Kastolite 30 Mixing And Dry Out Instructions


The following is given in good faith for Guidance only.

**Before attempting to mix refractory, be sure to wear proper personal protective equipment such as eye protection, appropriate dust mask, and disposable gloves. Mix outdoors or in a well ventilated area. When mixing add water to the refractory, and stir slowly as not to generate dust plume. 

Below is the manufacturers instructions for mixing and dryout


Material should be stored in a dry place. For best results, material should be maintained at 50-70F prior to casting. Under these conditions, the maximum recommended storage life for this product is twelve months.

Porous back-up materials or wood forms should be waterproofed. Absorption of water can result in reduced flow for the product.

Forms must be stout and water tight.

This product is designed to be mixed with water and then poured/handcast into place.

All equipment used to mix this product must be clean. 

Add only clean water suitable for drinking with a pH value between 6.0 and 7.5.

For best results, water should be maintained at 50-70F.

--------- MIXING REQUIREMENTS ---------

Approximate Water For Installation

3 ounces of water per lb of dry material

Mix for at least three minutes.

For best results, wet mix temperature should be maintained at 60-75F. Minor adjustments to the amount of water are permissible to achieve desired flow.

--------- INSTALLATION ---------

Place material promptly. Do not trowel to slick finish. At temperatures above 60F, air cure, keeping surfaces damp and/or covered, for 16-24 hours typically or until a hard set has developed.

**Rotating the forge so that you are working with gravity rather than against it, will help make application of the castable refractory easier, especially when using more than one type of refractory within the forge. Casting the top and sides first, letting the material air cure to a hard set, then rotating the forge so that you can cast the bottom is a good way to accomplish this. 

Lower ambient temperatures will increase the time before a hard set develops.

The best results are achieved at curing temperatures of 90-110F. Keep material from freezing during air cure and preferably until a dryout can be initiated. Freezing of this product prior to water removal can cause structural damage.

-------- HEAT UP SCHEDULE --------

Heating and cooling refractory structures can be a complex procedure every effort must be made to adhere to the dryout schedule listed below.  Please note Pro tips have been added to help simplify the dryout of the refractory coating. The following is given in good faith as guidance only. 

Working with high temps is dangerous. Be sure to follow common sense safety procedures before beginning work. Always wear the proper personal protective equipment appropriate for the task. Keep a functioning fire extinguisher near by at all times. 

Never enclose a castable in a vapor-tight encasement as a dangerous steam explosion may result.

Typical dryout schedule for a single layer, 9" (229 mm) thick or less:

ambient to use temperature 100F (56C) per hour