I am wondering what the regs are around application of intumescent substances in critical areas in the cowling? Something like this.
This type of paint finish is standard on Grob aircraft and I think Extra. Intumescent paints are difficult to apply and peeling is not unusual.
To counter the difficulties Grob have changed the type of intumescent paint they use, I have yet to see if it is any better than the last type of paint.
The type of substance referred to in post #1 is commonly used to seal the edges of self adhesive heat protection foil that is sometimes found inside cowlings in heat critical areas.
I can’t help feeling I would share Peter’s opinion in post #2 as to the use of this substance.