Hi,

I'm getting closer to escaping Toronto at the end of October!

I went up on the roof of my motorhome yesterday, and found that it's made out of some kind of sheet metal.

The sheet metal looks like 'new'!

There's a seam line that has gunky looking old dried up white sealant on it.

The sealant is all flaking everywhere ...including all around the roof vents and pipe vents too!

I guess I should scrape off all the old flaking sealant the best I can, and put new sealant on it?

I'm hoping that something like this will seal it all up again?

I can get it at Canadian Tire for $39.99

Here's what it says about it...

• Gardner STA-KOOL Elastomeric Roof Coating provides weather protection, heat reflection and sound deadening for RVs, metal roofs, shingled roofs, built-up roofs and tile roofs

• Beautifies, protects and seals

• Waterproof

• Good low temperature flexibility

• Colour: white

• Available in 3.4 L

.

.

...and here's what I'm thinking to use on the seams that go down along the side of my motorhome?

GE Silicone II (White) Premium Waterproof

I can get it at Canadian Tire for $5.99

Here's what it says about it...

• Mildew resistant
• Outstanding adhesion
• Permanently flexible
• Low odour

PIEERE wrote:

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Stay Kool; Like Kool Seal in the US for on the Roof is great and will last about 5-7 yrs. On the seems I would use EPDM Rubber; remains very flexible is waterproof and will stretch with the movement of the seams; in the tube for the caulking gun, can get on line through Amazon or Camping World.

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 Thanks for replying, Pieere!

Won't the Kool Seal make the roof seam waterproof?

I'm only looking for something simple to seal off the metal roof seams.

I got the Kool Seal now ...but I haven't opened up the can yet.

I'm hoping it's like the consistency of 'tar' so I can just slop it on over the metal seam after I get the metal seam area all clean and smoothed down of the old gunk.

That EPDM rubber is too difficult for me.

The metal sheeting can just remain as it is. - I only want to slop waterproof paste over the roof seams.

...and slop it around the roof vents and roof pipe caps too.

Here is what I am expecting the Kool Seal consistency to be...

DO NOT USE ANY SILICONE................EVER.

For all seams and flashings;
Use DICOR self-levelling compound for flat surfaces. Use DICOR non-sagging compound for anything more vertical.

TRAILERKING wrote:

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DO NOT USE ANY SILICONE................EVER.

For all seams and flashings;
Use DICOR self-levelling compound for flat surfaces. Use DICOR non-sagging compound for anything more vertical.

-- Edited by TRAILERKING on Saturday 15th of August 2015 05:50:47 PM

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(Researched) That sounds like really good stuff, Trailerking

But I don't want to just lay down a 'bead' from a caulking gun along the length of the roof seam, and roof vents and roof caps.

I want to lay a heavy 6” wide strip of waterproofing compound along the roof seam, and roof vents and roof caps.

Is the Sta-Kool consistency as thick as tar?

(I don't want to open the pail of it to see if the consistency is thick or thin like paint ...in case they won't refund if it's been opened, if I find out the consistency is thin like paint.)

-- Edited by Millie on Saturday 15th of August 2015 08:57:24 PM

-- Edited by Millie on Saturday 15th of August 2015 08:58:37 PM

If you are wanting to do a 6" wide strip along a seam............Another option is Eternabond. You need to get it down right the first time because you will not lift it off. It sticks PERMANENTLY.

http://www.eternabond.com/default.asp

Millie,  If you go to the manufacturer's website <http://www.gardner-gibson.com/Media/project-how-to's/how-to-apply-elastomeric-roof-coatings.pdf?sfvrsn=2> there are some how-to instructions on the application of Sta-Kool.  I don't think that it looks as thick as you were hoping for.  Check it out and see what you think.

I think that Trailerking's suggestion of Eternabond is a good one.  I wouldn't go quite so far as to say it's permanent but it will last for quite a while.  I'd go ahead with your plan to remove as much of the old loose sealant as you can, then follow the instructions for the eternabond (i.e. cleaning the surface before you apply, etc.).  Eternabond comes in several different widths so you can pick what you think is appropriate.

Good luck with your project!  Maybe post pictures when your done :)

Millie - Just another thought with regard to the Dicor self leveling sealant.  You said that you didn't want "lay down a bead from a caulking gun" and I understand what you mean but with the self-leveling dicor you can cut the tip of the tube very wide and then place thick beads next to each other and they will self-level into one wide strip.  It will end up looking very much like the picture you attached to your post above.  Hope this helps.

This is also a decent product. Lots of work to do it properly.
http://www.rv-armor....CFQYoaQodspoOsQ

That's other than doing a total strip and re-roof.

I think in this case you need Flexible RV Roof Coating than usual sealant. Sometimes it's more reliable. And also it can waterproof you roof and it's really important.