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Aluminum Oxide (Black Sintered), 16 through 150 Grits

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SKU SINTER.YouPickGrade.49lbs
Weight + Tare 50.00 lbs
Our price: $68.00
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4+ Items $65.00
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Sintered aluminum oxide is excellent abrasive choice for powdercoating and anti-skid flooring applications.   This product is a hard and unyielding abrasive, semi-friable, with a price point lower than fused aluminum oxides.  Exceptionally well-suited for use with air-compressed jet-blasting equipment, both pressure and suction.   Use this page to order a 50lb box of Sinterblast, grit sizes 16 through 150.  Standard packaging is 40, 50 lb bags/pallet.  Repackaging/Processing lead times are 1-3 business days.

What Is Sinterblast?

Sinterblast is a new sandblasting abrasive made from the same raw feed stock as fused aluminum oxides (Bauxite).  Sinterblast is created via a sintering process, not the normal fusing process.  This sintering process uses less electricity than fusing does, allowing this media to be priced significantly lower than brown fused aluminum oxides.

Sinterblast is a high temperature calcined bauxite abrasive grain; 78 pecent aluminum oxide, 13 percent iron oxide. It is often used as to replace brown fused aluminum oxide due to its lower cost.  Sinterblast is a very hard, tough abrasive, allowing it to be recycled many times, just like regular brown fused aluminum oxides. 

Sinterblast is just as hard as fused aluminum oxide, but it has a lower bulk density and is more friable.  The big difference is its medium friability.  Consider it in the middle between brown fused (low friability) aluminum oxide and white fused (highly friable) aluminum oxides.

SPECIAL NOTE ON 49 LB BOXES!!!  Due to UPS charging huge fees for boxes weighing over 50 lbs, we are forced to short each box a pound or two.  This is why we are now calling our 50lb boxes "49 lb boxes".  This is the best solution we could come up with in order to get you the cheapest shipping rate possible.

PSI Information:

Sinterblast should be blasted at a 60 psi in general, due to its medium Friability.  This is a much lower psi than regular brown fused aluminum oxides (80-90), so please make a note of this.  You will not obtain ideal results if you do not start with a lower psi.  Sinterblast is slightly more friable than brown fused media, and this is why you need to use a lower psi.  Since you can reclaim this media multiple times, the cost savings of switching to Sinterblast can be impressive.  Some of our clients have switched 100% to Sinterblast (from brown fused aluminum oxide). 

What Is Friability?  Short Answer:  How easily/quickly a media shatters on impact and breaks down.  This is different from Hardness Rating.  Sandblasting medias can have the same hardness rating, but completely different Friability Ratings.  Think of Friability as durability.  

  • Brown Fused Aluminum Oxides have a LOW friability, so it will break down slowly, and coarser sizes can be recycled and reclaimed.  Coarser sizes can be reclaimed a few times.
  • White Fused Aluminum Oxides have a HIGH friabilty, but the SAME HARDNESS rating (in general) of Brown Fused Aluminum Oxides.  It will thus shatter on impact and break down quickly, without doing as much damage/impact to the substrate.
  • Sinterblast, or Sintered Aluminum Oxide has a MEDIUM friability.  Think of it as the middle ground between Brown Fused and White Fused.  It can be recycled in coarse sizes, but will not have the long life (durability) of a Brown Fused AO.  It is often preferred by powdercoating companies due to its lower cost.  If you are just taking off mil scale prior to coating, this is a great media to try out.  It is a lower purity aluminum oxide, and cheaper in cost to manufacture due to the sintering process being less expensive than the fusing process.  THE MEDIUM FRIABILITY OF THIS TYPE OF ALUMINUM OXIDE IS WHY YOU BLAST AT A 60 PSI, AND NOT THE USUAL 80-90 PSI OF BROWN FUSED ALUMINUM OXIDE.  ANYTHING HIGHER AND YOU WILL NOT ACHIEVE GOOD RESULTS BECAUSE THE MEDIA WILL SHATTER UPON ITSELF IN THE AIR STREAM BEFORE GETTING TO YOUR SUBSTRATE.

Sizing - These Are Approximations Only.  Approximations are based on using a pressure blaster on hot rolled steel, having tightly adhering mill scale, using a 90-100 psi.  Anchor patterns will vary tremendously based on other variables such as hardness & type of steel, level of corrosion being removed, blast angle, blast distance from the steel, etc.

  • 1 mil profile = 100 grit aluminum oxide
  • 1.5 mil profile = 50 grit aluminum oxide
  • 2 mil profile = 36 grit aluminum oxide
  • 2.5 mil profile = 24 grit aluminum oxide
  • 3 mil profile = 16 grit aluminum oxide
  • 4 mil profile = 12 or 16 grit aluminum oxide


We will gladly send you a working sample so you can try this new blasting media out before purchasing.  We will need your ups account number to pay for the shipping costs.


  • Typical Packaging:  Bags, Pails, Drums, or Supersacks
  • Color:  Black
  • Safety:  Avoid breathing dust; wear protective gear
  • Pricing:   Based Per:Pound
  • Shipping Point:  East Coast
  • NMF Classification:  Class 55
  • Odor:  Odorless
  • Fire & Explosion:  Fines can cause explosion and smolder
  • Keep away from all sources of ignition
  • Purity:  78% Al2O3; 13% Fe2O3
  • Hardness:  Mohs 9
  • Friability:  Semi-Friable
  • Crush Resistance @ 7500 psi:  34.7 (% fines)
  • Hazardous?  Not listed as hazardous; see other cautions
  • Disposal:  According to Federal, State, Local regulations
  • Type:  Granular or powdery depending on grade
  • Specific Gravity:  3.58 - 3.68 g/cm3
  • Boiling Point:  4500?F
  • Bulk Density:  1.80 G/CM3
  • Chemical Stability:  Stable

Shipping & Packaging Information:

  • Pallet Packaging:  This media is generally sold by the net ton, or per 2,000 lbs.  Packaged in 50lb bags, 40 bags per pallet.  One net ton per pallet. 
  • Supersack Packaging:  We can also package this in 2,200 lb super sacks. (1 metric ton) 
  • 400lb Drum Packaging:  For a couple pennies per lb more, we can package media into 400lb drums for you.  4 drums per pallet or 1,600lbs/pallet.  Please request this when you ask for a quote.  Yes, we can ship a single drum if that is all you need.
  • Discount Pricing:  Please use our Quote Request form to obtain custom pricing on larger quantities, with freight.  Remember to tell us your ship-to address and the total number of lbs or tons you want a bid on. 
  • Loading Dock:  Generally, you need to have a commercial address with loading dock to receive orders over 200lbs.  If you do not, we can ship it to a local terminal and you pick it up yourself from the terminal.  We can also ship to a residential address, but this is very costly and not recommended.

Typical Applications:

  • Powdercoating
  • Carving 
  • Concrete Additive - ANTI-SKID, ANTI-SLIP 
  • Etching & Gouging
  • Finishing
  • Grinding
  • Non Skid Anti-Slip Additive to broadcast onto your flooring surface (Coarse sizes, like a 24)
  • Sandblasting
  • Slurry Mixes
  • Surface Preparation
  • Mil scale removal, surface prep
  • Tumbling - this is not the best media for rock tumbling, please see our black silicon carbide pages for rock tumbling media.

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1 Most useful customer reviews (see all reviews):
Jan 1, 2003
Cheap and works well!
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