Re-sealing roof with Dicor

dryfly wrote:

Cloud Dancer wrote:

John&Joey wrote:

Cloud Dancer wrote:
Why do people keep using such a product as self-leveling Dicor? ...

Same reason the maker of the coaches do. Last 10-15 years, reasonable priced, and isn't labor intensive.

The Dicor failure rate is on coaches that are not maintained and the roof is 10-15 years old. Cracks have formed and water got deep enough to get under the caulk.

On a 10-15 year old coach does it really make sense to put a 30-40 year repair job on? That RV may only last another 5-15 years. JMO

Here's the problem, the water does NOT get under the Dicor self-leveling caulk. And, neither is this caulk water soluble. What actually happens is that this caulk cracks right at the seam line, and the water gets all the way under the roof to the inside. IMO this Dicor product gets rock hard and its bond is so good that it takes forever to get it off (hammer and chisel). But, if you leave the caulk on and just "V-out" the caulk down the seam line and then fill the groove with 3M 4200 marine sealant,....it'll form a dam for the water to collect.
BTW down here in the sunbelt, Dicor self-leveling caulk cures rock hard and cracks in just 2-1/2 years. I certainly would never ever use it.
If I had to fix a rubber roof, I would replace the entire roof, and then fix the joint around the perimeter MY WAY.

I did not intend to start a debate as to the most effective sealant, and I admit there may well be better solutions than Dicor self leveling sealant. But as I mentioned in my OP my trailer has been exposed to the Texas sun for 5 summers and I really can't say the original Dicor sealant is that bad.

It is not hard yet but obviously will eventually get that way. Yes, it has some surface cracks but certainly nothing that would appear it is close to causing a leak in the roof.

I'm going back with the Dicor sealant simply because it's the easiest, cheapest solution. If it lasts another 5 years the trailer will be someone else's problem Eternabond tape is a little too permanent for me personally.

You can do a very professional job with Dicor. Just clean the roof with 1c bleach, 1c dawn dish washing liquid to 5 gallons hot water. Scrub the roof and seams with a medium brush. The roof will be spotless. Scrap off any loose caulking. Apply the Dicor over all the seams and all of the old calk. After the new Dicor is on smooth the soft Dicor with mineral spirits. It will look very professional. If you have any rot or large holes use the eternabond tape and make sure it is applied with pressure. Put Dicor completely around the eternabond. You will be very surprised. The job should take 12 to 20 hours to do correctly.
MM49