Imported from Germany, 574 Loctite is an excellent anaerobic flange sealant for your Porsche engine. We have tried all the available sealants for case halves, and this one works the best, bar none. It seals beautifully, and where it really shines is in cleanup or re-sealing. Unlike the brown goop most people use, this product is very easy to remove from the engine case if you are rebuilding. 50ml squeeze bottle will do at least 4 engines.