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:
https://bilthamber.com/product/dynax-seam/
The journey is the destination 
Seam sealer will look incredibly messy to be honest when you brush it on. I personally wouldn't recommend doing it that way.
Dynax UC with some long nozzles would be your best bet. Then S50 cavity wax down down the sides where the side skin go toward to the cockpit.
Olly Amos - 2008 Caterham Superlight Sigma 150
Happy to be proven wrong but I suspect that will do more harm than good. You really need something that will creep into crevices like ACF50 or Waxoyl. I just spray ACF everywhere once a year, if you're a polisher you might find the mess too much to bare though.
I can cope with mess if it helps prevent, or limit, corrosion. Point taken about the seam sealant. I have a new can of Dynax UC but it came with a hopeless straw that won't help me reach into the engine bay, from top or bottom. I've just ordered a longer tube from eBay, which will hopefully help.
The underside of the car has had a liberal dose of ACF-50. Brilliant stuff.
The journey is the destination
I'd just put some sort of cavity wax in there (my preference is Bilt Hamber) sealing it up could trap moisture on the wrong side of the sealant!
I recall someone posting about making some closing panels out of some thin ally.
In terms of ACF50, are the aerosol sprays ok, or is it best to buy the liquid and then apply with combination of a mist spray and cloth where needed? I would guess the liquid allows it to soak in to the small gaps easier than the aerosol?
“…the road must eventually lead to the whole world. Ain’t nowhere else it can go - right?”
Caterham 420S on Instagram
I tend to buy the larger bottles and then decant it into my own pump sprayer with a lance. You can really get it into all the nooks and crannies then. It does a good job of seeping into everything. You can wipe down afterwards to tidy things up if you want.
The journey is the destination
Interestingly ive never had a lot of luck with using fine mist pump sprayers with ACF50, .... they all fail to mist as it seems to be just a bit too viscous. Happy to take advice on where im going wrong!
R500sv
'Bravery is being the only one who knows you are scared'
You seem to need to warm ACF50 quite a lot to spray it, whether aerosol or pump bottle.
I used Dinitrol 3125 cavity wax, warmed in hot water and then pressure-sprayed via a wand.
JV
I bought these from RIF many years ago and sealed all around the edges but removed them as I felt that whilst they were keeping debris out, they were trapping moisture in and prevented (hot) air flow through the trap to dry them. But I could be wrong.
Cowering in a dark corner waiting for some clever dick to come along to correct or criticise my spelling and grammar