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Old 08-02-2018, 09:06 AM
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Pete VanderLaan Pete VanderLaan is offline
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Recent refrasil sources?

The title speaks for itself.
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Old 08-02-2018, 09:08 AM
Eben Horton Eben Horton is offline
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https://m.ebay.com/sch/i.html?_nkw=R...sPageName=GSTL
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Old 08-02-2018, 09:36 AM
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thanks Eben, I would need smaller quantities for a client. Enough to do a small Stadelman furnace.
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Old 08-02-2018, 12:01 PM
Eben Horton Eben Horton is offline
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Joe phiefer (sp?) had a bunch and was selling it in small quantities a few years ago.
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Old 08-02-2018, 12:44 PM
Eric Trulson Eric Trulson is online now
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He doesn't stock Refrasil, but John Han over at Rubix Composites has a roll of coated fiberglass cloth (it's normally used as welding blanket) in the warehouse that is good up to 1000F. Should be just fine for laying over a furnace top to keep down the silica dust. (Direct quote from John: "If the top of their furnace is getting that hot, they have waaaaay bigger problems than this blanket's temp rating"). Comes in a 60" roll and is sold by the yard.

phone: (781) 935 - 2221
email: sales@rubixcomposites.com

Disclaimer: I work at Rubix as a sales/process engineer a few days a week. I don't get any sales commissions or kickbacks or anything, and have no financial motivation to push their stuff. Any recommendations I make are done in good faith as a glassblower.
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Old 08-02-2018, 05:33 PM
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Hazard Fraud has welding blankets that hold up well in the annealer so I would say safe to use to cover exterior fiber. That is the cheapest source I have found and can be picked up locally.
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Old 08-03-2018, 06:08 AM
Eben Horton Eben Horton is offline
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Why not use pink fiberglass home insulation? I use that as the top layer under a sheet metal skin. It works great
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Old 08-03-2018, 07:55 AM
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If you have a sheet metal skin, it performs the same function as the refrasil and you no longer need it. Refrasil contains the fiber but it has no insulation value.
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Old 05-07-2019, 12:42 PM
Rollin Karg Rollin Karg is offline
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https://www.buyinsulationproductstor...-pipe-lagging/

I've used this for awhile,with good results.
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Old 05-08-2019, 07:54 AM
Victor Chiarizia Victor Chiarizia is offline
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Cool

im a fan of vermiculite/perlite stucco. quite sculptural and pretty. vic
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Old 05-08-2019, 09:04 AM
Travis Frink Travis Frink is offline
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Quote:
Originally Posted by Victor Chiarizia View Post
im a fan of vermiculite/perlite stucco. quite sculptural and pretty. vic
Is that the 1:1:1 vermiculite:ball clay:Portland cement mix?
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Old 05-08-2019, 09:29 AM
Shawn Everette Shawn Everette is offline
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Wale has this
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Old 05-08-2019, 09:59 AM
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Quote:
Originally Posted by Travis Frink View Post
Is that the 1:1:1 vermiculite:ball clay:Portland cement mix?
*****
That was my mix of choice. It works really well. It was an old favorite of Illinois Southern Univ.
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Old 05-08-2019, 07:26 PM
Travis Frink Travis Frink is offline
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Quote:
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*****
That was my mix of choice. It works really well. It was an old favorite of Illinois Southern Univ.
Thank you. Would this be effective as an outer (3rd layer?) insulation layer over say hight temp castable and fiber or two layers of fire and high temp insulating brick for example?

How did you use it? What should be considered in using it? Limitations or possibilities, etc?
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Old 05-09-2019, 07:59 AM
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I used it on a good sized set of furnaces back in the color rod days. As I recall, I put it over a crown made of Mizzou at the time and the very hot face part melted a touch but it was six inches thick so it was fine. We mixed it on a tarp on the blowing floor with hoes. It came up the consistency of a typical castable while applied- two hands could hold a good sized hunk of it. Once in place, it could be pushed around pretty easily and we troweled it to a very smooth outer surface that could be vacuumed.

The only funny time I had with it was once when making gold sands, I had mixed about a quart of the fluid and one of my employees put it on top of the crown, a bad idea. The container cracked and dumped the mix on the castable which in turn drilled right into the furnace. I think I lost an ounce of gold, the crown and my dignity.

Wear a respirator. Vermiculite is not to be trusted. It does contain asbestos
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Old 05-09-2019, 09:19 AM
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I used the vermiculite mix for an annealer roof and door, 3-3.5" thick. It shows some cracks but has been working for 30 years.
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