Composite Materials Turboguy, question..

Mister2.2 · 11-12-2005, 01:03 AM

Know of any good liquid foam? I need something to pour into molds, something that I can dispose of after I form over it (like digging it out of the mold) So obviously it has to be affordable.

I guess any cheap substance would be good, as long as I can rip it out. I know I saw some new rubber type stuff that you can basically force out of a mold and it will hold its shape... Any suggestions?

turboguy · 11-12-2005, 10:38 AM

The only problem is an expandable closed cell liquid urethane foam isn't very cheap. You can get it here for just under $60 for a 2 cubic foot kit.

I checked EBAY and found this.
Its an 8 cubic foot kit for only $72. I like this guys pricing.

Tyler · 11-12-2005, 04:42 PM

yeah and dont cheap out if your going to glass over it because the resin eats the cheap foams

Mister2.2 · 11-13-2005, 09:57 PM

Yeah that's just not affordable to dispose of every time. Ill probably go with some form holding rubber that I can yank out.

turboguy · 11-13-2005, 10:08 PM

What exactly are you trying to do? If I had an idea, I might be able to help a little more.

yoshimitsuspeed · 12-23-2005, 07:20 PM

Quote:

Originally Posted by Tyler

yeah and dont cheap out if your going to glass over it because the resin eats the cheap foams

It's not about the price of the foam, it's about the chemical makeup of the foam and the resin. Styrene based foams (styrofoam, polystyrene, ect) will get eaten by polyester, and other STYRENE based resins.
I have only seen one kind of mix and pour foam (same as above) and it's expensive in small quantites.
I have seen better deals on ebay, and another option is to try to find a local boat builder, or hot tub builder or someone who orders it in larger quantities and get it form them.

PHOENIX · 12-28-2005, 09:45 AM

i use the aerosol spray foam you find at your local home depot or lowes. The fiberglass resin will eat it so i use household foil or syran wrap over the mold. It works for me, im not a professional though but i find it easy to use. It doesnt settle flat so you have to sand it down flat, its good for curves and stuff like that.

11-12-2005, 01:03 AM	#1 (permalink)
Mister2.2 Cheese it! Join Date: Feb 2005 Posts: 6,561 Thanks: 121 Thanked 115 Times in 99 Posts Blog Entries: 1 My Google Map iTrader Rating: (3/100% )	Turboguy, question.. Know of any good liquid foam? I need something to pour into molds, something that I can dispose of after I form over it (like digging it out of the mold) So obviously it has to be affordable. I guess any cheap substance would be good, as long as I can rip it out. I know I saw some new rubber type stuff that you can basically force out of a mold and it will hold its shape... Any suggestions?

11-12-2005, 10:38 AM	#2 (permalink)
turboguy Resident Composites Guy Join Date: Oct 2005 Location: Appleton, WI Posts: 948 Thanks: 1 Thanked 5 Times in 5 Posts iTrader Rating: (2/100% )	The only problem is an expandable closed cell liquid urethane foam isn't very cheap. You can get it here for just under $60 for a 2 cubic foot kit. I checked EBAY and found this. Its an 8 cubic foot kit for only $72. I like this guys pricing. Last edited by turboguy; 11-12-2005 at 12:02 PM..

12-28-2005, 09:45 AM	#7 (permalink)
PHOENIX Beams Owners Group Join Date: Mar 2005 Location: On Hiatus....... Posts: 9,266 Thanks: 92 Thanked 292 Times in 224 Posts Blog Entries: 1 My Google Map iTrader Rating: (49/100% )	i use the aerosol spray foam you find at your local home depot or lowes. The fiberglass resin will eat it so i use household foil or syran wrap over the mold. It works for me, im not a professional though but i find it easy to use. It doesnt settle flat so you have to sand it down flat, its good for curves and stuff like that. __________________ - Dave I'm moving so I need to downsize my collection/hoarding of MR2 Parts. Check out the for sale section to see what I have available!

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11-12-2005, 04:42 PM	#3 (permalink)
Tyler Cage Fighter Join Date: Oct 2005 Location: saskatoon sask Posts: 978 Thanks: 0 Thanked 4 Times in 2 Posts iTrader Rating: (5/100% )	yeah and dont cheap out if your going to glass over it because the resin eats the cheap foams

11-13-2005, 09:57 PM	#4 (permalink)
Mister2.2 Cheese it! Join Date: Feb 2005 Posts: 6,561 Thanks: 121 Thanked 115 Times in 99 Posts Blog Entries: 1 My Google Map iTrader Rating: (3/100% )	Yeah that's just not affordable to dispose of every time. Ill probably go with some form holding rubber that I can yank out.

11-13-2005, 10:08 PM	#5 (permalink)
turboguy Resident Composites Guy Join Date: Oct 2005 Location: Appleton, WI Posts: 948 Thanks: 1 Thanked 5 Times in 5 Posts iTrader Rating: (2/100% )	What exactly are you trying to do? If I had an idea, I might be able to help a little more.