The correct options are
A water proofing treatments
B molding compounds
D insulating materials for electric motors
Silicones are used in many products.
Ullmann's Encyclopedia of Industrial Chemistry lists the following major categories of application :
Electrical (e.g., insulation), electronics (e.g., coatings), household (e.g., sealants for cooking apparatus), automobile (e.g., gaskets), aeroplane (e.g., seals), office machines (e.g., keyboard pads), medicine/dentistry (e.g., teeth impression molds), textiles/paper (e.g., coatings).
Hence the correct options are A, B and D.