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wet room sealant


Champstar

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that easyseal stuff is meant for exterior use (ie roofing applications) ??

 

Best sealant i have used is always a silicon, then its down to make. I have been using dow corning for years now and found it superb, and doesnt get any mould in it. Although saying this, I only ever use it in household bathrooms

 

http://www.screwfix.com/prods/58308/Bathrooms/Bathroom-Sealants/Dow-Corning-785-Sanitary-Sealant-White

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The problems with using common-or-garden 'DIY' silicone sealants in a motorhome bathroom are a) that it's not easy to obtain good sealant-adhesion to the materials motorhome converters employ and b) there is much more movement in a motorhome's body than in a house.

 

I'd use a polyurethane adhesive/sealant like SIKAFLEX-512 CARAVAN (as long as white is the colour required), though I chose a similar product from Henkel Loctite when I re-sealed my Hobby's shower compartment as that's what Hobby use and I needed to match the non-white colour. This stuff is trickier (and muckier) to apply than ordinary DIY 'bathroom' sealant, so it ain't recommended for the ham-fisted. But it sure does stick!

 

It does need emphasising that, whatever sealant is chosen, preparation is all-important. If you don't get the surfaces involved 100% clean before applying the sealant, then you may as well not bother.

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Graeme:

 

If you GOOGLE-search pages from the UK, using the search-term "sikaflex 512 caravan", you'll find it's fairly widely available. For example:

 

http://www.marinemegastore.com/product-product-BUR_100512.htm

 

Coincidentally, there is an article in the August/September 2008 issue of the French motorhome magazine Le Monde du Camping-Car on re-sealing water-proofing joints as found in wet rooms. This suggests silicone as a sealant or Sikaflex 221. According to SIKA's product catalogue, 221 is similar to 512-Caravan but is offered in a wide range of colours. It may be less UV-resistant, but that shouldn't matter when 221 is used within a vehicle.

 

I'm going to say again that, if you use a polyurethane sealant like Sikaflex 221 or 512, there's much more scope for ending up with an ugly finish as the adhesive isn't 'clean' like silicone and takes much longer to cure. When I re-sealed my Hobby's shower-compartment I used masking-tape for all the joints and the task involved several phases. I'm sure the guys in the Hobby factory do the sealing in one quick fell swoop and can achieve a pretty good finish, but that needs practice and confidence.

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