Anyone know where to purchase food safe high temp silicone? I want to seal my smoker doors.
I was looking at the high temp gasket stuff for cars but it says that it emits formaldehyde fumes at 300*. That cant be good.
Reading the MSDS it doesn't look like the Rutland's 500 is food safe.
"Hazardous Decomposition Products
HIGH DECOMPOSITION AND FIRE MAY RELEASE CARBON OXIDES, TRACES OF INCOMPLETELY
BURNED CARBON COMPOUNDS, SILICON DIXIDE, AND/OR FORMALDEHYDE."
500 F heat resistant silicone sealant forms a tough rubbery adhesive seal and maintains its flexibility at 450 F continuously and 500 F intermittently. Uses include: sealing fireplace inserts, solar panel repairs, flashings, applying ceramic tiles - anywhere a black permanent elastic seal is needed both indoors or outdoors. Adheres to most materials. Acetoxy cure. Meets ASTM C920-86.
Interesting, even the food grade FDA approved ones emit formaldehyde under thermal breakdown. Of course, if you have thermal breakdown on your silicone door seal you probably have bigger issues to contend with, like getting a fire extinguisher to put out the fire.