Chris, Have you tried this? The only way I could determine if the cure was complete as to try to remove it with IPA. It simply became impossible to remove after 3 or 4 weeks. It would probably save time and money for James to get a copy of IPC-HDBK-830 the Conformal Coating Handbook. Chris Almeras wrote: >If I'm not mistaken, you can heat cure 1A33 for 20 hours @ 90C, or 30 hours @ 75C, but I would try a 2 part urethane. > >-----Original Message----- >From: TechNet [mailto:[log in to unmask]]On Behalf Of David Douthit >Sent: Tuesday, October 26, 2004 6:02 PM >To: [log in to unmask] >Subject: Re: [TN] conformal coating > > >James, > >If I'm not mistaken 1A33 is a 1 part urethane coating that requires >extended curing times (>500 hrs) at room temperature. This coating is a >two stage "cure". The stage is the evaporation of the solvents which >leaves a "touchable surface that feels dry. The second stage is the >"cross-linkage" that takes place when oxygen molecules permeate the >coating. Any attempts to "clean" surfaces coated with 1A33 before >this "cross-link" curing is complete will result in damage. The major >selling point for 1A33 is that it is easily removed and replaced for >repair work for two or three weeks after it is applied. > >Because the "cross-link" portion of the cure requires oxygen, heat does >not accelerate the curing process. > >Just have them wait 30 days befor cleaning or use a 2 part urethane. > >David A. Douthit >Manager >LoCan LLC > >James TerVeen wrote: > > > >>I am looking for a conformal coating that can withstand the use of a >>cleaner (Lixton TS-974) >>We have a customer who uses our parts that are coated with Humiseal 1A33 >>and is cleaning them in an ultrasonic cleaner that has Lixton TS-974 in it. >>They are complaining that the coating is coming off. With the ingredients >>I see below there is no wonder. So my first question was, is there a >>conformal coating that will withstand this material or if not is there a >>better cleaner I could recommend that will not remove the humiseal. >>Remember it has to go into an ultrasonic cleaner. >> >>Thank in advance. >> >> >>The ingredients are in this material are: >>LIXTON >> >>50 - 10% 4-Hydroxy-4-methyl-pentan-2-0n >>2.5 - 10% N-methyl-2-pyrrolidome >>2.5% Alkylaminethoxylat >>2.5% modifiziertes Fettalkoholetethoxylat >> >> >> >> >>STATEMENT OF CONFIDENTIALITY: >> >>If you have received this e-mail in error, please immediately notify the >>sender by e-mail at the address shown. This e-mail and any attachments may >>contain confidential information. This information is intended only for the >>use of the individual(s) or entity to whom it is intended even if addressed >>incorrectly. Please delete it from your files if you are not the intended >>recipient. 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