Outlet and plug covers are typically made from plastics and thermoplastics, most commonly polycarbonate and polypropylene.
Outdoor options include weatherproof 1‑gang duplex covers with self‑closing lids, available for vertical or horizontal duplex receptacles; some models are UL‑listed for outdoor protection.
They use sealed, weatherproof construction and self‑closing lids that help prevent moisture, dust, and other outdoor contaminants from entering the receptacle.
Some switch and outlet plates are described in listings as fire‑resistant, heat‑tolerant, or flame‑retardant. The results do not list specific test ratings or standards for those claims.
Dimensions vary by product. Example listings include: 2.63 × 4.23 × 0.77 in; 4.03 × 2.68 × 0.94 in; 4.61 × 4.53 × 0.23 in; 5.27 × 3.51 × 0.25 in; and 2.7 × 7.8 × 3.9 in.
Child plug protectors are removable, reusable pressure‑mounted covers (no adhesive) that block unused outlets to help prevent fingers or objects from entering; they are commonly sold in multi‑packs (for example, a 36‑pack).
Finishes mentioned include matte, burnished, and glossy/high‑gloss surfaces; some listings highlight an easy‑to‑clean glossy finish.
