Making a silicone bladder


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chriscnf
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Hi guys I've decided that I need to move from Qualatex balloons to a silicone bladder.
I've got Smooth On rebound coming just because there isn't much available in NZ at the moment.
Its a three part mold and I've built fiber glass shells to go in the mold parts to correctly size the bladder.

I will mess around with some trials but I'm was a little bit confused about the right time to do second coats and joins last time I did this.
I was using dragon skin then and it seemed to go from runny to tack free without a good tack period to second coats and a complex join.

One thing I did learn last time is that acetic cure tube silicone sticks like s*** to a blanket with smooth on silicone for fixing seam flaws.
The idea is to make a thin patch with the smooth on silicone and then glue it on with the cheap tube silicone.

Any pointers would be massively appreciated...Chris
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chriscnf
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chriscnf - 1/10/2021 5:25:03 PM
Hanaldo - 1/10/2021 10:09:48 AM
Silicone will bond pretty well to itself if it is fresh. The fresher it is, the better it will bond. So I generally do the next layer as soon as the previous layer is firm enough to not disturb it when you apply the next layer.

In that case this should  a breeze...cheers Hanaldo...

Not quite a breeze but got a good result. I'm thinking about a release agent to help with getting the bladder out of the close mold and to extend its life.
The areas inside the product that I need to adhere epoxy to  are protected by peel ply so transfer of the release agent doesn't bother me too much.
Cheers...Chris

GO

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