Product like s120 mould sealer?


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I'll be milling some moulds out of epoxy. I would love to try the s120 sealer but it's just too expensive to ship to the states. Does anyone know of something similar I can get here? Also I'm curious what type of epoxy/filler will work nicely for this? I will probably be building up a layer of epoxy over pre milled mdf leaving a few mm thickness for epoxy and milling final shape into that. Already tried bondo and that works, but I think epoxy/filler will work nicer and be tougher, just not sure what to use. Another guy mentioned coating the mould in Teflon tape which i might consider, but I want to see what is available to use that is similar to s120. 
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Hanaldo - 8/1/2018 1:32:32 AM
Nah the Sealer 15 EZ is the second stage product that I mentioned. I know the datasheet makes it sound similar but it isn't. It is the same base family, but it is made for sealing microporosity so will only have 0.5 - 1% solids, which means you would use a gallon of the stuff before you got any sort of seal let alone gloss. They are really only used to enhance the performance and durability of the release agent that goes on top of them. The primers are called primers because they are heavy duty, 10-15% solids. So they have a much much higher build, making it possible to seal heavy porosity and restore gloss. 

If you have local access to Chemlease though, have a look for MPP 713, MPP 2684W or MPP 2180. These are the Chemlease primers. The mother company Chemtrend also owns Zyvax, so Zyvax will have a similar product but I forget what it's called. 

Also have a look for Marbocote HP2002 or Necumer Necuron V7. These are excellent products, but they are European so I'm not sure you will find them locally. Be aware though that you likely aren't going to find these products in small quantities like Easy Composites supply. They have an extremely short shelf life, and the minimum quantity is very likely to be 1 gallon.

Ok, thanks for clearing that up. Yes the description made it sound similar, but I guess the key word is "microscopic" porosity, so it's only filling on a micro level. I will look into those other products. So I'm assuming the s120 would be considered a mold primer, correct?

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