Glass spheres vs microballoons

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jbo_c
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Glass spheres vs microballoons

Post by jbo_c »

Is there a difference? Price appears to suggest a distinct difference. Why would you favor one over the other if different? Difference in functionality? Which would be an easier to sand fairing filler?

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Re: Glass spheres vs microballoons

Post by fallguy1000 »

We've had a few go arounds and the only way to compare is with specific products.
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jbo_c
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Re: Glass spheres vs microballoons

Post by jbo_c »

Not to be a smart aleck, but I’m talking about the two products sold here at BBC. That’s pretty specific isn’t it?

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Re: Glass spheres vs microballoons

Post by BrianC »

When used in a fairing mix, I find phenolic microballoons sand more easily than glass spheres.
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Re: Glass spheres vs microballoons

Post by Dan_Smullen »

My opinion, based on zero facts and only limited experience, is that phenolic microballons, the maroon stuff, is a little heavier than the glass spheres. This corresponds with my theme of building from heavier material to light. I've filled larger valleys with the maroon stuff than I have the glass.

I'm going to look in the West Systems book this evening for specific differences of each.

I've used concoctions of both mixed together, and also add cabosil to keep the goo from sagging.

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Re: Glass spheres vs microballoons

Post by Jaysen »

i could be wrong (i'm married so it is the norm), but aren't balls solid and balloons hollow? I think there are also size differences as well.
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Re: Glass spheres vs microballoons

Post by jbo_c »

I think they’re both hollow, but could also be wrong.

I have some microballoons. Today I ordered glass spheres. Will try to do a comparison and report back here. I’m working outside, though, so likely won’t have results until spring.

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Re: Glass spheres vs microballoons

Post by VT_Jeff »

jbo_c wrote: Wed Nov 17, 2021 3:42 pm I’m working outside, though, so likely won’t have results until spring.

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Re: Glass spheres vs microballoons

Post by Fuzz »

VT_Jeff wrote: Wed Nov 17, 2021 6:36 pm
jbo_c wrote: Wed Nov 17, 2021 3:42 pm I’m working outside, though, so likely won’t have results until spring.

Jbo
And I thought MY stuff took a long time to cure!
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Re: Glass spheres vs microballoons

Post by Dan_Smullen »

The Gospel according to Gougeon Bros. says that glass spheres are lower density that microballoons. “They do not hold a feathered edge, but…much less expensive and may be preferable for larger jobs.”

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