Mosaic Stone Mold MS 824 Rubber Molds
Mold size — 2 SQ.FT.(0.18m2) approximate.
Measurements – 23 3/4” X 12 1/2” X 1/2” (60cm X 32cm X 1cm)
Mold sections — 1
How to Cast Mosaic Stone Mold Instruction
We also recommend following materials:
Concrete Release Agent Concentrate
Concrete additive-Water reducer-Super plasticizer
Stone making tutorial
MS 824 Stone-casting
apply release agent
to your mold prior to casting concrete.
MS 824 mold casting weight is about 8.56 lbs. (3.89 kg.)
We use this 1:2 cement to filler ratio mix : (you can also mix 1-part Portland
cement to 3 parts sand [filler], but plasticizer and water has to be
re-calculated by cement weight)
2.85 lbs (1.3 kg) Portland cement (white for light stone colors, gray for dark
(2.59kg) Sand (20-30 mesh recommended. Silica sand or "all-purpose"
sand works great)
11.42oz (0.31 L) Water (We recommend water to be 20%-30% of cement weight.)
(If your mix is too liquid, use less water.)
0.46 oz (12.96 g) Super-plasticizer
(Superplasticizer's dosage rate is 0.5% -1% of cement weight. We are using 1%)
For best result always add dry pigments
to your mix prior to adding the water. Mix concrete with pigment and additives
for a few minutes, then add water (mix at least 3-5 minutes). You can also add
Super plasticizer to the water 10-15 minutes prior to casting, then mix with
Please note: Concrete minimum mixing time is 3 minutes (it takes a few minutes
until Super Plasticizer absorbs into the cement and start reaction)
To color different molds sections, brush oxide pigment over the selected
sections, then cast the concrete.
Cover the mold with plastic while it is curing. Remove the stone from the mold
in 12-24 hours.