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I am interested in using this filler to make some non-resonant speaker baffles. In the video Matt does not say what the appropriate ratio of PoP:PVA is. Can anyone advise?
Posted : 10/03/2025 10:33 am
The mix ratio is usually stated on the PVA depending on the manufacturer and use-case if you get the builder's types. Art supply PVA is the same stuff but probably more expensive and it'll lack those instructions.
A quick google didn't really tell me much but when I've used it for fixing holes in walls where adhesion and strength were necessary (plain gypsum dries in to a crystal form which is powdery and soft) I typically dilute the required amount of water with about 50% builder's PVA. You can use 100% strength PVA (which is essentially a plastic that dissolves in water) or use the thinner stuff. You don't need a massive amount to turn dry plaster from that crumbly mush into something as tough as a brick. 🙂
You don't need to water down the PVA but it's a lot easier to mix with the plaster powder if it's full strength.
Take everything I say with a pinch of salt, I might be wrong and it's a very *expensive* way to learn!
Posted : 10/03/2025 3:05 pm