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Old 12-22-2018, 05:11 PM   #4254 (permalink)
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Originally Posted by freebeard View Post
Do you know how he did it? Detergent in the mix or forced air bubbles?

My father took a 5-panel door into a room once and stripped the paint in 1/2 hour. He never told me how he did that.
yes,it was cellular concrete.He used DuPont 'Duponal' surfactant,with a very strong surface tension bond.
The surfactant was diluted in water,then forced through a foam-gun (Valved PVC tube full of stainless steel mesh),under about 150-psi air pressure,and injected into the back of a Ready Mix truckload of 8-sack,sand mix,and mixed in.The bubbles are so strong they survive the torture of the mixing and ram-forced passage through a concrete pump and hose.It's trippy stuff! Hollywood special effects!
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