Marinite instead of Micore 300

MountainStoveGuy Posted By MountainStoveGuy, Aug 25, 2006 at 3:26 PM

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  1. MountainStoveGuy

    Minister of Fire

    Jan 23, 2006
    Boulder County
    I was talking to one of our subcontractor installers the other day about a source on Micore 300. He said that he no longer uses it because of the density and fragility. He has been using this product for years, apparently its structural, and has a 1.2 r value per 1/2". Mabey someone can confirm that with the specs listed below. Have any of you used this product?

    MariniteTM I panels can be used in construction and refurbishment of ovens, dryers and other insulated housings for the retention of control or heat. It, also, can be used in areas of fire protection, fire training, and as lightweight insulation panels

    MariniteTM I combines structural strength with high thermal insulating values. It is incombustible, highly damage resistant, non-corroding, and extremely water resistant. Mariniteâ I panels also provide fire safety, uniform temperature control, and require minimal maintenance.

    An oven dried, structural insulation board formed from calcium silicate with inert fibers and reinforcing agents

    48 x 96 in the following thicknesses in inches- ½, ¾, 7/8, 1, 1 ¼, 1 ½, and 2; cut and fabricated to shape.


    46 lbs/ft3 - 737 kg/m3

    Maximum operating temperature
    1200° F

    Shrinkage, during initial heating condition

    length & width


    Compressive strength - for 10% deformation
    1350 psi

    Flexural strength
    800 psi (56 kg/cm2)

    Pandux, Durometer Hardness

    Normal moisture content

    Thermal Conductivity
    .81 BTU-in/ft2,hr,° F@400° F (0.12W/mK@205° C)

    .86 BTU-in/ft2,hr,° F@1000° F (0.12W/mK@538° C)

    Fire hazard(ASTM 84) flame spread

    smoke developed

    Volume resistivity (ASTM D-257)

    600° F - dry
    8.15 x 1011 ohm-cm

    75° F - 50% relative humidity
    9.83 x 107 ohm-cm

    71° F - 91% relative humidity
    3.49 x 106 ohm-cm

    Dielectric strength (ASTM D-495)
    45 volts/mil

    Screw holding strength @7/8in penetration
    220 lbs (100kg)
  2. MountainStoveGuy

    Minister of Fire

    Jan 23, 2006
    Boulder County
    I called the local dealerthat the installer buys this from. He is a retailer in denver, for anyone in this area, here is the info
    Renler Co
    2800 S Shoshone st
    Englewood CO

    Br prepared to drop $271.90 for a 4X8 sheet!
  3. tradergordo

    Minister of Fire

    May 31, 2006
    Phoenixville, PA
    I think you found the problem! :)
    Micore 300 is $30 for a 4x8 sheet.
    I've heard complaints before about the fragility of micore 300 but I don't really get it. Who cares if its almost as fragile as cardboard? It doesn't seem to compress much, I used it in my hearth pad and it worked out just fine, many others have as well.
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