How To Make Custom Foam Hollow Rocks for Outdoor Speakers

Open an Ez-Spray® foam cartridge by prying off the tip of the cartridge. Install a flow regulator (included) before adding the static mixing tube. Install a static mixer (included) on the cartidges. Then, tighten the collar over mixer tube and load the cartridge with the mixer into the EZ-Spray® gun and attach the air line hose.

Note: gloves are recommended when working with any materials.