Elmers - Model & Hobby Cement - Elmers Model & Hobby Cement provides quick bonding of plastic to plastic and is ideal for polystyrene model plastic. This convenient and fast drying cement is water resistant and recommended for indoor use. This cement will not shrink when dry and can be painted. It dries clear, is non-flammable and sets in just 30 seconds. It is the perfect adhesive to have on hand for all your model and hobby projects!