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Old 01-26-2010, 08:05 PM   #1
Bus Nut
Join Date: Dec 2006
Location: downriver, detroit mi
Posts: 794
Re: Silicone

that's one of the reasons that they use butyl or urethane based adhesives to bed windshields in, if you have a leak you can add more stuff to seal it up, same goes for household window "glazers" putty and plumbers putty.

As amazing as silicone products are, they are not the be all answer for some things.

One of my pet peeves is the excessive application of silicone gasketmakers by some so called mechanics during engine repairs without properly cleaning the parts for assembly.

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Old 07-21-2021, 11:16 PM   #2
Join Date: Apr 2021
Location: Canmore, Alberta
Posts: 17
Year: 2007
Coachwork: Freightliner
Chassis: C2
Engine: 907 Mercedes
Rated Cap: whole bunch
DO NOT use silicone on your skoolie for anything but a tub surround or sink back splash. If you use it for any external seal it will never be paintable. Just a little bit of silicone on the exterior can ruin the whole paint job as paint will not stay in the area you used the silicone and it will "fish eye" all over the place. Just as mentioned above use Urathane products. Every vehicle uses various forms of urathane to seal components (seam sealer, self leveling roof sealer, windshield & side glass adhesive).
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Old 07-23-2021, 01:43 AM   #3
Bus Nut
Join Date: Jun 2021
Location: Baja often, Oregon frequently
Posts: 341
Year: 1996
Coachwork: Our hot little grubbies...
Chassis: Ford CF8000 ExpeditionVehicle
Engine: Cummins 505ci mechanical
Rated Cap: Three RedHeelers
Based on a few decades of fumbling with sealers, silicone caulk hardens.
Along about the time of the first bump, the body flexes, the windows/vents/fans shift, and the bond breaks... necessitating a second/third/fifteenth layer of silicone caulk.
Which immediately breaks.
2003, for our ExpeditionVehicle, I seated my windows using Vulcum 116.
This's available in a few colors -- tan, white, gray -- so matching it to our 'almond' window-frames and tan rattle-can paint-job was a cinch.
Nearly two decades of bouncing up rough logger tracks and across rivers/deserts/California roads, and the stuff is still pliable.
No leaks.
For our ExpeditionVehicle, we built using a rigid commercial box engineered for a million miles of worse than we could throw at it.
Of course, we have zero-zero-zero holes in the roof [like every RecreationVehicle [spit]], so your experience may differ.
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