I didn't mean to imply that the old method was outdated, just that some may not have seen it. Anyway if you wanted a better damped panel I would suggest laminating two sheets with polyurethane adhesive. If it helps you could get away with thinner panels to begin with.
^ That is something I want to try when I finally make new woofer cabinets. There is a product for use between gyprock sheets for room deadening that I saw on TV once, and I don't remember what it is called. Very thin and you make a sandwich. always wanted to give it a try between a couple of sheets of plywood. Also have seen some sort of glue (green glue??) is that the polyurathane Allen?
Tony.
Tony.
I would like to say I very much appreciate the help from this community. Beers are on me if you get to Montana.
Now, that's what I'm talking about 🙂
I've used two types. The first type I used when I rebuilt my bathroom. It feels a little more solid than the silicone I use on aquariums. The second type feels a little more like marshmallow only not quite that soft.
Both did a good job, as noticed when dropping a hammer on tilted panels. You should not put it on too thick or the panels won't cause the needed shear forces in the adhesive. I used a tile adhesive combed trowel to ensure a consistent coat, then applied even pressure and a little movement of the upper panel to distribute the adhesive.
Caution: anything this stuff sticks to, you'll have a challenge getting it off. Even your fingers. Also, they say the gasses that come off this as it cures are bad but you can't tell that by smell.
Some have used that, I don't know what it's called. The polyurethane I found at Bunnings. It came as a cardboard cartridge that you use with a dispenser gun.
I've used two types. The first type I used when I rebuilt my bathroom. It feels a little more solid than the silicone I use on aquariums. The second type feels a little more like marshmallow only not quite that soft.
Both did a good job, as noticed when dropping a hammer on tilted panels. You should not put it on too thick or the panels won't cause the needed shear forces in the adhesive. I used a tile adhesive combed trowel to ensure a consistent coat, then applied even pressure and a little movement of the upper panel to distribute the adhesive.
Caution: anything this stuff sticks to, you'll have a challenge getting it off. Even your fingers. Also, they say the gasses that come off this as it cures are bad but you can't tell that by smell.
OK sounds like some experimenting could be useful 🙂 I like the idea of a constrained layer made with bamboo ply and possibly something else.
Trying to search for the stuff I saw on a diy show on TV, I didn't manage to find it, but I did find this https://www.pyroteknc.com/dmsdocument/100/SUBDUE-X-TDS-315X-IP.pdf
I'm guessing it is expensive though!
Tony.
Trying to search for the stuff I saw on a diy show on TV, I didn't manage to find it, but I did find this https://www.pyroteknc.com/dmsdocument/100/SUBDUE-X-TDS-315X-IP.pdf
I'm guessing it is expensive though!
Tony.