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Subject Topic: Which sealant? Post Reply Post New Topic
seamonster
03/7/2010 at 9:52pm
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I'm about to replace the side marker light on my 1995 ABI Dawnstar caravan and wonder what sealant to use. I plan to use Sikaflex, either 221 or 521. Which is the better? Does it matter? (the 221 seems to be cheaper...). What's the difference between the two? I need to know asap as we're away on our jollies soon and I want to get the work done before then. Please help!
Sean

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Peace...


Personmichael
03/7/2010 at 10:52pm
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click on

Sikaflex 512 Caravan
74 Purpose-designed Adhesive and Sealant for Caravans, Motorhomes and Trailers
Order no.: SIKA512 Price: £ 7.49



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


PersonOpensauce
04/7/2010 at 8:22am
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521 is non yellowing & uv resistant, hence higher price. 512 is good as well. All much of a muchness for your purposes. They are all polyurethane based sealant/adhesives. When buying, check sell by date as shelf life is short. Don't buy cheap offers past sell by date as the stuff becomes unusable quite quickly.


PersonRune Caster
04/7/2010 at 10:32am
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The 221 is Sika's standard one part polyurethane adhesive sealant.

The 521 is the hybrid version of the 221 containing extra resistance to UV breakdown.

Both set when exposed to moisture in the air, in hot dry weather it may be an idea to give a misting of water to the join. Setting times varies between 10 minutes and just over an hour

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Caravanning is a way of getting a cheap holiday out of an expensive hobby

rune@tabbytha.com


PersonBMW530d
05/7/2010 at 9:20pm
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Anyone tried CT1 ? Opinion, experiences etc


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PersonRune Caster
05/7/2010 at 10:22pm
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Quote: Originally posted by BMW530d on 05/7/2010
Anyone tried CT1 ? Opinion, experiences etc


Reading the data sheet I would not bother using it for caravans - longer cure time and more expensive than Sikaflex or Tigerseal

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Caravanning is a way of getting a cheap holiday out of an expensive hobby

rune@tabbytha.com


seamonster
06/7/2010 at 9:20am
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Quote: Originally posted by Rune Caster on 04/7/2010
The 221 is Sika's standard one part polyurethane adhesive sealant.

The 521 is the hybrid version of the 221 containing extra resistance to UV breakdown.

Both set when exposed to moisture in the air, in hot dry weather it may be an idea to give a misting of water to the join. Setting times varies between 10 minutes and just over an hour
Thanks for the advice!
521 it is then...


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Peace...



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