If using a patch glue, make sure to follow the
instructions on the packaging. Some require ironing the patch to
melt the glue and adhere the patch.
For this type of adhesive, spread the back side
of the patch with glue and place it on your project. Next, lay an
ironing cloth over the patch and iron until the glue is completely
heated. Allow the glue to
cool overnight before testing to see how well it stuck.