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>> Home > Forum > Building Related > Silicone Sealant
Silicone Sealant
(1716 views)
Author Message
bikerjohn57
(Sub-Lieutenant)





Forum Posts: 34
5th Oct 2012 12:51  
>> Permalink
mdlbt.com/7861

Just a word of warning/reminder to anyone considering useing this
wonderfull stuff.
"YOU CANT OVERPAINT IT" paint or varnish will not stick to It.
If you wish to overpaint use a acrillic sealant this will "skin over"
when dry and then may be painted/varnished whilst still maintaining
a flexable seal, although not as good as silicone Its a trade off, as
a thin bead of acrillic will dry through.
Sorry If It seems Im trying to "teach mother to boil a egg"
but there may be someone out there who didnt know.
Regards to all
John

Gregg
(Fleet Admiral!)





Forum Posts: 212
5th Oct 2012 16:30  
>> Permalink
mdlbt.com/7862

You will also find that Silicone sealant, IF used In a constantly "wet" area will also fail and looses Its bond. Please only use this stuff sparingly and only use where It only gets damp or the odd bit of water splash. Some people use It to seal prop tubes to hulls, Highly risky In my opinion and wil, In the end fail and you will end up having to refit the prop tube all over again. My motto, "if you gonna do It, do It right, but first time!"


Best wishes.

Gregg
Secretary: Chasewater Model Boat Club.
http:chasewatermbc.blogspot.com/
"The chances of anything coming from Mars are a million to one they say...."
Gabby
(Chief Petty Officer)





Forum Posts: 4
7th Oct 2012 10:15  
>> Permalink
mdlbt.com/7871

SILICONE ALTERNATIVE. For all those who do not like silicone, try a polyuethane elastomeric sealant, like the Sikaflex range. Superior adhesive range between different materials. When cured virtually Indestructible. Can be used In aggressive enviroments, so an I/C engine room no problem. Potable so no contamination of water. Can be used under water. Can be sanded, though Idon't recommend. I prefer to use some spittle from the hand as a final smoothing agent before curing. Can be overpainted with any paint system. Downside, It's expensive, but you will not be buying by the box only a tube. From any good builders merchant or Amazon.
Keith