How To Seal Mylar Bags With Iron. I’ve always sealed mine with a clothes iron and it’s worked amazingly well and quick. Get as much of the air out as you can;
Get as much of the air out as you can; Stand the bags upright on a table; However, mylar bag sealers which are designed for this purpose are easier to use, faster, and they provide a more reliable seal than does a household iron.
Once filled, you can easily seal mylar bags in seconds with an ordinary clothes iron or a ladies’ flat iron hair straightener.
Put two of these strips at each corner of the opening when putting the bag in the sealer. It is easy to do this while the bag is standing up. Yes, the flat hair iron works great to seal a mylar bag. This how to video demonstrates how to seal mylar bags with a clothing iron.