©2019 eCarGuides LLC ~ All Rights Reserved

Replacing factory tire sealant on a Porsche model without spare tire

Maintenance Interval: Every 4 years regardless of mileage

Dealer Cost: ~$100

DIY Cost: ~$10

Difficulty: Anyone can do it

Repair Time: 5 minutes

Overview:

Many newer Porsche car models such as the 911, Boxster, Cayman, and Panamera do not come with spare tires​. Instead, Porsche includes an air compressor and a "tire sealant" kit. In the event of a flat, you are supposed to empty the tire sealant into your tire, then inflate it to the correct tire pressure. Porsche recommends that owners replace the tire sealant every 4 years. In the above video from YouTube channel, Blinkerspot, you can see what happens to old Porsche tire sealant over time.

While you can purchase the Porsche brand tire sealant, it's going to set you back around $100. Instead, you can replace your tire sealant, which a commercially available product such as Slime. While tire sealant can help with a small puncture, it will not work on larger punctures or gashes. Additionally, use of a fix-a-flat type of tire sealant will require you to get your tire and wheel serviced immediately. If the tire sealant is left in the wheel for too long, it could damage your tire pressure monitoring system (TPMS) sensor and even corrode your wheel. Therefore, we actually recommend using a tire plug / repair kit over tire sealant if possible. Check out the rest of the article for instructions on how to use a tire repair kit and tire sealant.

Products we recommend:
Instructions:
In the above video from fixitsamo, you can get an overview of how to use a tire repair kit. This is a temporary fix, but for most punctures, this should be sufficient to get you to a professional tire shop. While we recommend this method, if you're unable to perform this method, the tire sealant method below is another option.
 
  1. First and foremost, pull your vehicle over into a safe, well-lit area that is out of the way of traffic.
     
  2. Turn on your hazard lights, so you can be seen and place your vehicle in park.
     
  3. Inspect your tires to locate the affected tire(s), then inspect the tire(s) to locate the puncture(s).
     
  4. Position your vehicle, so you can easily access the tire puncture.
     
  5. Put on a pair of gloves and use pliers to remove the foreign object.
     
  6. Take the t-shaped, spiral reamer tool included in the repair kit and add some lubricant. Then insert it into the puncture and clean out the hole by going up and down while rotating the tool.
     
  7. Now take the other t-shaped insertion tool (has an open end) and insert a repair string. Line up the repair string, so there open end of the tool is in the middle of the repair string.
     
  8. Insert the insertion tool and repair string into the puncture. Be sure to leave repair string exposed on the outside of the tire.
     
  9. Quickly pull the insertion tool, which should leave the repair string in place.
     
  10. Use the supplied utility knife to cut off the excess repair string.
     
  11. Connect your air compressor to your tire and inflate it to the correct tire pressure, which you can typically find on sticker located on your vehicle's driver's side door jam.
     
  12. Screw on your valve stem cap.
     
  13. Put everything away.
     
  14. You're all done. Just be sure to visit a tire shop ASAP.
In the above video from Slime Tire Sealant, you can get an overview of the procedure of using tire sealant. If you are not mechanically inclined, this is an acceptable method to patch up your tire. But, you will need to visit a professional tire shop shortly after if you want to salvage your tire and prevent damage to your wheel or TPMS sensor.
 
  1. First and foremost, pull your vehicle over into a safe, well-lit area that is out of the way of traffic.
     
  2. Turn on your hazard lights, so you can be seen and place your vehicle in park.
     
  3. Inspect your tires to locate the affected tire(s), then position the vehicle so the valve stem is at the 6 o'clock position.
     
  4. Get out your tire sealant and tire air compressor.
     
  5. Go to the affected tire(s), remove the valve stem cap, and screw on the bottle of tire sealant.
     
  6. Empty the full bottle of tire sealant into your tire, then remove the tire sealant.
     
  7. Connect your air compressor to your tire and inflate it to the correct tire pressure, which you can typically find on sticker located on your vehicle's driver's side door jam.
     
  8. Screw on your valve stem cap.
     
  9. Put everything away.
     
  10. You're all done. Just be sure to visit a tire shop ASAP.