I put an fmf q4 on my wr250r and on the directions it said to use high temp silicone to seal it where it meets the header. I have tried every permatex color, called fmf multiple times, and tried other exhaust sealant options made for cars but nothing has worked. I apply the permatex and wait 24 hours or more but it just turns into goo the first ride after applying it. The people at fmf keep just telling me to try (x) color and I have been but now that I've tried every color permatex they told me to use Honda bond. I am going to try the Honda bond as soon as it arrives in the mail but I am sure that it will not work since none of the permatex would and the honda bond is only good for a much lower tempurature. I have no idea why it's not working for me or what to do. Does anyone have any advice please? Thank you for any help.