silicon weather sealant around dc motor brushes/commutators 9

[electricpete]

I'd like to revisit this topic yet again.

Previous review:
thread237-9155
thread237-178054
thread237-224692
thread237-32685

http://www.morganamt.com/us/files/Morgan Carbon US/MaintenanceConcerns.pdf

DO NOT USE SILICONE SEALANT TO MAKE THE MOTOR WATERTIGHT

http://www.geindustrial.com/publibr...wal Parts|DCMotors|generic&wwparam=1367260697

Silicone, RTV, or Bathtub Seal/Caulking is not recommended for sealing DC motors

QUESTION 1 - Any further good references about this? Our repair shop said they wouldn't hesitate to use silicon sealant on a dc motor cover plate as long as it is not near Hydrogen sulfide like paper mmill. What is standard repair industry practice?

QUESTION 2 - What are alternative weather proof sealants? Something with thick consistency for example to fill a 1 / 16" gap?

I found the following alternatives, but don't know much about them.

http://www.morganamt.com/us/files/Morgan Carbon US/MaintenanceConcerns.pdf

“Urethanes, polyurethanes or elastomeric adhesive sealants are recommended for use around brush type motors.”

http://www.geindustrial.com/publibrary/checkout/DCMotors?TNR=Renewal Parts|DCMotors|generic

Titeseal
Titeseal is the preferred sealant used on waterproof motors to seal fits and bolts. It is non–hardening,
non–silicone. GE#8064200000.”

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(2B)+(2B)' ?

 

[Compositepro]

One additional important fact that I forgot to mention is that RTV silicones cure by reacting with moisture in the air. They skin-over in minutes but can take days or weeks to cure to any depths greater than 1/4".