WE HAVE SOME BEAD SEALER AT WORK , WE FIT TYRES ITS REAL BLACK CRAPPY STUFF THAT SEALS THEM REALLY WELL , THAT WUD DO IT I RECON TAKE WHEELS OFF AND POUR WATER ON THE RIMS AND SEE IF BUBBLES APPEAR IF SO THEN ITS BLACK GOO TIME , U CUD ALWAYS GET SOME GREEN GOO THAT STOPS PUNCTURES I RATE IT VERY HIGHLY , YOU LET TYRE DOWN PUT THE GREEN GOO IN THROUGH THE VALVE THEN REINFLATE DO ALL 4 THEN NEVER SUFFER PUNTURES AGAIN ITS AWSUM USED IT ON MY GIXER WHEN I HAD IT