Can you use cement in a forge?

Asked By: Tong Hacke | Last Updated: 27th June, 2020
Category: home and garden indoor environmental quality
4.4/5 (407 Views . 18 Votes)
Portland cement actually will burn at temperatures forges exceed, so burnout isn't just a possibility, it will happen, and with a forge, it won't happen at a convenient time.

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Also asked, can you use concrete for a forge?

Concrete is a big NO! Concrete will contain trapped water and will explode when it gets hot enough. But, you said you have refractory on hand - if you have refractory cement then just use that.

Furthermore, how thick should refractory cement be? between 40 mm and 200 mm

Besides, how do you make refractory cement for a forge?

Refractory Cement Recipe #3

  1. Mix Perlite and Fire cement using the above measurements.
  2. Allow it to try for several days at room temperature. (68°F -72°F)
  3. Bake at 250°F for several hours until no steam or smoke is coming out of it. Allow it to cool completely.
  4. Repeat at a slightly higher temperature.

How do you make fire cement?

  1. Place your sheet of plywood in the work area or the wheelbarrow.
  2. Portion the materials into a 3:2:2:0.5 ratio so you have 3 parts gravel, 2 parts sand, 2 parts refractory cement and 0.5 parts of the hydrated lime.
  3. Place the gravel and sand into the wheelbarrow or onto the plywood.

30 Related Question Answers Found

What is refractory cement made of?

By volume, it is 3:3:4 Portland cement:perlite:silica sand, mixed together thoroughly, then combined with 4 parts fireclay. The dry ingredients are then moistened to the texture of “stiff cookie dough,” packed into a form, and allowed to dry thoroughly before bake-out.

What is castable cement?

Castable Refractory Cement is a dry-mix material, which when mixed with water, chemically sets as hard as a brick. Properly cast and dried, it withstands 2200°F temperatures. Use it to cast a solid stove bed, repair firebrick, or cast it into custom shapes tailored to the exact needs of the fireplace or stove.

What is Satanite?

The Satanite is a refractory cement that insulates the surface of the wool, this keeping more of the heat in the chamber ( it does not reflect or absorb, just insulate). The ITC-100 is a highly heat reflective coating that greatly reduces the heat loss. My process is to use a 2" kaowool blanket.

Can I make my own fire bricks?


Lay a piece of plastic sheeting on a smooth surface or you can mix the refractory cement on a smooth, concrete surface. Pour out one and a half parts masonry cement, one and a half parts perlite, two parts fire-clay and two parts sand. Stir the dry mixture using a shovel until it is thoroughly mixed.

How long does refractory cement take to dry?

Drying of Densecretes and Litecretes
After curing the lining should be air dried for up to 24 hours. If the lining is greater than 250mm, curing should be 24 hours. If Q.T. fibre is present in the refractory concrete, this step may be reduced to 8 to 12 hours for linings greater that 100 mm.

How do you use refractory cement?

  1. Dump the dry refractory cement into a mixing container such as a wheelbarrow or a bucket.
  2. Add water to the mixture and mix with a garden hoe until it has reached the consistency of peanut butter.
  3. Apply the refractory cement to the surface on which it is being installed using a trowel.

How big should my forge be?

A: A 1/4" thick coating is generally good. You can coat the bottom of your forge thicker if you like. If you do so would recommend no more than 1/4"-1/2" if your using split brick or kiln shelf floor on top of the castable.

Is Kaowool dangerous?

Silicosis is the fear with prolonged exposures and airborn particles (from fired ceramic fiber) are the dangers. Tearout of fired kaowool produces the airborn 'dust'. Besides silica, also contains fired kaolin clay, and other minerals.

How much is a propane forge?


Usually ships within 6 to 10 days. This is a great forge for the beginner blacksmith. It's small, portable, gets to heat fast, and also is very economical on propane. I have built to forges with fire brick and this forge works much better.

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How long does Kaowool last?

Normal shelf life of the Kaowool thermal ceramics rigidizer is twelve months in unopened containers that have been properly stored.

How do you use a Kaowool Rigidizer?

Kaowool Rigidizer is applied by brushing, dipping, rolling, and spraying. Suitable respiratory protection and ventilation are required when applied by spraying. Materials to be rigidized should be free of all grease and oil. Kaowool Rigidizer receives its bonding action from the removal of physical water.