Bullet Weight Posted January 10, 2004 Report Share Posted January 10, 2004 I have a 1 pound kit of RTV from Lurecraft. The kit consists of a 14oz. bottle of silicone and a 2oz. bottle of activator. THe Lurecraft catalog says to mix the silicone and activator at a 10:1 ratio. THe bottles actually say to mix at a 9:1 ratio. Now I am confused as I haven't worked with this stuff before and it is just sitting here staring at me... Is there anyone that can help? I need some experienced advice to get me started. I have an awesome bait design that I want to mold, but am now at an impass. Thanks a ton for any help that you can give. I have searched the archives here but haven't found anything about this yet. Quote Link to comment Share on other sites More sharing options...
SRPLASTICS Posted January 10, 2004 Report Share Posted January 10, 2004 Mix 10:1 by weight not volumn 10 oz of RTV = 1 oz of catalyst, pour a slow thin bead to reduce air bubbles and only pour at one location of the mold, let the flow cover your original, let cure for min. 12 hours, however, you can place in a oven on "warm" to reduce cure time. Quote Link to comment Share on other sites More sharing options...
Bullet Weight Posted January 10, 2004 Author Report Share Posted January 10, 2004 Thanx, SRPLASTICS. That answers my ratio question, but it opens another one for me. I will still have 4oz. of silicone left after the first 10:1 is mixed. I will also have 1oz. of activator left. how much of that ounce would I use with 4oz. of silicone? Is there some reason that they sell it like this? Wouldn't it be easier if they just sold exact mixtures? I guess I will have to call and complain... Quote Link to comment Share on other sites More sharing options...
Bullet Weight Posted January 10, 2004 Author Report Share Posted January 10, 2004 Nevermind.... I just got my answer. Thanks for the help, though. I appreciate it. Quote Link to comment Share on other sites More sharing options...
gordon gaudlitz Posted January 10, 2004 Report Share Posted January 10, 2004 The silicone from LC is pretty good, I've gone through about 13 lbs of the stuff. I found out early that to much activator was better than to little, plus it hardens the mold quicker, if you don't have the measurements perfect it still works. One other thing when working with the silicone wear some type of latex gloves, I do now but didn't when I first started, nobody told me that I should. I still have dryness and cracking on my finger tips. Quote Link to comment Share on other sites More sharing options...
SRPLASTICS Posted January 10, 2004 Report Share Posted January 10, 2004 I would research buying RTV locally, I buy it for about 100 bucks per gallon, Lurecraft and MF are very expensive to buy that kind of stuff from, I don't know why they sell it in unmatched mixed ratios, thats just the way they bulk package it. Quote Link to comment Share on other sites More sharing options...
midknightassazzin Posted January 11, 2004 Report Share Posted January 11, 2004 Smooth-on now offers a flexible mold compound. I imagine it's like the RTV? The product number is PMC-744. I may order it soon and give it a try. If anyone has done so, let me know how it worked. Quote Link to comment Share on other sites More sharing options...
