I am having trouble sealing my 4″ and 9″ mylars with my large heat sealer. Is there a trick to it to get out the creases so that the air can not slowly leak out?
• Inflate the balloon fully, including the neck. Hold at the open end of the neck with your right thumb and index finger; using your left thumb and index finger, squeeze, slide and smooth the neck working toward the balloon. Have your heat sealer on the lowest possible setting that will work and seal about 1/2″ from the flattened open end while keeping your left thumb and index finger right next to the balloon — you should end up with a long, flat neck. Hold down the heat sealer arm 2-3 seconds AFTER the light goes out, move 1/4″ closer to the flattened open end (still holding all the air in with your left thumb and index and reseal following the above procedure. By sealing closer to the end of the balloon, you can just cut off the neck right above the old seal and reseal the balloon if you ever need to. But, of course, you won’t have that problem anymore. Sometimes the pressure in the neck can cause the heat seal to come undone if you release your fingers immediately after sealing. T
