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Thread: Fastset Mortar Mix - How many layers to apply?

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MikeM670 Fastset Mortar Mix - How many... January 13th, 2011, 02:55 PM
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  1. #1
    100+ Post Member MikeM670's Avatar
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    Default Fastset Mortar Mix - How many layers to apply?

    I have been constructing a rock background with construction foam covered with Fastset Repair Mortar Mix and Acrylic Fortifier. How many layers of the mix should I apply to the background. I have 2 on it now and it looks very good. The coverage seems very good.

    Also I would like to give the mortar mix some color to simulate rock better. Any recommendations on what type of acrylic paint to use? I have tons of acrylic craft paint at my disposal. The type of paints you can get at Hobby Lobby or Michael's. I will be applying a thing wash of the paints to bring out the highlights.

    Mike

  2. #2
    onedge30
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    Default Re: Fastset Mortar Mix - How many layers to apply?

    Pics, pics, Mike. We all want to see what you are talking about.

    I would think 2 layers would be enough. 3 to be totally covered. They do make powdered colors to be mixed in with the mortar. But acrylics should be fine.

  3. #3
    100+ Post Member MikeM670's Avatar
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    Default Re: Fastset Mortar Mix - How many layers to apply?

    I'll try and get a picture or two up. I ended up applying three coats of mortar mix. I also just applied some black aquarium silicone to the bottom and edges of the pink foam to hide the color as well as help keep the cement from scratching the glass. I still need to seal the back side of the rock face to seal the foam.

    Trying to find what type of acrylic paint would be the best. There is just so much information out there, its hard to seperate the junk from the valuable information. Just try researching silicone for aquariums or terrariums. Some say GE SIlicone 1 is ok some say 2 is better. Some say don't use it at all. I purchased some and after getting home relized it says not for aquarium use. In more reading I have seen that aquarium grade silicone has a higer tensil strength then the GE 1 or 2 stuff so they won't recommend it. In my application I don't need the strength ai just want it to be safe to use.

    Mike

  4. #4
    onedge30
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    Default Re: Fastset Mortar Mix - How many layers to apply?

    Any acrylic paint will do. I would use the cheap non-toxic craft paint.

    I have used the general GE silicone to repair tanks for years. The key is to let it completely cure for maximum strength. Which if it is decorative, you just have to wait 24 hours. The only difference that I could find between GE 1 kitchen/bath or window/door is the the later is incidental food contact safe.

  5. #5
    100+ Post Member MikeM670's Avatar
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    Default Re: Fastset Mortar Mix - How many layers to apply?

    I picked up some acrylic patio paint this afternoon and have started to paint/stain the mortar mix. I watered down the paint so it was more of a wash then straight paint. It's easier to add more then try and remove paint if there is too much. ( Guess my scale model building skills come into play here). The one thing I noted is that the mortar mix darkened and really absorbed the water. So this got me thinking about whether I needed to seal the concrete to make it waterproof? If so what product is safe to use?

    Mike

    P.S. No pictures yet.

  6. #6
    onedge30
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    Default Re: Fastset Mortar Mix - How many layers to apply?

    Acrylic polyurethane, I would think. Check to make sure it is non-toxic.

    Now this is for a vivarium, but will not have any water against it 24/7?

  7. #7
    flynmnky
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    Default Fastset Mortar Mix - How many layers to apply?

    Ha! Funny, well maybe somebody like me will read it later.

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