Old 10-18-2008, 07:26 PM
Join Date: Oct 2008
Location: Australia
Posts: 1
Default Can I seal the Exterior of my oven?

Hi guys,

I've built an oven myself from scatch using a relatively cheap method, which in short has a clay shell, with other layers of insulation over the top. I avoided the brick ovens because i didnt think i would be able to do the block work,


my question is based on the finish coat of my oven which is a thin brushed on layer of sieved sand, cement and clay, with a little oxide for colour. I have since found out that this layer is not weather proof. when it rains, it seems to slowly wash off this thin layer.

can i use a comercial type sealer to possibly fix this problem? can you think of any problems that this may cause on my oven. ie chemicals near food??? is this a a big no no.

I hope you can help me

kind regards to all
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Old 10-19-2008, 05:00 PM
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Les Les is offline
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Default Re: Can I seal the Exterior of my oven?

I suggest that you just cover it with an acrylic stucco - thats the route I went. The stuff is bullet proof.

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Old 10-20-2008, 02:59 AM
Join Date: Sep 2008
Location: Melbourne, Australia
Posts: 45
Default Re: Can I seal the Exterior of my oven?

I'm using an acrylic stucco called, "Multitex". Like Les says, it's bulletproof!
It can be tinted to a suitable colour or it can be painted over with something like Dulux Tuscan or Solaguard Stone Finish.
I'm also in Oz, so I know you'll be able to get the products.

Last edited by Balthazar; 10-20-2008 at 03:15 AM.
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Old 10-21-2008, 03:47 AM
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Location: Townsville, Nth Queensland,Australia
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Default Re: Can I seal the Exterior of my oven?

Try what they call flexible pointing. It is a flexible acrylic that will withstand the expansion created from the heat. It is hard to apply but I found it easier to thin it down with water and apply it like a thick paint, about three coats to give you about 3-4 mm total thickness. The stuff is designed for sealing terracotta or concrete ridge caps and is a standard roof tilers item. Wait until your oven is toally dry (say 5 cooking firings after your curing fires) You don't want to lock in the moisture.
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