Ensure best results and decal longevity by applying to a clean surface
Use an alcohol swab or window cleaning product to clean the surface before attempting to apply the decal...and make sure the surface is completely dry before applying the decal.
Make sure the surface has warmed to at least 50 degrees.
Make sure the decal has not been sitting in a hot car or exposed to the sun.
The decal will be more difficult to work with if it is too warm and pliable...the ideal ambient temperature is about 80 degrees.
Be certain about where you want your decal applied.
Once you've applied it to a surface, the decal can't be moved or adjusted.
You might consider "test fitting" the decal before you permanently apply it. You can "tack up" the decal while it is still pressed between the pre-mask and the backing paper, using a piece of tape.
Notice that the tandem image is NOT parallel with the bottom edge of the bottom edge of the pre-mask and the backing paper.
You might want to tilt the decal up a little bit at the front to ensure it looks like the tandem is traveling straight and level or even slightly uphill.
You can also trim the pre-mask and backing paper to set a straight edge before you apply it. Just be sure to leave a slight margin around the decal.
Be forewarned, if you apply the decal to a power rear window, it is likely that the decal will be damaged as it is moved back and forth across the rubber gasket seal.
MOST IMPORTANT TIP: Be patient and careful in the planning and application of your decal. Some glass surfaces, such as specially-tinted rear windows on SUVs, will be resistant to the adhesives. With a little bit of patience, you will be able to get the decal applied, but remember, if a surface doesn't seem to want a decal to stick to it, there's usually a reason.
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