Cadillac 2008 CTS - Manual (Page 377)

The sealant can only be used to seal one tire. After
usage, the sealant canister and sealant/air hose
assembly must be replaced at a dealer/retailer.
See “Removal and Installation of Sealant Canister”
later in this section.
Check the tire sealant expiration date on the sealant
canister, if it has expired, see your dealer/retailer for
a replacement.
Using the Tire Sealant and Compressor
Kit to Temporarily Seal a Punctured Tire
Follow these directions closely for correct sealant usage.
1. Do a safety check before proceeding. See If a Tire
Goes Flat on page 5-83.
2. Inspect the damaged tire. The sealant cannot seal
sidewall damage, large punctures, or a tire that has
unseated from the wheel. See Roadside Service
on page 7-6.
3. If an object, such as a nail, has penetrated the tire,
do not remove it.
4. Place the sealant and compressor kit on the ground
and unwrap the sealant/air hose (G) from the
compressor.
5. Remove the valve stem cap from the flat tire by
turning it counterclockwise.
5-95