Z
zook250
New member
has anyone ever tried this as a absorber/diffuser? it has the appearance of sponge toffee. ie. crunchie bar, yellow inside. it is made by firestone and is used as a rigid insulation on building exteriors. it is usually foil backed, but the foil can be peeled off. it comes in all thicknesses.
we have sheets of this stuff at work that has been sitting in a shed for years.
we have sheets of this stuff at work that has been sitting in a shed for years.