Yes, CSI Pivot Ultra can be used on hardwood floor.
As with any aerosol or liquid, the drying time will depend on how heavily the product is applied. However, under normal circumstances, surfaces treated with CSI Pivot Ultra should be dry within an hour, two at the most.
CSI Pivot Ultra is not labeled for carpet beetles and would not be recommended. Instead we would recommend Nyguard Plus which is labeled for Fleas, Ticks, Flea Eggs & Larvae, Cockroaches, Dust Mites, Carpet Beetles and Lice.