The main difference between 651 and 631 is going to fall in the adhesive on the vinyl and the finish on the vinyl. Both are calendared films and can be used both indoors and outdoors. Oracal 631 has a matte finish on it - meaning it does not have the glossy sheen to it, it also has a lighter adhesive so it is best used
When to Use ORACAL® 631 & ORACAL® 651
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Oracal 651 12x5yd. Roll
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