I agree with GDC...no sealant ever...you tire guys will hate you...create's a mess. Tire stores have their own method of putting the nitrogen in...so it is mostly nitrogen...don't ask me on rims....I pondered that for so long I just put new tires on the stock rims...LOL do the resets....and welcome aboard...keep reading...there is weeks of info on here for you to sort thru...