AirCrete is inexpensive, easy to make, and easy to work with.  It requires only basic skills. 

It's easy to make.  And, like baking a cake, you have to get the recipe right. The quality and density of the foam is important. Use an accurate postal or kitchen scale to check the weight of your foam. It should be between 90 - 100 grams/liter (about 3 ounces/quart). 

You can use good quality dish detergent to make the foam with Little Dragon, our continuous foam generator. Look for a high foaming degreaser detergent. We tested Seventh Generation Natural Dish Liquid, Dawn Ultra and Safeway Home concentrate.  They all produced adequate foam diluted 40/1 with water. (5 gals water / 2 cups foaming agent).  Add the detergent to the water and mix thoroughly.

You need an air-compressor rated for at least 2.5cfm@90psi, which is a relatively small compressor. Of course you can use a bigger compressor if you have one.

Mix one 94lb bag of cement with 6 gallons (US) water. Put all the water in your container first and add the cement while you are mixing to avoid clumping. When the cement and water are well mixed, turn on the Little Dragon and add foam to the mixture. Add enough foam to make a total of 45 gallons of AirCrete. That's about 30" high in a standard 55 gallon drum. The foam is very light weight and so it wants to float on top of the cement mixture. Our foam injection mixer works great because it injects the foam directly into the mixing paddles at the bottom of the barrel where it is mixed into the cement before it can float to the top.