You should always replace the tire after using sealant,balance is adversely affected,alignment will ultimately be affected.I live in Sarasota and had a flat in Charleston SC drove home with 50 psi,tire replaced next day by dealer.Cost $595 inc labor,but since I purchased tire insurance (Safetire)when I purchased the 997S I got a full refund. Don't drive on a repaired tire in a 997S,if you insist driving on repaired tires in high performance cars you may invalidate your principal insurance cover in the case of an accident if loss adjuster can link incident to the repaired tire. Also tell me if you are tracking the car so that I can avoid the circuit that day