How to cast GlobMarble brick stone mold

How to cast GlobMarble brick stone mold

BS 611 mold casting weight is about 12 lbs. - (5.45 kg.)

Always apply release agent to your mold prior casting concrete. Recommended Sprayer.

1x2 cement to filler mix ratio. You can also mix 1-part Portland cement to 3 parts sand (filler), plasticizer and water has to be re-calculated by cement weight

  • 4 lbs. (1.8 kg) Portland cement (white for light stone colors, gray for dark stone colors)
  • 8 lbs. (3.6 kg) Sand (20-30 mesh recommended) (silica sand or "all-purpose" sand works great)
  • 0.8 lbs. (363 gr) Water (4lbs. of cement x .20) (recommended water to cement ratio 20-30%) (Lower water ratio if your mix too liquid). If your sand is wet, add 50% of pre-measured water, mix concrete than add remaining water if needed
  • 0.040 lbs (18 gram) Super-plasticizer (4 lbs. (1.8 kg) of cement x 1%)

For best result always add dry pigments to your mix prior adding a water. Mix concrete with pigment and additives few minutes, then add water (mix at least 3-5 minutes). You can also add Super plasticizer to the water 10-15 minutes prior casting, then mix with dry ingredients.

Please note: Concrete minimum mixing time 3 minutes with hand mixer and minimum 5 minutes with mortar mixer (it takes few minutes until Super Plasticizer absorbs to cement and start the reaction).

To color different molds sections, brush color over the molds selected sections, then cast the concrete.

Cover the mold with plastic. Remove the stone from the mold in 12-24 hours.

GlobMarble Stone Making Instruction