Roof sealant question

[Blackcvpi]

Hello all!

I have a 2005 Surveyor sv210. It has a rubber roof and I noticed that some of the sealant around the vents and end caps is starting to crack. Its not real bad but it is cracking. I have not been able to find any evidence of water leaks inside so I would like to fix this before it get worse.


I visited a local RV dealer and the parts department recommended hengs rubber roof coat to put over the cracked sealant instead of using more lap sealant. I was told you can't put new lap sealant over the old stuff.

I am trying to avoid a full scrape and reseal till this time next year....any input on the best solution would be very helpful.

-Matt

[Wayne Pryor]

We caulk over old sealant a lot to get through some bad weather or until we can remove and reseal properly. This time next year would be a stretch unless you check it every 30 days or so to make sure things are OK. Use Dicor 501LSW self leveling.

[Blackcvpi]

The weather out here in Southern California does not get to bad....its all rain. I think it will be ok till next year if I can seal the cracks.

Does Forest River use Dicor lap sealant and will new Dicor lap sealant stick to the old stuff?

[Ray,IN]

Originally Posted by Blackcvpi

The weather out here in Southern California does not get to bad....its all rain. I think it will be ok till next year if I can seal the cracks.

Does Forest River use Dicor lap sealant and will new Dicor lap sealant stick to the old stuff?

Yes it will stick - IF you follow the application instructions. Dicor sells a primer/cleaner for this purpose.

[phlyphyshr]

Use Eternabond to reseal the seams and vents and never have to do it again!
Just make sure you follow the instructions.

[Ray,IN]

Eternabond also requires their primer for best adhesion.

[LadyFitz...]

Originally Posted by Ray,IN

Eternabond also requires their primer for best adhesion.

If the surface is perfectly clean and dry, the primer isn't required. However, the primer does help to ensure a better chance at good adhesion, especially if conditions are less than ideal. Also important is to use plenty of pressure to ensure adhesion.

[GPW]

I used Eternabond tape on my TD roof ... cleaned first with Acetone , then pressed/rubbed it down well with a big spoon ... No problems ... No leaks ...
But if you’re going over a protruding screw head or something , take special care to press it down securely all around the protrusion ... I used a heat gun and extra pressure and it really stuck in those areas ...
Sat out all summer in our intense Heat and storms ... no problems ... I will Never use a silly sealant like Dicor again that doesn’t last and must be inspected monthly ... I think the only reason the manufacturers use it is because it’s Cheap (in large quantities) and easy (quick) to apply ... But then it seems the Industry is all about Profits now , rather than making a Good problem free RV !!!

[Blackcvpi]

Well I went with Dicor. Did a complete scrape and reseal.

The original sealant lasted about 6 years in my climate so I figure I will be OK for a while.

Next time I will look into the Eternabond tape.

Thanks for the input everyone