Fuel tank top coat PR1005L and CS3600

[Montreal]

Contemplating using a brushable topcoat sealant CS3600 (equivalent PR1005L), applied on top of CS3204 or PR1422. Has anyone tried this during their build process? Mooney aircraft recommend the additional topcoat in their manual and I have seen it brushed in Cessna tanks. It comes with a limitation in that you cannot use any fuel with alcohol/ethanol additive e.g. Mogas with ethanol. Can be used as a "slosh and seal" but not how I intend to use it. I have sent message to Sling technical and will update once I hear back from them.

Flamemaster 3600 technical data
https://flamemaster.com/wp-content/uplo ... glish.pdf

[lutorm]

What would be the advantage of using this, are you afraid of corrosion?

[Montreal]

The advantage would be to improve seal and time in service before leaking occurs. The thought of fixing leaks is my cause for concern because these tanks are not accessible for repair without removing.

[Montreal]

Sling technical feedback: "We do not use the CS3600 and unfortunately do not have any experience with it."

I'll stick to the plans on this and not reinvent the process. It doesn't sound like the Sling community and manufacturer do not need/use product.