Pre-wash your fabric. Even if you don’t intend on washing the finished product, you want to wash off any finishes that may be on the fabric. Do not use any fabric softeners.
Whenever you are working with iron-on interfacings, always make sure you test the adhesive on a scrap piece of whatever material you are working with before starting a larger project.
Preheat iron to medium heat, do not use steam when adhering vinyl.
Peel away the protective paper and put it to the side. Place the vinyl, sticky side down, onto the top of your material or whatever side you want to be laminated. Then put the protective paper on top of the vinyl with the waxy side facing down.
Always use the protective paper as a barrier, do not touch the iron directly to the vinyl.
Lightly run the iron all over the surface of your project to warm the adhesive slightly and make sure that everything is in place. Firmly press and hold the iron on the protective paper for 8 seconds. Move the iron over slightly, so you are just overlapping that last area you worked on and repeat until the entire surface is laminated.
Flip the project over and press and hold iron on the back of the fabric for an additional 4 seconds. Repeat until entire surface has been heated.
If you need to, at any point, you can use a press cloth or parchment paper.
If you are laminating both sides of the fabric, now is the time to repeat the process on the other side. Make sure you are being mindful about not touching the iron directly to the vinyl.
Allow it to cool completely before sewing or using the material.
When needed, wipe clean with damp cloth.
If you absolutely have to, you can wash on gentle cycle and line dry. If any peeling or crinkling occurs, cover the vinyl with parchment paper and re-iron.