Re: Styrofoam hardening ?
Posted: Mon Nov 02, 2020 10:15 pm
I've used PVA on styrofoam, and acrylic paint. You could create a paper mache covering using the pva glue if you wanted thicker and stronger protection.
https://forum.talkingmachine.info/
Is that Polyvinyl Acetate?AudioFeline wrote:I've used PVA on styrofoam, and acrylic paint. You could create a paper mache covering using the pva glue if you wanted thicker and stronger protection.
Yes white PVA wood/craft glue, dries white. I think you have different brands to where I am.Daithi wrote:Is that Polyvinyl Acetate?...
Curt A wrote: ↑Thu Oct 29, 2020 3:55 pmNow, I'm really puzzled that you are worrying about waterlogging... are you using this underwater?Daithi wrote:Yes that is another problem, I was thinking as a last resort of pulling a vacuum on it. But that has its own problems too. I have read that given time water can percolate into the spaces between the cells as happens at sea where styrofoam sometimes ends up wet and eventually becomes waterlogged after long periods.Orchorsol wrote:Styrofoam is closed cell, so it won't be possible to impregnate it as such.
Looks like coating it is the easiest way out though. How to build up a thick hard coat? Fiberglass, carbon fiber or just plain old paper applique like they did in the old days?
Just re-read this early post on the thread. I don't think styrofoam is very good as a sound-absorber, you will find there are other materials that are specifically made for this purpose that will probably work better (eg. sound-absorbant foams and woolen bats).Daithi wrote: ↑Mon Oct 26, 2020 10:06 pm The plan was to fill the box with hard styrofoam in two parts like a clamshell, then carve a horn out of the middle of the clamshell, and then soak superglue or liquid acrylic into it to a depth of ¼ inch forming the horn while leaving all the rest of the styrofoam as raw styrofoam to absorb any stray sounds and/or leaks.
I know its a bit weird.