Kastolite 50-25 Plus – 5lbs


This is our recommended castable refractory for building a forge without wool.

Availability: 7 in stock

SKU: 665275987441-1 Category: Tag:

We have tested over 40 refractories found this to be the best compromise between insulation and castability.
Kastolite 50-25 Plus is a 2500°F rated, lightweight insulating refractory.
Insulating refractory does not absorb heat like heavier refractory.

  • Includes 5 lbs of material, more than enough to cast a new chamber for an Atlas forge.
  • Requires 24 hours to chemically cure
  • We recommended baking in the oven for 5 hours @ 400°F to remove moisture.
  • May also be air dried for 2 days with a fan blowing on it.


Weight 6 lbs
Dimensions 9 × 6 × 3 in


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