Slime Smart Spair Flat Tire Repair Kit 50107 review

Slime’s Smart Spair Flat Tire Repair Kit 50107 joins a 12-volt compressor to a 16-ounce bottle of emergency sealant. The manufacturer presents it as a multi-step alternative to changing a spare: remove the valve core, apply sealant, reinstall the core and inflate. That makes it materially different from a small top-off compressor and from the later Smart Spair Ultra kits, which use a sealant bottle installed in a compact case.

What comes in the 50107 route

The exact product page identifies the Smart Spair 50107 and says it includes the pump, 16 ounces of sealant, a 0–60 PSI dial, a 12-volt plug, an LED, a quick-connect hose and adapters for balls and other inflatables. The manual adds useful limits: it lists 0.60 CFM at zero PSI, a 9.2-foot power lead and 9.6 feet of total reach. Its 15-minute inflation claim is tied to a P195/65 R15 tire from 0 to 35 PSI. Those are manufacturer specifications and a single scenario, not an independent fill test or a general time estimate.

The dial face is not a maximum working-pressure rating, and Slime does not state an accuracy tolerance. Use a separate reliable gauge to verify the tire, and use the pressure on the vehicle placard or owner’s manual when the tire is cold. The instructions describe manual on/off control rather than stopping at a selected target. This is not the right choice if a preset shutoff is essential.

The sealant process takes preparation

The manual’s sequence is explicit: place the valve near the top of the tire, slowly remove and hold onto the valve core, allow the tire to deflate, remove the puncturing object if possible, dispense the recommended amount of sealant, replace the core and inflate. Afterward it directs the driver to travel two miles, stop to verify the puncture has sealed and recheck pressure. This is a temporary emergency operation, not a tire-shop repair. Slime says its formula addresses tread punctures up to one-quarter inch and must be removed within three days or 100 miles. The exact product’s instructions restrict passenger-car radial repairs to the tread and warn against repair at the bead, sidewall or shoulder or on major tire damage.

The pump can also be used for air-only inflation, which the manual treats separately from injecting sealant. That distinction matters if the vehicle only needs a pressure correction: do not assume every turn-on automatically dispenses the sealant. Confirm the 50107 bottle and its closure are present, intact and appropriate to the intended emergency use, and verify a replacement refill’s exact part number rather than substituting a visually similar cartridge.

Outlet, operating time and hose

The instructions require a 12-volt outlet rated for at least 15 amps, recommend running the vehicle engine, and warn not to start a vehicle with the inflator already plugged in. They caution that the body can become hot, set a 15-minute maximum continuous run, call for approximately 25 minutes to cool and say not to leave it unattended. Operate in an open, well-ventilated place away from combustible vapors; the exhaust warning rules out a closed garage with the engine running. A nominally familiar socket is not enough if the vehicle manual rates it below the pump’s requirement.

The manual and product page describe the hose as quick-connect. Slime says that 50107s may have either an older green lift-to-lock lever or a newer black down-to-lock version. Do not guess from a neighboring pump or seller photo: check the physical hose head and follow the instructions for that version. The 9.6-foot total reach includes more than the power lead; it is not a promise that the cable alone reaches all four tires.

Who should compare it—and who should not

The 50107 is a source-supported candidate for an owner who wants an emergency puncture kit with a 12-volt inflator and is comfortable with the valve-core/sealant sequence, supervised manual inflation and the subsequent tire-shop visit. The maker also lists ball and inflatable adapters, but supplies no low-pressure accuracy range; a tire scale does not establish a safe sports-ball target. Stay with the item maker’s pressure guidance and monitor soft items closely.

Compared with the Emergency Roadside Kit 50154, the 50107 has a simpler flat-tire bundle rather than jump cables and a roadside signal; its core-removal and 16-ounce sealant procedure differs from the 50154’s Thru-Core procedure. Compared with the one-touch Ultra 50158, it makes the repair workflow more manual and has different reach and package details. The catalog’s 15-minute claim cannot rank these products because the Ultra claim uses its own named tire scenario, while the 50107 example is a different setup. Check the exact part number and package. This is a documentation-based assessment, not a hands-on test, measured fill result, promise of tire compatibility or recall clearance.