those two Honda models, this set is the most direct way to get the gaskets you need in one order.

Final Recommendation by Use Case

Start with the specific leak and work backward from there.

• If the leak is at the cap of a military can, the Jerry Can Replacement Gasket 3-pack is the one to start with.
• If the leak is from a truck reservoir, the Automann 575.1078.2 gasket is the narrowest match among the four.
• If the pressure cooker lid won't seal, the Pressure Cooker Sealing Ring is the silicone replacement to check.
• If you are working on a Honda GXV160 or GCV160 engine, the Rotary Brand Replacement Gasket Set 12314 matches the Honda part numbers for those engines.