Resin casting question - amount of Alumilite needed?

[Matt T.]

I'm thinking of casting copies of a NASCAR nose I modified. It will be from the top of the wheel openings, forward, no hood.

Will the Mini Casting Kit at Hobby Lobby have enough material? It lists "4-ounces of quick set silicone rubber &
8-ounces of casting resin" on the desription online.

Thanks!

[Lunajammer]

A couple things that can help...

If you have an accurate measuring cup with ounces listed you can figure out the volume of your nose part. Fill it to a certain level with water, then insert the nose. How many ounces of water it displaces will tell you how much resin you'll need.

For RTV, roughly figure the size of your mold box around your part and measure. Volume = Length x Width x Height. Subtract the amount your part displaced (see above) and that's how much rubber you'll need. It's easier for me to do it in metric then convert results because square meters translate directly to square liters, so sq. centimeter = sq. centiliter and so on. I couldn't tell you what volume a square inch translates to.

Edited November 18, 2013 by Lunajammer

[Matt T.]

Right on. Thanks Mike!