how do you even BEGIN to clean that up

they put down tarps so it’s all okay

Luckily, the foam decomposes pretty quickly, so you’re just left with soap everywhere… but David did have to repaint his house cuz it stained the walls green.

The main danger is the heat from the reaction (you can see it steaming cuz the reaction produces water, O2 gas and lots of heat) and possibly a skin reaction to the catalyst they used (potassium iodide)