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Subject Topic: W4 mastic in the cold/damp Post Reply Post New Topic
Person2wet2camp
21/1/2013 at 8:01pm
 Location: West Mids
 Outfit: Elddis Crusader Superstorm View 2wet2camp's Profile View Profile   Reply to 2wet2camp Reply   Quote 2wet2camp Quote  
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We have our caravan on a season pitch, and just as were ready to leave on Sunday noticed that one of the Heiki Rooflights was leaking

As it was too late in the day, and starting to snow again, we dried off as best we could and covered with tarpaulin. I plan to go up in a couple of days to take the rooflight out and refit using W4 mastic tape but not sure about the weather.

If it is cleaned off, and dry, is it okay to fit if it is cold/damp on the day? Can't afford to wait until a fair day! If I do fit it and it rains half hour later will it be okay, or does the mastic have to "go off" to seal properly?


Personjeff juke
21/1/2013 at 10:34pm
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If you can, use an old hair dryer to heat it but,be carefull of the weather as electic and water dont mix..!!!

It will be fine after fixing no need to worry about the weather..

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Animals have feelings..

JEFF................


Personmichael
21/1/2013 at 10:34pm
 Location: Lancashire
 Outfit: Caravan now Sold View michael's Profile View Profile   Reply to michael Reply   Quote michael Quote  
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its a non setting mastic and quite sticky  BUT the roof must be clean and dry as new sealant will not stick top old,see

http://www.bailey94.co.uk/heki_bathroom.htm

http://www.bailey94.co.uk/heki-rooflight.htm



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the only silly question is the one you do not ask.


Person2wet2camp
22/1/2013 at 12:43pm
 Location: West Mids
 Outfit: Elddis Crusader Superstorm View 2wet2camp's Profile View Profile   Reply to 2wet2camp Reply   Quote 2wet2camp Quote  
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Thanks for the replies - looks like it will be the weekend before I can get back up to fix, just hope weather (and tarpaulin) holds out until then.

W4 mastic tape (both widths) ordered, and looks reasonably straightforward (famous last words).

Plan was to dry out with hairdryer as suggested, remove, clean with white spirit/meths as suggested and refit. All sounds too simple to be true!!!

My main concern was if it started raining 10 minutes after fitting (or knowing my luck 10 minutes before I finish cleaning off the old mastic !


PersonLawrenceR
22/1/2013 at 4:20pm
 Location: St Helens Lancashire
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No need to worry, once the mastic is applied (as previously stated to a dry caravan) it is good to go.

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Lawrence


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Personbeecherk
22/1/2013 at 9:38pm
 Location: luton
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There is a new mastic called CT1 saw it being used the other day and its the nuts, seals glues and is gap filling can be used in the wet,

Kevin

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camping low monte in Spain March 2016


Person2wet2camp
27/1/2013 at 4:45pm
 Location: West Mids
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Things didn't go to plan - after two of us spending more than two hours cleaning the roof and rooflight, we put on the W4, overlapping at the corners as suggested. Installed and clamped, left for 10-15 minutes and then final tighten. Left it an hour, and put small amount of water on roof using watering can to test. And then watched as the water dripped into the van

As it was 4pm and heavy rain forecast from around 6pm, quickly taken out, cleaned again and installed using a tube of IDL99 from the site shop. Clamped, watched as half of it squirted out the sides, and sat and waited.

After 6 hours of heavy rain, all dry inside :-)

In future the cheaper (albeit slightly messier) IDL will be used. Now just have to try Ebay and get some money back on the 2 and 1/2 rolls of W4 that I don't need!


Personjeff juke
27/1/2013 at 8:35pm
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Im not a really big fan of that tape and do prefer a sealant myself.IDL 99 is good for leaks but the oil in it evaporates and it turns to a powder after a good few years and,being used on the roof the heat from the sun could make it evaporate quicker..well thats my theory.

Ive come across this with vans i have bought and resealed whether needing it or not. Sikaflex is the way to go these days.

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Animals have feelings..

JEFF................


Person2wet2camp
27/1/2013 at 8:57pm
 Location: West Mids
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I went with the tape as it does seem to get decent reviews from people, and looked to be fairly hassle free and non messy. When that didn't work, IDL was all I could get.

It does seem to have done the trick, and I'll hopefully change the van before I have to take it back off!


Personrob.i
30/1/2013 at 5:48am
 Location: lancashire
 Outfit: freedom microlite sport View rob.i's Profile View Profile   Reply to rob.i Reply   Quote rob.i Quote  
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Quote: Originally posted by beecherk on 22/1/2013There is a new mastic called CT1 saw it being used the other day and its the nuts, seals glues and is gap filling can be used in the wet,

Kevin

I,m another fan of CT1and as beecherk says it will stick even in the wet and the bond is unbelievable and can be painted over .I am a joiner/ builder and use it for sealing and sticking many things


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who,s turn is it to brew up



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