Mold Calculations

Questions about Making Your Own Lures

Mold Calculations

Postby Mchristensen » Fri Dec 26, 2014 7:47 pm

I am having a hard time figuring out how much high strength 3 rubber and catalyst to use. I am going to make 4 molds at the same time. All the molds combine hold 40 fluid oz of water. Am I correct that 40 fluid oz equals 72.187 cubic inches, which means I need 3.34lbs of rtv? How much catalyst should I use?

Thanks in advance.
Matt
Mchristensen
 
Posts: 2
Joined: Fri Dec 26, 2014 7:39 pm

Re: Mold Calculations

Postby aka anglinarcher » Sat Dec 27, 2014 2:17 pm

I got 3.35 pounds. LOL I guess we rounded up different.

If you have an old RTV3 mod you are tossing, you can cut it up in fine pieces and put it in spots in the mod cavity that don't contact the master. The old will bond perfectly to the new and will give you a flawless mold (assuming the cut up mold is clean and does not have any oils or mold release on it).

The ratio is the same as before, 10:1 by weight, so you would use .35 pounds or 5.6 OZ of catalyst. The catalyst comes with the RTV 3.

I hope this helps, but you are right on track.
I think my bucket list has a hole in the bottom!
User avatar
aka anglinarcher
 
Posts: 853
Joined: Mon Jan 10, 2011 3:51 pm
Location: Northern Utah

Re: Mold Calculations

Postby Mchristensen » Sat Dec 27, 2014 9:32 pm

Yes thank you. I poured it tonight.
Mchristensen
 
Posts: 2
Joined: Fri Dec 26, 2014 7:39 pm


Return to Lure Making

Who is online

Users browsing this forum: No registered users and 30 guests