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Amount of RTV Moldmaking
Silicone needed to make a mold

Measure Mold Cubic Inches:  Length X Width X Height
If your mold is 10″ X 6″ X 2″ = 120″ cubic ins
Measure Your Part
Your Part is 9″ X 5″ X 1.5″ =  67.5  cubic ins
Take your mold cubic inches   120″ cu in
Less your part cubic inches  – 67.5 cu in
This gives you   52.5 cu in
There are approx 21 grams per cubic inch (453 grams per 1 lb)  x 21 grams
Total: 1,102.5 grams of  RTV needed
divide by grams per lb div by 453 grams per lb
silicone needed 2.44 lbs
2.44 lbs silicone needed

Amount of Polyurethane
Casting RESIN needed to cast a part

Measure Your Part: Your Part is 4″ X 5″ X 3″ = 60 cubic ins
Take your mold cubic inches       60 cu in
There is approximately .550 ounces in one cubic inch of MPK-70 casting Resin   x .550 ounces
Total:         33 oz of material

33 oz resin needed

 

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