Question: David Sharpe writes:  We have a flatbed printer and solvent printer and we are looking for the best magnetic product to use for Car Magnets. One of our clients just had some of the ones that we are using blow off of her car.

Answer: Unfortunately, this issue is not as uncommon as you would think, mostly because there are a number of possible contributing factors.  However, let’s start by addressing your question specifically.

When making magnetic car signs we first have to be concerned with the thickness of the magnetic sheet.  Its thickness is directly related to its strength (pounds of pull).  It has been universally accepted throughout our industry that the minimum acceptable thickness for automobile signs is .030”, also commonly referred to as 30mil.  Anything less than .030” may not provide the pounds of pull required to withstand the external forces an automobile sign is subjected to.
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