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Molding A Freehand Concrete Planter / Birdbath
Occasionally I get the incline to mould Concrete freehand using a pre-existing form as a base mold. I came across this large wood bowl at a garage sale a few years back and it makes a great form for both a planter pot or birdbath. You can use any type of bowl you may have. Can be formed on the bowl upside down too. If you don't have release agent you can line the bowl with plastic. A plastic bag cut open will do. Mix needs to be on the dry side. Can also be used with hypertufa. These casting go great in the garden. No need to spend big $$ on molds. The second video is a plastic watermelon bowl.
Nothing fancy. Completely functional.
Here is a video
Freehand concrete planter ( photo / image / picture from GunZ McGraw's Garden )
Last edited: Sun Mar 17, 2013 11:51 pm
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I have a good sized wooden bowl and, now that I've seen your video, I think I'll attempt to make some concrete mushroom with mine for the garden.
Thats a great idea. Post some pics when your done. Don't forget to use release. You can mix up 1 part castor oil to 8 parts methyl hydrate in a spray bottle. Shake well and spray. Or you can just cut open a garbage bag and use it as a liner.
Great idea. How long does this have to cure? Hypertufa takes a long time. Almost too long to be usable this year.
You can demold in 24 to 30 hours. They say concrete takes 30 days for full cure for but I use it after 7 days.