Installation Guide

Casting Solid Sphere
1. Place the mold on a round container (bucket
works well) this will keep your mold steady
2. Fill the mold in quarters, bouncing and
taping in between to spread the concrete
inside the mold and to drive out all the air
bubbles
3. Once mold is filled smooth the concrete
with a straight edge/trowel
• Prepare the molds using a lubricant or a mold
release. This will help in removing the casting from
the mold later and may extend the life of the mold
itself. Mix the concrete according to the instructions
from the concrete manufacturer, mixing a small
amount of water at a time until you achieve a
consistency that is well mixed, and is thick, not runny;
similar to the consistency of crunchy peanut butter.
Items Needed:
*History Stones half round molds
*mixing tub or wheelbarrow
*mixing tool, i.e. small shovel
or garden hoe
*lubricant (vegetable oil cooking spray)
*Ready Mix concrete to create two halves: 10”
sphere 35 lbs, 12” sphere 45 lbs, 15” sphere 75 lbs
*Thin Set Mortar 2 lb
Filling Molds
See Step by Step Process Online at http://www.youtube.com/watch?v=koMsdirTggQ
(copy and paste URL into your computer’s browser)
Instructions
Concrete Sphere
Using History Stones Half
Round Molds
Unmold Half Spheres
• Gently turn the mold upside down onto a soft surface, like grass or a piece of carpet , and pull sides away very gently
from concrete and tap lightly on the back. If the mold is stiff you can soften the plastic a bit by setting it in the sunlight
to warm it up. Do NOT rest filled mold on lip when turning over, this will damage mold.
• The concrete will continue to set up for 5 more days so be gentle with handling until it is fully cured.
• Clean the mold immediately after use and store the molds out of the sun.
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• Sponge water onto flat side of your half balls then apply a thin, even coat of mortar
• Press two halves together
• Clean any squeezed out mortar between the joint
• Once the joint is dry you can use sand paper to smooth it further if needed
Mortar Halves to Create Sphere
Option: If you are casting two sizes of half balls you may take
advantage of casting the second half inside the bigger one. This will
make the ball hollow, save material and make the ball lighter weight.
Casting a Hollow Sphere:
1. Pour larger mold 2/3 of the way full. 2. Lubricate small half round
mold and press it inside of the large ball to create the hollow space.
3. Continue to fill larger mold to top if needed 4. Twist the smaller
half round mold after one hour to just loosen it from the concrete. 5.
Remove smaller mold in two hours, and let concrete continue to set
up for 24 hours
Allow concrete to set up in the mold
for at least 24 hours