+x

 

Hanaldo - 1/30/2021 9:55:41 PM

And you're not bleeding out too much resin without a perforated film between the peel ply and the breather? 

+x

 

Hanaldo - 1/30/2021 12:29:46 AM

Yeh its unfortunate that epoxy dries silicone out so severely. Ive tried Mann Ease Release 200 as well as Stoner E236, E455, A324, and E497. I wouldn't say I noticed any very real extension of the silicones working life with any of them, perhaps a few extra cycles with E497 and A324 but its difficult to say if this was due to the release agent or because I was using a more forgiving process. Really none of them prevent the interaction between the epoxy and the silicone, so the silicone still dries out. PVA is really what you would need, which of course won't work.

The good news is none of these transferred to the part, so I do still tend to treat all my silicone moulds just in case it does help at all. If you find something that definitely works to extent the life of the silicone then please let us know, I'd love to get indefinite usage from my rubber tools!

+x

 

chriscnf - 1/31/2021 2:57:26 AM

+x

 

Hanaldo - 1/30/2021 9:55:41 PM

And you're not bleeding out too much resin without a perforated film between the peel ply and the breather? 

Good question that...I'm pretty new at this so I appreciate you asking it. This is a complex three part closed mold and I let the resin get almost tacky before putting it together which helps with trimming and extensive seams. And I don't use a lot of pressure, just closing down the seam and compressing the fiber a bit.
The appearance is very good so I hope I'm not removing to much resin. 

+x

 

chriscnf - 1/31/2021 3:47:21 AM

Just out of curiosity, how many cycles do you expect from your bladders?