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Prepare Surface:
Remove all loose and weakened fiber and bricks,
debris, particles, dust and grease from interior walls, door, crown, floor and grooves
behind electrical elements. Immediately before applying ITC-100, dampen these areas by
spraying lightly with water.
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Spray Application:
Spraying is recommended by ITC for large areas like walk in kilns and industrial furnaces.
Smaller kilns are often sprayed when the equipment is available or multiple kilns are being relined.
ITC products are sprayed with a heavy solids gun like used to apply glazes by potters or sand blasting guns.
The better of these have a carbide or saphire nozzle to reduce wear.
Plastic spray bottles will clog instantly and it would wreck an air brush.
Spray guns are available from ITC as well as other sources.
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Brush Application:
For blacksmith forges, small kilns and other applications requiring a pint of ITC-100 or less bushing is a suitable method of application.
There are two brushing methods.
For very small areas, touching up chips coating small crucibles or crucible blocks I use a stiff artist's paint brush and make a slurry of ITC in the jar.
This requires patience and continous working of the surface with a wet brush until a heavy slurry is formed.
The advantage of this method is that no material is wasted in mixing in a second container.
The second method is to thin as instructed and apply with a suitable brush.
I use a ragged old 1" (24mm) fibre brush plus a 3/8" (10mm) artist's brush in tight places or where I need control.
When applying to refractory blanket such as Kaowool or Inswool it is best to apply to new blanket.
The surface of used blanket breaks down and is difficult to coat.
Apply two coats.
Dampen the surface then apply a thin coating. Coverage may appear spotty, this is normal.
After the first coat dries fire the surface to cure.
Then apply a second heavier coat.
This will be much easier to apply over the sealed surface.
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Thinning / Mixing:
"To one pint of ITC-100 add one-half pint of water and mix well."
The ITC products are all shipped as a heavy paste (about like medium hard ice cream).
In fact an ice cream scoop is a very good tool for scooping it out of the jar.
When ITC-100 is thined it is a thick slurry like plaster or clay slip.
It contains a lot of heavy fine sand like solids that must be kept in solution.
I find when mixing that it is best to let set overnight and then mix again.
This gives the lumps time to break up and the fine solids to become suspended in the mix.
If the diluted mix sets for any time it will settle and must be stirred again.
When applying by spraying the can must be agitated constantly to keep the solids floating (like using metalic paint).
Partialy used containers of ITC-100 should have a small amount of water added and then be resealed.
Pint containers can be put into zip-lock plastic bags to prevent moisture loss.
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Coverage: 50 to 100 sq. ft. per gallon (6 to 12 sq.ft per pint).
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[ Forge Refurb ] :
Rebuilding a small forge with ITC products.
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[ ITC-100 MSDS ] :
Click for Material Safety Data Sheet. |
