Safe silicone These are silicone. Smooth interior: The interior of these is smooth, so the resin is smooth and flat without uneven flaws. powder,liquid resin dyes, dried flower, cards with /pretty patterns or other accessories can be added to the mold making to make the creation more diversified. The silicone photo frame mold is used to make photo frames and save some meaningful photos. Package includes: 1Set x Photo Frame Mold with Base Bracket Mold