Bonneville exhaust to silencer sealing compound ?

Well, I've had my 2015 Bonneville for just on a year now but has very low mileage (retired, fair weather rider !!!). I've upgraded my suspension to Hagon progressive springs and rear units and also fitted an SW Motech engine crash-bar (very neat design), Givi rear rack & top-box (rack also neat and with a design load of 10 kg whereas Triumph rack is half that. Bearing in mind the weight of a topbox, 5 kg load limit makes the Triumph rack unsuitable for topbox use. Not only that, but the Triumph rack (new) that came fitted on the 'bike had rust spots around a couple of the welds ! Refund given by dealership with no problem).

Time came for a service and to keep the two year warranty intact I booked the 'bike in at my local Triumph dealership (albeit anecdotal reputation of said dealership is not favourable !). The final drive chain was needing slight adjustment so I decided to do that job myself prior to the service. To be able to retighten the rear wheel spindle nut after chain adjustment (using a socket spanner & torque wrench) it is necessary to remove the offside silencer. I achieved this with a bit of a struggle only to find that some sort of jointing compound was betwixt the exhaust pipe and silencer. The substance was red and had a rubbery, elastic consistency. In all my years of playing with motorcycles I've not seen such a substance before. Although the sealant had been damaged somewhat during exhaust removal, I was able to refit the exhaust without there being any exhaust gas blowby on firing up the engine. However, the next chain adjustment will need new jointing material.

Now for the actual question for this post ! : Do any of the Forum members know what product is used for this assembly ? It was almost certainly applied during the 'bikes initial build at the factory rather than subsequently.

When I collected my 'bike from being serviced I asked what product was used for the silencer to pipe joint (by the way, 'bike only worked on for about an hour in the workshop, and little more than an oil & filter change and check on computer diagnostics with no errors resulting - cost £200. I used to have a BMW F800 ST, and the local franchised dealership provided much better value than this !). Service receptionist, whilst friendly, polite and attempting to be helpful didn't know. Bottom line is, on leaving the dealership, I still didn't know what product I should use (beginning to get my own 'non anecdotal' evidence now !).

I have a friend who used to race motorcycle outfits and he said him and his colleages would use fire retardent silicone sealant (such as can be bought from Screwfix) for exhaust pipe sealing, but if I'm able to get a purpose made product I would prefer not to compromise. Any suggestions will be greatly appreciated (and does anyone know what sort of temperatures are likely to be encountered in the exhaust pipe during engine use ? Building Sealants have different heat resisting properties I've discovered).

 

Mark, Hello. I was deliberatley vague on identifying the particular dealership in case it breached a Forum guideline (being relatively new to the Forum, I'm not familiar with all the rules so I played safe). I'll maintain my position on this as I'm sure (perhaps, maybe) many users of the dealership are completely satisfied and just say 'Brilliant deduction Doctor Watson' !

 

Thank you DozersDad for your suggestion of a product brand on my query. ScepticAl, I didn't realize Gun Gum was still on the market. I remember the product from my youth (and that was a very long time ago !) but me being somewhat OCD I was seeking a resolution (or is that a 'solution'. tee-hee) that wouldn't spoil the aesthetics of the 'bike, albeit under the footrest. I am very grateful for your input though.