I had to do that to my HF blast cabinet. Went to the hardware store and bought stick on closed cell weatherstripping and built up the original seal. No problems now and cheap to replace if it does wear out.buening said:I've had good luck with Black Beauty media as well. I too have one of those TP Tools blasting cabinets. Darn thing leaks sand everywhere though. I may have to take it all apart and use weatherstripping between the panels to seal them all better.