havin some trouble with my exhaust system, the de-cat to silencer part just does not want to seal. i have tried the s**t fire gum and that was just a waist of time as it just set hard then crumbled away, tried a high temp silicone we use at work and that did seal for about a week and now im back to it blowing! is it something im doing wrong? i am joining the de-cat and silencer when it is off the car then fitting it to the car in 1 piece. or can the rubber mounts have worn so there is to much movement in the exhaust which is breaking the seal. is it worth trying the loctite silicone or just get it in the garage.