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  1. Bubba Fett's Avatar
    Member Since
    Jul 2006
    Posts
    1,308
    Jul 22, 2009, 10:51 AM - HELP: Cleaning RTV mold #1

    So, casting some fine parts and some part A resin drips into a small area of the mold... impossible to get out with a cloth.

    So now the question is - is there any way to clean molds without destroying the silicone?

    Thx.

    Jon
  2. Member Since
    Jul 2009
    Posts
    3
    Jul 27, 2009, 10:09 AM - Re: HELP: Cleaning RTV mold #2

    what kind of resin are you talking about - urethane; epoxy; polyester ???
  3. formerly old_jedi_mind_trick Bobby Fett UK's Avatar
    Member Since
    Nov 2007
    Posts
    1,453
    Jul 27, 2009, 2:29 PM - Re: HELP: Cleaning RTV mold #3

    Hot soapy water should do the trick..
  4. boba trooper's Avatar
    Member Since
    Aug 2007
    Posts
    311
    Jul 27, 2009, 3:08 PM - Re: HELP: Cleaning RTV mold #4

    I agree with bobby fett, i used to clean my RtV molds with hot soapy water and then left them to dry for a day or sometimes used a hair dryer if there where some deep bits that needed blowing drying but it done the trick.
  5. bobamaker's Avatar
    Member Since
    Apr 2004
    Posts
    714
    Jul 27, 2009, 3:37 PM - Re: HELP: Cleaning RTV mold #5

    If the mould is RTV silicone and the resin in question either Polyurethane or polyester then Acetone will really do the trick. It will thin down the resin then evaporate without harming your mould.

    DAZ
  6. Member Since
    Jul 2009
    Posts
    3
    Jul 28, 2009, 12:40 PM - Re: HELP: Cleaning RTV mold #6

    Hi all,
    I work in the mold rubber business - we manufacture silicones for mold making.
    I recommend using 90% isopropyl alcohol for cleaning - less toxic than acetone & other solvents.

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