Parafilm is a sealing film, it’s made from a blend of plastics and paraffin wax; making it stretchable, moldable, waterproof, odorless, semitransparent and self-adhering giving it a wide range of uses in labs. In mushroom growing, we use this as a way of sealing agar dishes to keep them sterile. It’s also used around bottles and master slants. It’s pretty straight forward to use Parafilm. Take a piece, stretch it, work it around your dish and stick it to itself.
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