Which sealant for window leak? (1 Viewer)

Oct 4, 2022
154
217
Henfield, West Sussex
Funster No
91,710
MH
Autosleeper Broadway
Exp
Newbie
We have an AS Broadway 2015 and bought this time last year.
I noticed recently a few beads of water on the rubber seal inside the rear window and worked out it’s coming from the top of the window where it fits into the frame. For now I’ve just put some tape over to keep the rain out.

On the outside it appears someone has previously sealed it as there’s clear sealant.
I’ll obviously need to scrape this away and reseal
After a search online I’ve come across Soudal all weather sealant.
Is this the right stuff to use? And does anyone know how easy it is to work with?

None of the other windows have sealant on them and don’t leak.
 
Feb 22, 2011
9,105
17,744
Newcastle under Lyme
Funster No
15,397
MH
Hymer B544 A Class
Exp
Since 2015
The only certain way is to remove the window and reseal with non setting sealant.
Just putting more on top of existing will only give a temporary repair and silicone is not recommend at all.
Are you certain it's not condensation ?

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Jammi
Oct 4, 2022
154
217
Henfield, West Sussex
Funster No
91,710
MH
Autosleeper Broadway
Exp
Newbie
Thanks for the response, I was afraid someone might suggest removing the window…
No it’s not condensation as it’s only this one window and once I taped over the suspected area it’s bone dry.
 
Feb 22, 2011
9,105
17,744
Newcastle under Lyme
Funster No
15,397
MH
Hymer B544 A Class
Exp
Since 2015
I've never had to do one, but I don't think they're difficult.
If unsure, post a couple of photos and someone will advise on dismantling.
After that it's just cleaning off the old sealant, applying new and reassemble
 
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Jammi
Oct 4, 2022
154
217
Henfield, West Sussex
Funster No
91,710
MH
Autosleeper Broadway
Exp
Newbie
Ok I’ll have a look when I go over tomorrow and take some photos. There’s no obvious access to any screws.

Would the Soudal All weather be the correct sealant to use? If so I’ll order some ready.
Thanks again

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Nov 13, 2011
1,452
3,300
Lincolnshire
Funster No
18,889
MH
PVC
Exp
30 years
The window will consist of an inner frame and an outer frame which will have the window hinges and stays. They are normally held together by screws from the inside. Access to the screws will involve removing interior trim and/or blinds. Sometimes the screws are hidden behind plastic plugs. Once the screws are removed you will need someone outside to catch the frame. Clean off all old sealant with white spirit or similar. Use a non-setting mastic, it is available in cartridge or tape. When re-assembling, do not overtighten the fixing screws, you will only squeeze out the mastic and/or distort the frame.
While the frame is out have a good look for water ingress damage.

Geoff
 
Jun 30, 2011
7,018
18,886
Barnard Castle, UK
Funster No
17,128
MH
Concorde Concerto
Exp
Since 2007
I used Hodgson Seamseal CV non setting on a roof light which wasn't entirely successful, so I got some of the non setting tape seal which was much more successful.
I’ve used the Hodgsons seam seal CV on quite a few with good success, did yours still leak after re-fitting?

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Jan 11, 2010
2,689
8,819
Chester
Funster No
9,901
MH
Auto-trail
Exp
Well that`s our 13th year & still loving it.
We had the same problem a small amount of water ingress, looked at doing the job myself, found a vehicle repair centre close to home who charged me £150, result I thought, dropped the van off picked it up the next day all done and water tight.
 
Nov 13, 2011
1,452
3,300
Lincolnshire
Funster No
18,889
MH
PVC
Exp
30 years
We had the same problem a small amount of water ingress, looked at doing the job myself, found a vehicle repair centre close to home who charged me £150, result I thought, dropped the van off picked it up the next day all done and water tight.
Not a bad price but I prefer to do all my own repairs. A window remove, reseal and refit would cost me about £4 (for the sealant)

Geoff
 
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Jammi
Oct 4, 2022
154
217
Henfield, West Sussex
Funster No
91,710
MH
Autosleeper Broadway
Exp
Newbie
Thanks all..
I’m thinking I might contact my local repair workshop for a price.
I know it would be cheaper to fix it myself but if I cock it up it’d end up costing more in the long run!
 
