The bottom insulation is a spray primer, based on shellac, alcohol and cellulose. The authentic amber aspect of the product gives the treated object a warm, soft and antique brilliance that can not be achieved with other products currently available. Especially suited as isolating base layer on caligene oak or exotic types (wengé, padauk,…). This isolating shellac underlayer is well suited for restoring or copying antique furniture. Ideal as base layer for a waxed finish