Essentially, if a product is inside the exterior moisture protection it is a controlled product (it must comply with the credit requirement). To elaborate: all materials that emit contaminants that have the potential to enter the indoor air will be considered as indoor sources of contaminants. Materials which have the potential to communicate their emissions to the indoor air include all indoor surfaces in contact with the indoor air including flooring; walls; ceilings; interior furnishings; suspended ceiling systems and the materials above those suspended ceilings; all ventilation system components in communication with the ventilation supply or return air; and all materials inside of wall cavities, ceiling cavities, floor cavities, or horizontal or vertical chases. As an example these materials include the caulking materials for windows, and insulation in ceilings or walls. Examples of materials that have little or no potential for communicating with the indoor air are those siding and roofing materials that are on the exterior side of the waterproofing membrane. Applicable Internationally.