Waterproof paint for ovens?

[Ramiro]

Hi, I finished building my oven and it's in my backyard, I would like to know if it is OK to paint the oven with waterproof paint, is this paint enough protection for the oven during the rainy season?

Thank you!

[Les]

Re: Waterproof paint for ovens?

ramiro,

Latex sticks pretty good to concrete but a better route is to use an acrylic stucco. You do have it insulated, correct?

Les...

[Ramiro]

Re: Waterproof paint for ovens?

Hi Less, I made my oven with the traditional way that people here in Colombia make the wood fired ovens, a mixture of mud and straw, I didn't insulate it, so when I fire the oven I can feel the heat on the outer walls of the oven, it doesn't get very hot, it feels warm. I finished the oven covering it with thin firebricks (those that are used for the oven floor).

Here there's a waterproof paint used for buildings, but some of them are flamable, so I still don't know what to do....

[Les]

Re: Waterproof paint for ovens?

Here there's a waterproof paint used for buildings, but some of them are flamable, so I still don't know what to do....

Is it flammable after it dries? I wouldn't go with either of my previous suggestions as "warm" is a relative term. I'm stumped - anyone else have an idea other than insulate?

Les...

[Wiley]

Re: Waterproof paint for ovens?

Since you built your oven like the locals do, "in the traditional way" what is the traditional way to waterproof a WFO made of mud and straw in Columbia?

I'm not trying to be smart, just what you are describing is something akin to what I know as a "cob oven" and I have never seen a cob oven that is painted as a means of waterproofing. The two cob ovens I have experience with are usually under cover of a tarp (with lots of venting so the tarp doesn't trap moisture) when not in use. I have seen photos of them built under a protective roof type structure as well.

It will be interesting to see what you end up doing. Please keep us posted.

Bests,
Wiley

[Neil2]

Re: Waterproof paint for ovens?

Acrylic stucco is one way to go. Remember that you will get a lot of expansion / contraction during a use cycle.

This is "water resistant" and will be OK for minor rainfall. In the rainy season, or for prolonged period of non use, I cover mine with a sheet of plastic.

[Les]

Re: Waterproof paint for ovens?

Acrylic stucco is one way to go.

I'm not sure it will handle the heat - this is an uninsulated oven. I checked the spec of the Dryvit I used. All they say is that they passed the ASTM E 84 test. I don't have access to that spec so no clue how hot it got.