What is a GOOD sealant/caulk for the edges of our roof??

doodlebug52 · 12-13-2009, 12:25 PM

Uh oh. We now have a leak where the rubberized roof meets the metal outside right above our bed pillows and it's dripping in the storage area above us.

(We have a 1997 Jayco 5th wheel)

When I first joined here awhile ago, I had asked about a good caulk, and someone recommended Dicor's caulk. So I just now did a google search and found Dicor Lap Sealant. I'm assuming that's what I'm supposed to get, but the shipping is HORRIBLE!! $9 or $11 so far for ONE tube which costs less!

No way.

Since we are parked in an RV park in a small town, and do have some local hardware stores, can someone recommend an alternative??? I was told not to use silicone. So what do I look for that might be common in a hardware store??

drip, drip, drip, drip

W4RLR · 12-13-2009, 12:31 PM

Look for an elastomeric lap sealant. Do not use a petroleum based lap sealant or regular silicone caulk. Lowes sells an elastomeric sealant in their roofing department. Look to see if the product is safe on EDPM roofing products.

EngineerMike · 12-13-2009, 12:55 PM

If you haven't been up on the roof yet, you may discover it isn't the seam. It is easy for a branch to spike a hole in a rubber type roof that you only discover once it starts raining. For a small hole, a float of the Dicor type sealant will work. for a tear you may need a patch.

Ray,IN · 12-13-2009, 05:33 PM

I too use a store-brand (Dicor type) sealant. You can buy either self-leveling or non-sagging sealant. Buy the one you need, self-leveling cannot be used on anything except a horizontal surface.

Water leak entry points can be very difficult to locate. I had the Sealtech Manufacturing Inc. - RV leaks bubbles recreational vehicles
system used on our RV to locate leaks when it was new. The operating technician located 3 water leaks. One I had found inside, he located the entry point about 14' from where it showed inside.