Reddit reviews Permatex 80697 Copper Spray-A-Gasket Hi-Temp Adhesive Sealant, 9 oz. net Aerosol Can
We found 2 Reddit comments about Permatex 80697 Copper Spray-A-Gasket Hi-Temp Adhesive Sealant, 9 oz. net Aerosol Can. Here are the top ones, ranked by their Reddit score.
Fast-drying, metallic copper spray adhesive/sealant helps to dissipate heat, prevents gasket burnout, and improves heat transferFills minor surface irregularities, fills hot spots and surface imperfectionsResists all types of automotive fluids, especially gasolineTemperature Range: -50°F to 500°F (-45°C to 260°C)Suggested Applications: Cylinder head gaskets, exhaust manifold gaskets, and other high temperature applications
You can get it on Amazon or most autoparts stores https://www.amazon.com/Permatex-80697-Gasket-Hi-Temp-Adhesive/dp/B000HBNUDQ It was used a lot in the past for sealing one piece metal head gaskets and not as common now with the multilayer gaskets. It helps fill in any imperfections that might not seal so never a bad idea when reusing a gasket.
The stock system has gaskets at the stock exhaust manifolds-to-downpipe but uses metal donuts between the pipes otherwise. Called gaskets, but are really compression donuts. They can be reused unless you see visible damage that may allow the gases to escape on the outside. i.e. cuts, severe pitting, etc. They're only $2 a piece or so if you want to change them.
Alternatively, you could buy a can of Permatex copper high temp gasket sealer and spray them down to seal up those imperfections for added reassurance.
https://www.amazon.com/Permatex-80697-Gasket-Hi-Temp-Adhesive/dp/B000HBNUDQ