Hey all... I posted this to the PE site as well.. also posting here since I KNOW there's several Whispermat fans about.
So, I've been working on a pair of speakers, and have them nearly done. Got some of the vaunted Whispermat, and used 3M 77 spray adhesive.
Well, some pieces fell off under their own weight later.. and the next day, they all were barely attached. At first I thought it a combination of not enough spray on all surfaces, and that the dampening mat surface (I bought both the foam-dampening-foam type as well as the foam-dampening) seems slightly oily. Figured I should have wiped it with something to degrease it first.
But after 24 hours, it seems ALL the adhesive can be wiped off, and is just a gummy mess, rather than a glue. It's as if some chemical interaction has happened. Anyone run into this? Anyone using Whispemat have a good glueing suggestion? The foam-barrier-foam stuff is tightly glued, you will tear foam before the joint lets go, so its not like I got a bad can of spray cement... it's completely cured.
I've read Zaph's writeup on using Whispermat, and suggests 3M 90 spray works great. I didn't think that the somewhat cheaper stuff would do so much worse, but I guess there's some compatibility problem.
Well, there's always thumbtacks and the heavy duty stapler... ;-)
So, I've been working on a pair of speakers, and have them nearly done. Got some of the vaunted Whispermat, and used 3M 77 spray adhesive.
Well, some pieces fell off under their own weight later.. and the next day, they all were barely attached. At first I thought it a combination of not enough spray on all surfaces, and that the dampening mat surface (I bought both the foam-dampening-foam type as well as the foam-dampening) seems slightly oily. Figured I should have wiped it with something to degrease it first.
But after 24 hours, it seems ALL the adhesive can be wiped off, and is just a gummy mess, rather than a glue. It's as if some chemical interaction has happened. Anyone run into this? Anyone using Whispemat have a good glueing suggestion? The foam-barrier-foam stuff is tightly glued, you will tear foam before the joint lets go, so its not like I got a bad can of spray cement... it's completely cured.
I've read Zaph's writeup on using Whispermat, and suggests 3M 90 spray works great. I didn't think that the somewhat cheaper stuff would do so much worse, but I guess there's some compatibility problem.
Well, there's always thumbtacks and the heavy duty stapler... ;-)
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