To underseal or not to underseal, that is the question?

[In the Pink]

To all you knowledgeable folks out there. What are the pros and cons of underselling your van??
Is it worth doing? Is it just a ploy used to hide something?
Your thoughts would be appreciated
TIA

 

[The general]

What mh have you got ?

 

[Guigsy]

If it's a Ducato chassis, they are pretty rust free. Only bit that's rusted on my 2007 is the tow bar and a couple of brackets under the bonnet that hold the battery and washer bottle.

 

[Glas Robin]

Chassis may be fine, but I was wondering if it was worth doing because of the wooden base. Even though this is painted with something already.

The danger of sealing anything is if water does get in, it gets trapped which can cause more damage.

 

[HandyAndy]

Don't underseal, it's hideous stuff..
Spray this in the cavities http://www.buzzweld.co.uk/buzzweld-zero-prep-clear-coat-cavity-wax-internal-external.html

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[ShaKen]

Well I chose to get my MoHo undersealed from new.

My thinking:

• Well I intend to keep the van for a lengthy period of time (5 to 10years I’m guessing), and thus having an improved corrosion protection must be useful.
• They’re lots of “interesting” components / running gear on a MoHo, way more on my cars which have numerous under shields.
• Commercials vehicles are generally not thought of as having excellent corrosion protection (loads of rusty vans on the road).
• In the scheme of things, the cost to underseal my MoHo was a tiny percentage of the overall cost - I was spending a lot of money so why not spend a little more as a bit of an insurance policy.
• And it may improve the resale value if/when I decide to sell - certainly it will show that I look after my MoHo.

Did I absolutely need to get it done? Who knows / probably not. But it’s done now and I can sleep a little better than my “investment” is better protected.

 

[Sundowners]

Our flair was waxoyld when new (I think?) And the underside is like new, no corrosion any where------- I look underneath every year while its being mot'd and it continues to amaze me!!!!------ in my opinion waxoyl or similar are well worth the effort/cost!!!!!!

 

[Glas Robin]

Our flair was waxoyld when new (I think?) And the underside is like new, no corrosion any where------- I look underneath every year while its being mot'd and it continues to amaze me!!!!------ in my opinion waxoyl or similar are well worth the effort/cost!!!!!!

Is it just the metal chassis that is waxoyld or the whole of the floor?

 

[Carolyn and Kev]

We have always had ours done regardless of make or type to be honest. Kev always uses a wax oil type of product that he spends the day on getting it done ! He tries to get in all little holes and crevices! Often comes out looking like something from a bog!
I know we have had a few incidents with damp in the past but not due to what he has done.
The latest addition to the motorhome collection we have had has also been done but by the original owner. Kev has said that the underneath is as good as it was when it came from the dealers! Everything is either wax-oiled or copper greased !
It keeps the value where you need it. It does no harm ...I know this ...Kev is a serious anorak when it comes to looking right! Bless him!

Carolyn

 

[Sundowners]

As far as I can see, the whole underside??

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[Silver-Fox]

The problem with underselling the underneath is the water that comes in through the roof won’t run out through the floor ?

 

[PeteH]

Used Dynax S50 on and injected into the Triumph Chassis, It was a recommendation from the Triumph "Community" online and on several other "Owners" sites too.

 

[Jill]

My OH did both our Transit work van & Burstner (Fiat) within weeks of buying them new. When he served his time at a Ford main dealer (40 years ago) every new vehicle was treated before leaving the showroom. Living by the coast we've had 3 & 4 year old vehicles coming through the garage and fail their mots due to corrosion. Stops the rot.

 

[Cheshirecat57]

Is under-sealing not a bit "last century" with modern production levels? Or SHOULD I be living in the past??

 

[In the Pink]

Thanks everyone for your replies.
More for it than against it....

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[Allanm]

Not sure if underselling the chassis on a coach built is necessary, the first things to go will be the cab sills if the drain holes get blocked, so I would concentrate on those first.