TLDR; Step By Step
1. Clean application surface.
2. Remove decal from backing slowly.
3. Apply decal on surface.
4. Scrape hard with a thick and rigid flat edge.
5. Remove transfer tape from decal slowly.
Note: NEVER wipe the decal with a towel. Avoid scrubbing or rubbing the decal when cleaning. Wash with water touchlessly and let it air dry.
Temperature info
The ideal temperatures for applying a decal is anywhere between 60-90°F / 16-32°C.
Anything below or above can and will negatively affect the effectiveness of the adhesive and make application very difficult or even impossible.
Aftercare
If the decal is on a vehicle, you can wash the decals as much as you want but remember to NEVER wipe it down with a towel, as they are more coarse and sometimes the fibers can get caught on intricate parts of the decal and can tug and ruin the decal adhesive. Just carefully dab dry the surrounding area or let it air dry.