Per the manufacturer, Phos-Chek Long Term Fire Retardant has an indefinite shelf life as long as it is stored in an area where it will not be exposed to moisture or where water may leak into it.
Phos-Chek Long Term Fire Retardant does not come with a spray bottle. The product label states that a standard home garden sprayer can be used for application.
The Phos-Chek Long Term Fire Retardant product label states that it will last "for the entire fire season so long as the weather remains dry. Rainfall of 1/4 in. or more will wash Phos-Chek off treated vegetation." If grass is cut or if you receive more than 1/4 in. of rainfall, you would need to reapply.
We apologize, but at this time we do not carry any fire retardant products that can be applied indoors. The Phos-Chek Long Term Fire Retardant is just for exterior use.
Per the manufacturer, Phos-Chek Wildfire Home Defense is effective on any vegetation. You can absolutely apply it to the arborvitae and it will remain effective until washed off by rain or hose.
The retardant wont do anything for a metal propane tank however. They would recommend you keep all vegetation clear from around the propane tank and apply retardant to any vegetation in close proximity to the tank.
When applying Phos-Chek Wildfire Home Defense, you will want to shake well before mixing and only mix with water when you plan to use it. If you need to mix for a larger area, using a 5-gallon sprayer, mix the entire 0.75 gallons of concentrate with 4.25 gallons of water. If using a smaller sprayer for application, mix 1 part concentrate with 5.5 parts water.
**For best results, use a paint strainer, or cheesecloth when pouring concentrate into water to allow for any particles that may clog nozzle during application.
Yes Phos-Chek Wildfire Home Defense is designed to be applied as a preventative pre-treatment by spraying dry grasses, brush, wood, or other cellulose material around your home at the beginning of fire season.