Jun 30, 2011
7,018
18,886
Barnard Castle, UK
Funster No
17,128
MH
Concorde Concerto
Exp
Since 2007
Thanks all..
I’m thinking I might contact my local repair workshop for a price.
I know it would be cheaper to fix it myself but if I cock it up it’d end up costing more in the long run!
If you do make sure they are doing it right, taking it out, cleaning old sealant off, then refitting.
 
Jun 16, 2016
10
19
Felixstowe UK
Funster No
43,635
MH
Hymer BC595 Coachbuilt
Exp
Complete newbie
I had to remove and re-seal the rear window on my old Hymer. Water was getting under the external frame and into the roller blind. As donkey says, remove the sealed window unit and then undo the internal screws and push out the external frame. Mine had obviously been bodged a couple of times with silicone and the rubber gasket was missing altogether! I bought a replacement gasket strip, cleaned up the frame and re-sealed with the Dometic Seitz recommended SikaLastomer 710 sealant. That was 3 years ago and it's been bone dry ever since.

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Terry

LIFE MEMBER
Dec 27, 2007
11,866
8,683
Lincolnshire
Funster No
1,075
MH
A class
Exp
Can't remember ;)
As donkey says for removal of window. If it’s hid behind the wall covering you can simply get a tube of Puraflex 40 and seal with that. Remove the clear sealant, mast up and seal👍 Never had one leak in years of use. To do the job “properly “ you should remove window and replace the rubber gasket but most simply stick a load of sealant around and put the window back in without replacing gasket😉
If simply going to seal from outside 👍use masking tape a couple of mm around frame and bodywork. Smooth off with wet finger and pull tapes off immediately after smoothing 👍
 
Aug 18, 2012
96
56
essex
Funster No
22,457
MH
just looking
Exp
im a newbie
We have an AS Broadway 2015 and bought this time last year.
I noticed recently a few beads of water on the rubber seal inside the rear window and worked out it’s coming from the top of the window where it fits into the frame. For now I’ve just put some tape over to keep the rain out.

On the outside it appears someone has previously sealed it as there’s clear sealant.
I’ll obviously need to scrape this away and reseal
After a search online I’ve come across Soudal all weather sealant.
Is this the right stuff to use? And does anyone know how easy it is to work with?

None of the other windows have sealant on them and don’t leak.
I greatly recommend Hippo pro 3 for any sealant or leak fixing jobs . It comes in clear or white . It is tough but flexible and can even be applied in wet conditions . In fact they have a demo that can be found on YouTube showing two bricks being bonded together underwater . It’s got me out of trouble many times .
 
Sep 11, 2020
257
220
Aboyne
Funster No
75,732
MH
Apache 634
Exp
Since 2020
I was nervous about removing and refitting a window. Like the OP I was of the opinion I would just cock it up.

Long story short, after successfully removing and replacing one window, and noting how badly fitted it was, I removed and replaced all six windows.

It allowed me to properly pack them so they were centred in the hole allowing a proper seal.

The hardest part was prising the windows out because of the gunk used to seal them. For the reseal I replaced the rubber seals and used butyl tape, which is much better than the tubes of sealant.

Since doing the windows i have also replaced two skylights with more modern ones including fitting an air max.

The more you do the more confident you will get.

d

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OP
OP
Jammi
Oct 4, 2022
154
217
Henfield, West Sussex
Funster No
91,710
MH
Autosleeper Broadway
Exp
Newbie
I was nervous about removing and refitting a window. Like the OP I was of the opinion I would just cock it up.

Long story short, after successfully removing and replacing one window, and noting how badly fitted it was, I removed and replaced all six windows.

It allowed me to properly pack them so they were centred in the hole allowing a proper seal.

The hardest part was prising the windows out because of the gunk used to seal them. For the reseal I replaced the rubber seals and used butyl tape, which is much better than the tubes of sealant.

Since doing the windows i have also replaced two skylights with more modern ones including fitting an air max.

The more you do the more confident you will get.

d
You’re right, I should at least give it a go!
 
Oct 15, 2007
3,219
5,906
Neckend or North Wales.
Funster No
635
MH
VW T6.1Kombi day Van
Exp
Since 2004

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