Here are the patch adhesion instructions should you preferto complete:

Instructions:
Heat N' Seal™ Instructions for Use:
To achieve a durable adhesion, the base material must be heated to removeexcess moisture in heat press - prior to the application of Heat N Seal
J (I)-Type . 340°F  medium pressure  about 10-15 Sec. with a HeatPress          

To achieve a durable adhesion, the base materialmust be ironed to remove excess moisture from fabric - prior to the applicationof Heat N Seal if g household Iron

Heat from underside of fabric (inside out) onceironed on front of fabric for 10-15 seconds if using iron with firm pressure,no side to side movements **(Iron setting tomax your fabric can stand)**

Material: 100% copolyamid · suitable for industrialgarments,   washable up to 205° F · fast to dry cleaning  canonly be applied with a heat press · strength: 73 µ, 80 g/m2 
Suitable for industrial garments, washable up to 205° F
All values stated are averages and have to be adapted to the thickness and theheat carrying capacity of the specific cloth. You may also vary temperaturesand period. A rise in temperature will result in a shorter period required.

Step 2. Post-Production Washing Tests
Full adhesiveness is reached after 48 hours, complete wash tests after thisperiod.

Wash with like colors
Cold setting wash, dryer on timed dry low setting up tp 30 min. per item as peritem label of clothing instructions.
Do not use bleach or fabric softener on item being washed.