Please make sure you have prewashed your fabric without fabric softener. Any chemicals that the fabric was treated with may be interfering with the bonding process.
The HeatnBond may also be overheated. The adhesive will appear dark and glossy if this is the case. The adhesive may seep through the fabric, as well. Please make sure your iron is set to medium heat with no steam (do NOT overheat). Press and hold the iron for the instructed time. Extra care needs to be taken with FeatherLite and Lite products as those can be overheated more easily.
With that being said, thicker fabrics may require a few extra seconds of heat to properly adhere. We always suggest pretesting this product before applying to your final project to make sure you are comfortable with the application process and happy with the results.
For more tips on how to best use our product, we recommend watching our tutorial videos for HeatnBond UltraHold, HeatnBond Lite and Featherlite, HeatnBond Hem Tape, and HeatnBond SoftStretch. These are valuable for first-time users to better understand the product and its applications as well as seasoned pros to refresh your technique and ensure you are getting the best results from our HeatnBond products.