This EVA foam has a density of 38 kg/m3. It comes in sheets that are 600 mm x 600 mm (approximately 24″ x 24″) squares. Each sheet is coated with an industrial adhesive. Simply peel the backing and stick to another piece of foam. After 24 hours of curing time, you will have a very strong bond. This allows you to apply details without having to use additional contact cement.