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I think that it is a product with excellent cost performance among numerous deadening related materials. There is somewhat anxiety about the adhesive strength of the sheet, but if you construct and use it under the right conditions I think that there is no problem.
I used it for the sound insulation of the door, it is very beautiful Is it possible to weigh the sound-absorbing sheet adhesive a little more? I think? I think that if you make the backing paper a bit more soft it will be easier to stretch in a narrow place.