anselmo Posted September 21, 2009 Report Share Posted September 21, 2009 Hi guys I tried making my first 2 part RTV mold using an SP master over the weekend. 1st layer went as well as can be expected (please note megabass vios material shrinks and absorbs the colour from RTV catalyst!) However after pouring the seocnd layer over the top and alowing to dry, I was unable to separate the layers I had tried using WD40 as a release agent but this doesn't seem to work Would vaseline work ok? or should I bite the bullet and order some release agent? TIA Nick Quote Link to comment Share on other sites More sharing options...
Smallie Posted September 21, 2009 Report Share Posted September 21, 2009 You can use vaseline but if you are going to the expense of using RTV, I would by some mold release. You can spray this over the first mold half and the master so you know everything will release right up to the cavity. I found two cans on Ebay at a great price several years ago and I am still using the first can. Quote Link to comment Share on other sites More sharing options...
anselmo Posted September 21, 2009 Author Report Share Posted September 21, 2009 You can use vaseline but if you are going to the expense of using RTV, I would by some mold release. You can spray this over the first mold half and the master so you know everything will release right up to the cavity. I found two cans on Ebay at a great price several years ago and I am still using the first can. Thanks Smallie I also found some on eBay but unfortunately they either didn't post to Ireland, or the cost was prohibitive. Theres a company in the UK where I might be able to get some. I'll do an experiment with vaseline, but if that doesn't work, I'll but some release spray Nick Quote Link to comment Share on other sites More sharing options...
Husky Posted September 21, 2009 Report Share Posted September 21, 2009 Hi guysI tried making my first 2 part RTV mold using an SP master over the weekend. 1st layer went as well as can be expected (please note megabass vios material shrinks and absorbs the colour from RTV catalyst!) However after pouring the seocnd layer over the top and alowing to dry, I was unable to separate the layers I had tried using WD40 as a release agent but this doesn't seem to work Would vaseline work ok? or should I bite the bullet and order some release agent? TIA Nick Nick, Sometimes you have to "massage" the two halves apart IOW, they have to be diligently "peeled" as they tend to appear fused but can be separated. Quote Link to comment Share on other sites More sharing options...
dramone Posted September 21, 2009 Report Share Posted September 21, 2009 a thin vaseline coat works fine as release agent! Quote Link to comment Share on other sites More sharing options...
tauruck Posted September 27, 2009 Report Share Posted September 27, 2009 Vaseline or PVA release agent (used for Fibreglass and washes off with water.) Quote Link to comment Share on other sites More sharing options...
