Fabsil on a car cover - madness or sense?
Fabsil on a car cover - madness or sense?
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Discussion

PabloGee

Original Poster:

887 posts

50 months

Tuesday 6th June 2023
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I've got a circa 10 year old Stormforce 4 layer All Weather cover, it wasn't used for a number of years as the car was garaged, but alas it no longer is, and spends at least half the week with its coat on.

Mostly it's fine, but I have noticed in wet and very cold that condensation forms on the car exterior, and that's the weather that I prefer not to take it out in (holding on to my boyish excitement and the back wheels can be a chore!).

I use Fabsil on the roof, and it needs re-applying every year or so depending on how much rain it has seen.

So, does adding waterproofing to the cover make sense, or total bobbins because it will stop it from breathing?


Griffith4ever

6,965 posts

65 months

Tuesday 6th June 2023
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This is what happens to an MX5 if left with a non breathable cover on over winter..... (it never really cleared up, even after cleaning - it would come back at the 1st hint of damp weather)


anonymous-user

84 months

Tuesday 6th June 2023
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That also happened to my Audi A4 convertible when under a breathable cover, but parked under trees at my brothers house for the winter.

Personally I wouldn't have an older convertible unless I had a garage to park it in for this reason.

ARHarh

4,892 posts

137 months

Tuesday 6th June 2023
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Griffith4ever said:
This is what happens to an MX5 if left with a non breathable cover on over winter..... (it never really cleared up, even after cleaning - it would come back at the 1st hint of damp weather)



That was not caused by a cover alone that would have happened to any car left with no ventilation. Unfortunately it is difficult to leave a car outside with the window open without causing even worse damage. That sort of mould will even happen if left in a garage for any length of time without an open window.

Griffith4ever

6,965 posts

65 months

Tuesday 6th June 2023
quotequote all
ARHarh said:
Griffith4ever said:
This is what happens to an MX5 if left with a non breathable cover on over winter..... (it never really cleared up, even after cleaning - it would come back at the 1st hint of damp weather)



That was not caused by a cover alone that would have happened to any car left with no ventilation. Unfortunately it is difficult to leave a car outside with the window open without causing even worse damage. That sort of mould will even happen if left in a garage for any length of time without an open window.
It didnt happen to my TVR, garaged every year over winter, roof on (4 years) , car "sealed" (to keep mice out). It's not happened to my R8 either ( 3 years) - same.

Happened to my MX5 under a cover though. Wish I had not covered it! - I assumed in a car the air vents even unpowered, would be "some" ventilation, let alone an MX5 pram-roof.

shtu

4,573 posts

176 months

Tuesday 6th June 2023
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Nikwax TX Direct, available as both wash-in and spray-on treatments specifically intended for cleaning and reproofing breathable fabrics.

Advertised for clothing, but breathable fabrics are much of a muchness.

rev-erend

21,623 posts

314 months

Tuesday 6th June 2023
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In very cool and damp months this used to happen to my garages TVR.

The solution was a unibond aero 360 which removed any humidity inside the car.

swisstoni

24,069 posts

309 months

Tuesday 6th June 2023
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I’ve had Chimaeras for longer than I care to remember and have tried it all, including the setup you currently have.

In your position I would ditch the full cover and fit what is sometimes called a car cap which just covers the greenhouse of the car.
These can be cheepo, totally waterproof things, which you can whip off and on quickly and store easily.
It will keep water from seeping through the roof while allowing some air to get around.
The ‘breathable’ types allow water to pass through them rather too much for my liking.

The rest of the car can live in the open quite happily and won’t have its paint marred by the movements of a full cover.

McGee_22

8,133 posts

209 months

Tuesday 6th June 2023
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rev-erend said:
In very cool and damp months this used to happen to my garages TVR.

The solution was a unibond aero 360 which removed any humidity inside the car.
This - a very easy way to keep car interiors free from damp and mould.

PabloGee

Original Poster:

887 posts

50 months

Tuesday 6th June 2023
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Some very informed responses there! Thank you.

I am tempted with the mix of the car cap thing and the Unibond dehumidifier suggestion when the colder months arrive.

The reason I started using the cover more religiously is because I found some microbubbling on the paint that only arrived after I left it uncovered during the relentless rain then eventual snow of our last winter. I just couldn't get the car dry to put the cover on because it didn't stop bl00dy raining! I feel convinced it was the snow that did it.
We also have a couple of large council owned trees that drop all sorts of cr@p on my driveway, which means a clean car lasts for a day (my daily suffers).
I've got a bundle of blossom and st stuck in the grill and behind the bonnet catch, which is driving me nuts.

Overall the car is ready for a respray, but I'm not in a position to do that yet, so I'm just trying to keep it as smart as poss.