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Model Forum / Radio Controlled / Air Models / September 2004Thinning Epoxy
What is best to thin epoxy? This is for fuel proofing. Thanks David. >What is best to thin epoxy? This is for fuel proofing. Rubbing alcohol works well. Use just a LITTLE, though. It thins out FAST! Dr.1 Driver "There's a Hun in the sun!" Methyl hydrate works well and is also good for cleaning up. Is also recommended by the epoxy makers. Inexpensive and not overly volatile. Gord Schindler MAAC6694 > What is best to thin epoxy? This is for fuel proofing. > > Thanks > David. >Methyl hydrate works well and is also good for cleaning up. Is also >recommended by the epoxy makers. Inexpensive and not overly volatile. It may not be volatile, but: "Toxic by inhalation, ingestion or skin absorption. May be a reproductive hazard. Ingestion may be fatal. Risk of very serious, irreversible damage if swallowed. Exposure may cause eye, kidney, heart and liver damage. Chronic or substantial acute exposure may cause serious eye damage, including blindness. Irritant. Narcotic. UK exposure limits: long-term 200 ppm, short term 250 ppm." "Safety glasses. Effective ventilation. Within the UK this material must be assessed under the COSHH regulations." I reference: http://ptcl.chem.ox.ac.uk/MSDS/ME/methyl_alcohol.html Dr.1 Driver "There's a Hun in the sun!" Those same things are said about almost any chemical you commonly use. -- Paul McIntosh http://www.rc-bearings.com > >Methyl hydrate works well and is also good for cleaning up. Is also > >recommended by the epoxy makers. Inexpensive and not overly volatile. [quoted text clipped - 15 lines] > Dr.1 Driver > "There's a Hun in the sun!" Yes, but all that can also apply to methanol or a number of other organic substances. Reading COSHH assessments would make even water sound scary!! Just hope that the tree-huggers don't latch onto it and have everything banned because it might make some newt somewhere turn blue. Steve > >Methyl hydrate works well and is also good for cleaning up. Is also > >recommended by the epoxy makers. Inexpensive and not overly volatile. [quoted text clipped - 15 lines] > Dr.1 Driver > "There's a Hun in the sun!" > Yes, but all that can also apply to methanol or a number of other > organic substances. Reading COSHH assessments would make even water > sound scary!! Carrying on this theme, checkout http://www.dhmo.org/ ;-)  SignatureJohn P. - who flies on Epsom Downs, UK. http://www.flyrc.org.uk/ I'm sick of spam, so replace 'nojunkthanks' with 'john' if you want me to read any e-mailed reply! That's hilarious! -- Paul McIntosh http://www.rc-bearings.com > > Yes, but all that can also apply to methanol or a number of other > > organic substances. Reading COSHH assessments would make even water [quoted text clipped - 8 lines] > I'm sick of spam, so replace 'nojunkthanks' with 'john' if you want me > to read any e-mailed reply! I'm not sure whether to buy the t-shirt or the vial marked "poison" lol > That's hilarious! >Yes, but all that can also apply to methanol Well, as a matter of fact, it DOES. Methyl hydrate is another name for methyl alcohol, or methanol. :-) Bottom line is be careful with any volatile organic compounds. Dr.1 Driver "There's a Hun in the sun!" Thanks to all for the advice. David. > What is best to thin epoxy? This is for fuel proofing. > > Thanks > David. The manufacturers of epoxy resins tend to use acetone. > Thanks to all for the advice. > [quoted text clipped - 4 lines] >> Thanks >> David. > The manufacturers of epoxy resins tend to use acetone. No they don't, they use methanol. Signatureboo I use acetone if the temp is low as it will evaporate easier from the mix at lower temps. I use IPA when the temps are higher. I have not used methanol. -- Paul McIntosh http://www.rc-bearings.com > > The manufacturers of epoxy resins tend to use acetone. > > No they don't, they use methanol. > > -- > boo Boo Look up the MSDS on epoxy systems on the Vantico website. You will also note that there are at least 2 types of Epoxy resin. I believe that one is Aromatic Amine Based the other is Aliphatic (Poss crap spelling). The MSDS will tell you what is in the resin and the likely thinner / diluent. Do you work for Vantico (Duxford)? Most of the other players in the market just blend Vantico systems and repackage / resale them as their own product at vast mark-ups. Still not heard of people using methanol though as Paul M noted, you do need to cure off the volatile content otherwise it may effect the adhesives properties. Frank >> The manufacturers of epoxy resins tend to use acetone. > > No they don't, they use methanol. >> The manufacturers of epoxy resins tend to use acetone. > > No they don't, they use methanol. I was talking to a retired but once-famous competition model glider maker today, who says to use cellulose thinners. He said it takes about three times as long to set hard. He also said to mix the resin and the thinners first, then add the hardener. SignaturePeter Fairbrother Cellulose thinners? I didn't know you could thin cellulose (wood fibers) ;^) Are you referring to lacquer thinner? I use lacquer thinner when the temperature is above 25C and acetone when below that. Very little is needed and they usually don't much affect cure times. -- Paul McIntosh http://www.rc-bearings.com > >> The manufacturers of epoxy resins tend to use acetone. > > [quoted text clipped - 8 lines] > -- > Peter Fairbrother >> I was talking to a retired but once-famous competition model glider maker >> today, who says to use cellulose thinners. >> >> He said it takes about three times as long to set hard. He also said to >> mix the resin and the thinners first, then add the hardener. > Cellulose thinners? I didn't know you could thin cellulose (wood fibers) > ;^) That's what it says on the tin. It's thinners for cellulose paint, I guess. It dissolves foam polystyrene like anything! And the plastic CDs are made of. I haven't tried it with epoxy yet. > Are you referring to lacquer thinner? I use lacquer thinner when the > temperature is above 25C and acetone when below that. Very little is needed He used half thinners, half resin and half catalyst. Painted on, for filling pinholes. > and they usually don't much affect cure times. Just repeating what I was told. Another trick he mentioned was to leave the article in the garden for a few days to let the UV from the sun harden the epoxy. SignaturePeter Fairbrother He must have been using some fairly bizarre epoxy formula. A much better filler (much lighter and easier to see the holes) is automotive filler/primer. Pinholes show up about three times their actual size and some auto glazing compound can be applied. -- Paul McIntosh http://www.rc-bearings.com > >> I was talking to a retired but once-famous competition model glider maker > >> today, who says to use cellulose thinners. [quoted text clipped - 24 lines] > -- > Peter Fairbrother |
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