Rose, the first question I would have to ask is, when was the last time
the sealents that are installed were replaced? Most RV manufacturers
encourage the owner to at least inspect the seals annualy and replace
them if they appear to be breaking down. Like any product produced
today, it doesn't have infinite life. It must be maintained. If they,
or you, are not in a position to do the inspection and or replacement,
then you'll have to find a reliable RV repair shop to do it for you.
Since it is a time consuming job, it's not going to be an inexpensive
undertaking. Depending on the type of roof that is on the unit, there
is a product on the market called Eterna Bond which I have been using
for several years now. I had some leaks that were driving me bonkers. I
tried all sorts of sealents and still the leaks persisted. Put Eterna
Bond on the seams and haven't had a leak since. It's an extremely
sticky but very strong tape. Once it makes contact with the surface,
it's there, your not going to move it. But it really does a great job
sealing the seams. It's purported to have an extremely long life. I'll
will say that it's not the cheapest product on the market but when you
consider how much is spent on stuff that doesn't work, it's worth the
money. (PS, I AM NOT an agent for the company nor do I own stock in
it!) If you contact them, they will gladly provide you with samples for
free. Here's their online address:  http://www.eternabond.com/
Good luck,
Bob in Sacramento.

Rose, the first question I would have to ask is, when was the last time
the sealents that are installed were replaced? Most RV manufacturers
encourage the owner to at least inspect the seals annualy and replace
them if they appear to be breaking down. Like any product produced
today, it doesn't have infinite life. It must be maintained. If they,
or you, are not in a position to do the inspection and or replacement,
then you'll have to find a reliable RV repair shop to do it for you.
Since it is a time consuming job, it's not going to be an inexpensive
undertaking. Depending on the type of roof that is on the unit, there
is a product on the market called Eterna Bond which I have been using
for several years now. I had some leaks that were driving me bonkers. I
tried all sorts of sealents and still the leaks persisted. Put Eterna
Bond on the seams and haven't had a leak since. It's an extremely
sticky but very strong tape. Once it makes contact with the surface,
it's there, your not going to move it. But it really does a great job
sealing the seams. It's purported to have an extremely long life. I'll
will say that it's not the cheapest product on the market but when you
consider how much is spent on stuff that doesn't work, it's worth the
money. (PS, I AM NOT an agent for the company nor do I own stock in
it!) If you contact them, they will gladly provide you with samples for
free. Here's their online address:  http://www.eternabond.com/
Good luck,
Bob in Sacramento.

Most of your RV dealers have Roof Tape in white and Aluminum finish.
My RV is 22 years old. Just started to have some minor leaks. Cleaned
the roof and applied the tape. No leaks. Cost about $32.00 for 2 rolls.