The Basic Guide to Sandpaper Grit

When a project calls for sanding, one must confirm the correct materials are being used. Reason being is due to the different sizing, backing and grit of the sandpaper. But, how can we identify what type of sandpaper is best? Subjected to the work needed for your project, grit size will come into play. Thus, we must make note that sandpaper is measured by its grit size while others are measured by both the grit and grade of the backing. When buying your sandpaper, check the item to confirm it states the pressure sensitive adhesive (PSA) or the grit and size number. This will help when deciding which one is best for the project at hand.

 

123493-smlSandpaper Grit Sizing: If you are looking to remove a previous material such as gelcoat; begin sanding your surface with a 150 grit or lower. A low grit number determines the coarseness of the sandpaper which will give you the ability to remove materials and coatings. Sandpaper with a grit number in the 200’s and higher would be great for finishes such as buffing, polishing or the  removal of small scratches. A high grit number is equivalent to how small the grains are which will allow you to smooth the surface.

 

 

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Sandpaper Weight Grade: One may see grade letters ranging from A-E which represents the durability of the sandpaper, where E is the strongest. For example, (based on the figure above) the red Mirka Royal 40 grit disc would be ranked as the most durable, next the Mirka Bulldog 120 grit Gold, followed by the gray Mirka Bulldog 400 grit Gold .

 

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Here is a great tip!

If you are looking to conduct a wet or dry sanding, the  sandpaper coating must be waterproof. An abrasive that is waterproof will last you longer with end results you’re aiming for in a wet/dry process.

Product Spotlight: OEM Sandpaper

oem-sandpaperA product that we don’t often talk about here at FGCI is sandpaper. Sandpaper is used with nearly every job because you need to treat the surface before applying most resins, gelcoats and paints. You also use sandpaper to get any old resin, gelcoat and paint off of your surface before applying a new coating. So, with all this use, you need a product that is inexpensive, but most of all; reliable.

With that, we present OEM Sandpaper by FGCI. FGCI OEM Sandpaper is perfect for almost any job. It uses a Pressure Sensitive Adhesive (PSA) backing and is offered in 5” and 6” sizes. They are sold in rolls of 100 and run anywhere from $14.75 a roll to $27.80 a roll. At that price, it’s convenient and easy to buy the many grits we offer for any job you have.

The best part about OEM sandpaper is the longevity. You know you have been there when you replace a sheet and start sanding only to see the brand new paper completely useless moments later. With OEM sandpaper, you will get a fantastic life from your paper at a minimal cost.

OEM Sandpaper is available in our stores in St. Petersburg and Ft. Lauderdale; online at www.FGCI.com and now on Amazon, too!