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<blockquote data-quote="turf3" data-source="post: 570166" data-attributes="member: 8105">I guess one can adhere the sleeve to the neck.&nbsp; Is RTV silicone effective as an adhesive for cured silicone rubber?&nbsp; (Genuine question here.)I have already posted, and been excoriated for doing so, that soft elastomers like silicone are the very devil to machine.&nbsp; About the only way to size these silicone sleeves, or any other material like them, is going to be to freeze in liquid N2 and then work fast.&nbsp; Real fast.&nbsp; The hope of course is that the very softness of the silicone rubber means sizing won&#039;t be needed.&nbsp; I suppose that&#039;s the idea for not needing to make the OD of the sleeve cylindrical when installed.Now I have some experience with these very low-durometer elastomers and another characteristic is that they are VERY &quot;sticky&quot;.&nbsp; Coefficient of friction is very high.&nbsp; Shove a mouthpiece onto one of these without lots of an appropriate lubricant, and you can expect it&#039;ll be holy you-know to get it back off without peeling it off the neck, or worst of all getting it rolled up or folded over itself inside the bore, putting you into the position of &quot;Can&#039;t go further on, can&#039;t go back either&quot;.&nbsp; So you&#039;d better keep that bad boy lubed up.Of course, the best lube is probably a silicone lubricant, which will also mean that any surface that gets contaminated with it will require extensive cleaning if you ever want anything to stick to it again.&nbsp; LIke, say, when you decide to just go for the $15 it costs to have the local shop install a neck cork.Now considering that you can solve the &quot;different IDs of mouthpieces&quot; issue with PTFE tape ($6.99 for a roll), or a piece of paper wrapped around the cork ($0.00 for whatever piece of paper&#039;s in your wallet today - old gas receipt, etc.), I&#039;m going to agree that this is a solution in search of a problem.&nbsp; But what do I know?</blockquote>

[QUOTE="turf3, post: 570166, member: 8105"] I guess one can adhere the sleeve to the neck. Is RTV silicone effective as an adhesive for cured silicone rubber? (Genuine question here.) I have already posted, and been excoriated for doing so, that soft elastomers like silicone are the very devil to machine. About the only way to size these silicone sleeves, or any other material like them, is going to be to freeze in liquid N2 and then work fast. Real fast. The hope of course is that the very softness of the silicone rubber means sizing won't be needed. I suppose that's the idea for not needing to make the OD of the sleeve cylindrical when installed. Now I have some experience with these very low-durometer elastomers and another characteristic is that they are VERY "sticky". Coefficient of friction is very high. Shove a mouthpiece onto one of these without lots of an appropriate lubricant, and you can expect it'll be holy you-know to get it back off without peeling it off the neck, or worst of all getting it rolled up or folded over itself inside the bore, putting you into the position of "Can't go further on, can't go back either". So you'd better keep that bad boy lubed up. Of course, the best lube is probably a silicone lubricant, which will also mean that any surface that gets contaminated with it will require extensive cleaning if you ever want anything to stick to it again. LIke, say, when you decide to just go for the $15 it costs to have the local shop install a neck cork. Now considering that you can solve the "different IDs of mouthpieces" issue with PTFE tape ($6.99 for a roll), or a piece of paper wrapped around the cork ($0.00 for whatever piece of paper's in your wallet today - old gas receipt, etc.), I'm going to agree that this is a solution in search of a problem. But what do I know? [/QUOTE]

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