IMCO Slate Products

IMCO is a primary supplier of processed slate products to the asphalt sealcoat industry throughout the Western US. IMCO slate is mined and processed to provide the end user with a product that delivers consistent and reliable results. It is available in two mesh sizes, 20 mesh and 60 mesh, and can be delivered in bulk or super sacks.

For orders and shipping information please contact IMCO Customer Service at (916)383-2811.

IMCO is a member of the Aspalt Sealcoat Manufacturers Association (sealcoatmfg.org)

IMCO #20 Slate

 

  • Available in bulk and super sacks.
  • Milled on a Raymond Roller Mill for consistent particle size.
  • Flash dried for low moisture year-round.
  • Ore reserves in excess of a million tons.
  • Shipment via flatbed or pneumatic from Sacramento, CA.
  • Can be combined with other IMCO products for truckload savings.

Physical Characteristics

  • Blue black color
  • Opaque to ultra violet light
  • Specific gravity = 2.7
  • Mohs hardness = 6.5
  • Compression greater than 11,000 psi
  • Loss on ignition at 10000 C = 5%
  • Shipping moisture content ~ 1%

Chemical Analysis

SiO2

66.4%

Al2O3

17.1%

Fe2O

7.4%

CaO

0.9%

MgO

2.9%

Na2O

1.0%

K2O

3.8%

 

Typical Sieve Analysis

20 mesh

99% passing

50 mesh

74% passing

100 mesh

55% passing

200 mesh

38% passing

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IMCO #60 Slate

 

  • IMCO #60 is a fine particle sized slate.
  • Ideally suited for spray applications.
  • Better suspension qualities.
  • Available in bulk and super sacks.
  • Milled on a Raymond Roller Mill for consistent particle size.
  • Flash dried for low moisture year-round.
  • Ore reserves in excess of a million tons.
  • Shipment via flatbed or pneumatic from Sacramento, CA.
  • Can be combined with other IMCO products for truckload savings.

Physical Characteristics

  • Blue black color
  • Opaque to ultra violet light
  • Specific gravity = 2.7
  • Mohs hardness = 6.5
  • Compression greater than 11,000 psi
  • Loss on ignition at 10000 C = 5%
  • Shipping moisture content ~ 1%

Chemical Analysis

SiO2

66.4%

Al2O3

17.1%

Fe2O

7.4%

CaO

0.9%

MgO

2.9%

Na2O

1.0%

K2O

3.8%

 

Typical Sieve Analysis

60 mesh

99% passing

100 mesh

83% passing

200 mesh

57% passing

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