The short answer
If you're picking one for the trunk of your daily driver, get the Boulder Tools Heavy Duty Kit. If you're packing for a trail rig, overland build, or expedition, get the ARB Speedy Seal Series II. Both kits will plug your tire — the difference is everything around the plug.
Side-by-side comparison
| Feature | Boulder Tools | ARB Speedy Seal Series II |
|---|---|---|
| Price | $35–$45 | $60–$80 |
| Plug count | 30 brown self-vulcanizing | 40 brown self-vulcanizing |
| Reamer / insertion handles | Forged steel + rubber grip | Forged steel + rubber grip |
| Case | Hard plastic, glovebox-sized | Heavy-duty case, latched |
| Tire pressure gauge | No | Yes |
| Valve cores / caps | Limited | Full kit included |
| Gloves included | No | Yes |
| Best for | Daily driver, trunk kit | Overlanding, off-road |
| Amazon rating | 4.8 / 5 | 4.7 / 5 |
Tools and plugs
Both kits use forged-steel reamer and insertion tools with rubber-overmolded grips, and both come with the brown self-vulcanizing string plugs that are the professional standard. Side by side, the actual reamer and insertion tools are functionally equivalent — we couldn't tell the difference once they were in our hands. Both have held up to dozens of plug installations during testing without forming burrs or losing grip.
ARB ships 40 plugs versus Boulder Tools' 30, which is a small win for the ARB if you're going to use the kit a lot. For most drivers, you'll never use more than 5 plugs in the lifetime of the kit, so this difference is mostly academic.
The case is the real difference
The Boulder Tools kit comes in a fitted hard-plastic case roughly the size of a large hardcover book — perfect for a glovebox, a seat-back pocket, or a tool drawer. It's not an outdoor case; it's an organizer.
The ARB Speedy Seal Series II case is a different animal. It's overbuilt — secure latches, denser plastic, designed to live in a roof rack or behind a 4Runner's third row and bounce around without popping open. If you're equipping a daily driver, that's overkill weight and bulk. If you've ever had a Pelican-style case knocked open in a UTV, you know why ARB built it this way.
What's in the box
This is where ARB earns its $20–$35 premium. Both kits include reamer, insertion tool, plugs, knife, and basic accessories. ARB adds:
- A pair of work gloves (you will get rubber cement on your hands without them)
- A tire pressure gauge (so you actually know what pressure you're inflating to)
- A full set of valve cores, valve caps, and a valve core remover
- Soapy-water bottle for finding leaks
- Cleaning rag and brush
Each of those things you can buy separately for a few bucks. Together, in one organized case, they're the difference between a 5-minute trail repair and a frustrating roadside scavenger hunt.
Which should you buy?
Buy the Boulder Tools kit if: You drive on pavement 99% of the time, you want the cheaper of the two, and a glovebox-sized kit is what you have room for. Check Boulder Tools price
Buy the ARB Speedy Seal if: You go off-road, you carry a full recovery kit, you want the gauge / valve cores / gloves all in one case, and you're willing to spend the extra $20–$35 for the convenience. Check ARB Speedy Seal price