Hey Les ; you got yourself a nickname ! Sorry Linda ; I should have put a comma in between ; I'd presume Les is a very much silicon free fellow from the Swiss of South Seas (New Zealand). Come over for Cup , racing yachts here down south is a real fun (half of the masts break usually). I will check you our silicon applications database ; if you can tell me what application is it . thanks for cheering me up, Linda Paul Klasek ResMed -----Original Message----- From: Linda:) [mailto:[log in to unmask]] Sent: Wednesday, 22 September 1999 12:27 To: [log in to unmask] Subject: Re: [TN] Moisture Proof Encapsulation Hi Paul, What 's your "silicon Les"? a kind of epoxy? bought from "Dow Conning" too? Could it withstand high temp such as 220C? thx, Linda:) ~~~~~~~~~~~~~~~~~~ Paul Klasek wrote: > I'd go with silicon Les ; > when in open outdoor elements ; anything else is struggling to meet it's > resilience . > I've have a various profiles, shapes and application prototypes being truly > life tested > anchored in cliff rock in pounding surf for a couple of years on one of my > locations : > > everything else (epoxy, metals, urethanes, cements, socalledsuperglues, > etc.) > gave up within months in waves, salt, sand, and UV. > Even crabs don't like it ; human's ain't around (need to absail to it) ; > so silicon lives well in most applications ; > (unless misdesigned by Dow) > > Your's is obviously design dependent as well : experiment . > > Paul Klasek > ResMed > > PS > > CLEAR moisture fav is definitely Si. > But you have to have design consideration on application : > For example lip inwards to hold the silicon plug = passive mechanics needed > ; > silicon is a sealant , not adhesive . > I'd distrust adhesives in general anyhow (aging) > > -----Original Message----- > From: Les Hughson [mailto:[log in to unmask]] > Sent: Wednesday, 22 September 1999 10:42 > To: [log in to unmask] > Subject: [TN] Moisture Proof Encapsulation > > I have a small temperature sensor pcb which is to be sealed into an > enclosure, one side of which is in contact with warm water and may leak > slightly, the other side is in air, probably encountering condensation. > > My problem is how to get impartial advice on what is the best type of > encapsulation compound to use. e.g. Silicone Rubber, Epoxy Resin, > Polyurethane Resin etc. Various manufacturers all have their own range of > products and will recommend one from there range but I have not found a > single source which manufactures the various different types of compound > listed above and can tell me which would be best. > > So. Does anyone have any experience of comparing these different types of > materials... > > Silicone Rubber. > Epoxy Resin. > Polyurethane resin. > Others? > > Is there a clear favourite for moisture protection? > > Any advice would be much appreciated. :-) > > Les Hughson, BEng. > Product/Software Engineer > Spa-Quip Ltd > Tel (+649) 415 8622 > Fax (+649) 415 8621 > > ############################################################## > TechNet Mail List provided as a free service by IPC using LISTSERV 1.8c > ############################################################## > To subscribe/unsubscribe, send a message to [log in to unmask] with following > text in > the body: > To subscribe: SUBSCRIBE TECHNET <your full name> > To unsubscribe: SIGNOFF TECHNET > ############################################################## > Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional > information. > If you need assistance - contact Gayatri Sardeshpande at [log in to unmask] or > 847-509-9700 ext.5365 > ############################################################## > > ############################################################## > TechNet Mail List provided as a free service by IPC using LISTSERV 1.8c > ############################################################## > To subscribe/unsubscribe, send a message to [log in to unmask] with following text in > the body: > To subscribe: SUBSCRIBE TECHNET <your full name> > To unsubscribe: SIGNOFF TECHNET > ############################################################## > Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional > information. > If you need assistance - contact Gayatri Sardeshpande at [log in to unmask] or > 847-509-9700 ext.5365 > ############################################################## ############################################################## TechNet Mail List provided as a free service by IPC using LISTSERV 1.8c ############################################################## To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body: To subscribe: SUBSCRIBE TECHNET <your full name> To unsubscribe: SIGNOFF TECHNET ############################################################## Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information. If you need assistance - contact Gayatri Sardeshpande at [log in to unmask] or 847-509-9700 ext.5365 ############################################################## ############################################################## TechNet Mail List provided as a free service by IPC using LISTSERV 1.8c ############################################################## To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body: To subscribe: SUBSCRIBE TECHNET <your full name> To unsubscribe: SIGNOFF TECHNET ############################################################## Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information. If you need assistance - contact Gayatri Sardeshpande at [log in to unmask] or 847-509-9700 ext.5365 ##############################################################