48 Pack 12"X 12"X1" Acoustic Panels Studio Soundproofing Foam Wedge Tiles,

Is this product made of polyurethane foam (pu foam) or polyurethane sponge (pu sponge)?

Was wonderin they ecpand can i usr them

I have a 6 HP air compressor single stage twin cyl. Do you have a product to quiet it down?

If these are spray painted will they lose their noise buffering capability?