Difference between fibered/non-fibered roof covering?

Question:Hi, my Dad recently had our roof redone-about 3 months ago, and now he wants to get Aluminum Covering. A friend suggested Karnak 169, but it's incredibly expensive. A guy from the store suggested Karnak 97, since it's less expensive and that one's fibered. I'd like to know the difference between fibered and non-fibered roof covering, and which one should I go with, and how long you think it lasts.
Please answer as soon as possible, and any and all help is appreciated!
Thanks!
~Mary

Answers:
Non fibered roof coating is more like a paint. It may be a bit heavier than paint, but otherwise very similar. It will put a surface film on the roof that will change the color and protect the roof from decay. In the case of aluminum color, it will also provide a reflective surface that will lower the temperature inside slightly.

Fibered roof coating has tiny fibers mixed in with the coating. The fibers help fill tiny cracks and holes in the roof to seal leaks. It will also protect the surface and reflect some heat. The color of the fibered is usually not as "clean" as the non-fibered.

Fibered roof coating can cause some problems. The fibers can collect and create tiny pockets that will hold water if you are not really careful when applying. The pockets of water can freeze and thaw causing separation of the coating from the roof. This can cause new leaks over a period of time.

As a general rule, fibered coating should only be applied to roofs that have leaking issues, and then very carefully.

The fibered is generally cost less per gallon (or 5 gallon) than the non-fibered, but the non-fibered covers much more area per gallon. The net result is often that enough fibered coating costs more than enough non-fibered to cover the same roof. Just because the non-fibered costs more per bucket does not mean that it will cost more to cover the roof.