I've been researching various ways to seal the areas around the engine bay grot traps. As a keen detailer I've always loved products by Bilt Hamber and I've just come across a product called Dynax-Seam, a flexible, brushable sealant.
I was initially looking at sprayable sealants but realised it would be hard, not to mention messy to get into all the right areas. I might invest in a pot and report back. I reckon it would be easier getting a long brush into the harder to reach areas.
Has anyone tried it? A link to the product: