[Amps] bonding plastic chimneys

[John T. M. Lyles]

Hey Arne (and gang)

Would punching a couple of holes (say 3) and then using short 4-40 
nylon screws and nuts work? Both for silicone or PTFE sheet. Maybe a 
small bead of clear silicone RTV over the seam to make it leak tight 
before tightening the screws.

73
John
K5PRO


>Looking for best method to bond silicon rubber sheet 1/8 and 3/16 thick for
>tube chimney.  About 4 inch id.  Have heard this is not easy task.
>
>For TEFLON sheet 0.030 thick what is best method for same 4 inch id.  Was
>given sample piece 15x36 inch x 0.030 thick, price was right.  I know TEFLON
>is difficult to bond.
>
>Chimney lengths will vary from about 2 to 6 inches in length.
>
>73 de Arne N7KA