From: norm.doty@worldnet.att.net Subject: Re: COZY: Pour Foam Date: Mon, 16 Jun 1997 07:20:07 -0400 the foam in a can at any hardware store is about the same. thats what most builders down here are using because of the high price of the pour and the limited shelf life of the pour in plastic containers norm cozy IV #202 ---------- > From: Steven D. Sharp > To: Cozy Builders Newsgroup > Subject: COZY: Pour Foam > Date: Monday, June 16, 1997 5:10 AM > > Can anyone tell me what "pour foam" really is?? Where can it be > purchased locally as opposed to Wicks, A.$.$., etc. I need some to play > with an idea and hate to come up with an order of $25 minimum just to > get the stuff. I've seen it around - just don't remember where - any > ideas? > > Appreciate the help in advance. > Steve Sharp > cozyiii@earthlink.net by InfoAve.Net (PMDF V5.1-7 #17060) with SMTP id <01IK4S3WJ9RK9EU25C@InfoAve.Net> for cozy_builders@hpwarhw.an.hp.com; Mon, 16 Jun 1997 07:36:21 EST Date: Mon, 16 Jun 1997 07:34:33 -0400 From: Jeff S Russell Subject: Re: COZY: Pour Foam Organization: AEROCAD INC. Steven D. Sharp wrote: > Can anyone tell me what "pour foam" really is?? Where can it be > purchased locally as opposed to Wicks, A.$.$., etc. I need some to play > with an idea and hate to come up with an order of $25 minimum just to > get the stuff. I've seen it around - just don't remember where - any > ideas? It is the liquid that make rigid urethane. This foam can be water or solvent based. It can come in many poundage from 1 to 30 lbs per cubic feet. If you can find a boat manufactory they use a lot of it. We purchase it from GLS. You must purchase it in no less then 10 gals. about $400.00. -- Jeff Russell/AeroCad Inc. From: Marc J. Zeitlin Subject: Re: COZY: Pour Foam (fwd) Date: Mon, 16 Jun 97 13:48:31 EDT Steve Sharp asks: >> Can anyone tell me what "pour foam" really is?? Norm Doty wrote: >the foam in a can at any hardware store is about the same. Jeff Russell wrote: >It is the liquid that make rigid urethane......You must purchase it >in no less then 10 gals. about $400.00. I'll add my $0.02. I bought a 2 gallon kit from Wicks, I think - it's got enough foam in it for about 17 COZY MKIV's :-). I think it was around $13. If people are using the aerosol can version and it's sandable and carvable like the block urethane (that's what the "pour foam" makes - ~2 lb./cu. ft. urethane), then by all means use that. All you use it for is to fill in irregularly shaped areas - there's no structural requirements. Don't mix too much at once - a little goes a long way, and it can get VERY hot. -- Marc J. Zeitlin Email: marcz@an.hp.com Date: Mon, 16 Jun 1997 11:57:38 -0600 (MDT) From: Ron Lee Subject: Re: COZY: Pour Foam (fwd) >I'll add my $0.02. I bought a 2 gallon kit from Wicks, I think - it's >got enough foam in it for about 17 COZY MKIV's :-). I think it was >around $13. If people are using the aerosol can version and it's >sandable and carvable like the block urethane (that's what the "pour >foam" makes - ~2 lb./cu. ft. urethane), then by all means use that. All >you use it for is to fill in irregularly shaped areas - there's no >structural requirements. Don't mix too much at once - a little goes a >long way, and it can get VERY hot. > >-- >Marc J. Zeitlin Email: marcz@an.hp.com > I do not have experience with this but I have heard that the foam may expand later if not cured at some TBD temp. I assume that you should make sure the foam is fully expanded..perhaps by locally elevating the air temp to 100 degrees F....maybe a bit higher. Ron Lee Date: Mon, 16 Jun 1997 13:15:35 -0500 (CDT) From: Bill Jackson Subject: COZY: non-expanding foam. I bought a spray foam product (DOW?) from a local builders supply that I used tofill in some rust holes on one of my beaters. This stuff was blue and did not not expand, as advertized, like the yellow variety. Anyone know if this is urethane? Bill Jackson jackson@sierra.cecer.army.mil From: Marc J. Zeitlin Subject: Re: COZY: Pour Foam (fwd) Date: Mon, 16 Jun 97 14:30:50 EDT Ron Lee writes: >I do not have experience with this but I have heard that the foam may expand >later if not cured at some TBD temp. I assume that you should make sure >the foam is fully expanded..perhaps by locally elevating the air temp to >100 degrees F....maybe a bit higher. Anything's possible, but I'd be very surprised. The foam will get to well over 100 F by itself as it's expanding and curing. Once cured, it looks almost identical to the 2 lb./cu. ft. urethane foam we all love to hate due to its dust :-). I can't imagine how this stuff could continue to expand, expecially since this is a chemical reaction caused by mixing the two parts, not due to air exposure (like the stuff from the can). I would be interested to know if I'm wrong however, as I can imagine getting a few warts here and there on the fuselage and winglets if it's true :-). -- Marc J. Zeitlin Email: marcz@an.hp.com by InfoAve.Net (PMDF V5.1-7 #17060) with SMTP id <01IK5FWID2SS9ES0SF@InfoAve.Net> for cozy_builders@hpwarhw.an.hp.com; Mon, 16 Jun 1997 18:58:19 EST Date: Mon, 16 Jun 1997 18:56:43 -0400 From: Jeff S Russell Subject: Re: COZY: Pour Foam (fwd) Organization: AEROCAD INC. Marc J. Zeitlin wrote: > I can't imagine how this stuff could continue to expand, > expecially since this is a chemical reaction caused by mixing > the two parts, not due to air exposure (like the stuff from the can). > I would be interested to know if I'm wrong however, as I can imagine > getting a few warts here and there on the fuselage and winglets if it's > true :-). I have seen this stuff grow later if it was water base. The can stuff is water base and is not 2 lbs per cu. ft. When you cut the skin off at a later date you will hear a popping noise for a while. This trapped gas can release and some times put small air bubbles in a wet layup during a cure. My rule is to let pour foam have time to off gas after sanding. At least a 24 hour time after a pour and cut or sand. Always warm your part for pour foam because cold will stop the foaming process and the foam can pull away from the cold part giving poor cell structure. This stuff will stick to wax paper as good as sanded fiberglass. So wear gloves unless you are willing to wear pour foam for a long time. I always try to hard shell the sanded foam to completely stop any off gassing under the layup. Remember that it will expand 40 to 1. BTW, GLS will only sell this product at 10 gal. or more. You can purchase it in lesser quantities I am sure somewhere else. -- Jeff Russell/AeroCad Inc. E-mail: Jeff@aerocad.com Phone/ fax (call first): 910-961-2238 AeroCad: http://www.aerocad.com Composite workshop info: http://www.Sportair.com