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Hey tech!
Looking at the paint additive site,
Nowhere do they tell you what actually you get by using their stuff
in terms, in the common term, of R-value.
They spend a few thousand words trying to convince the hapless reader
why one should not be too interested in that.
Just mix it in and things will be better.
Obviously use this additive where you will never paint again. Ceramic balls will be hard to prep for another coat. Just guessing.
Miniscule spheres are used in making up fairing compounds mixed with epoxy. Any R-value here? Glass spheres and phenolic easier-to-sand spheres make fillets and fairing lighter but have unknown insulation value.
On this 'Hy-Tech' site, I would like to see (photo documented) a latex enamel used to demo this additive. Other coating sites do this.
Like to read what recommended quantities are added, how it is painted on, roller, brush. And kind of surface to expect. What kind of paints are better than others. As in polyurethane. And whether this additive would be useful applied to the exterior or the boat.
And at least a funky test (Maybe they could huddle with Practical Sailor on this) showing with a meter to a camera lens how effective the paint job really is, inside OR outside.
How many coats of the mix per degree of cool to expect - with the ambient temp at such and such.
"Tests show that a 10 coat minimum - approximately 10 mils - will give an R-10 equivalent with the exterior composite deck temperature between 100 and 110 degrees." Hy-Tech words like that.
Otherwise it's like those snake-oil additives you add to your gasoline that guarantee to make your engine get better milage and run cooler. Slick, bro!
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The most ANY insulation (as in foam) will give is a 5 degree drop PER INCH. As I understand it. Correct me.
In the case of a paint additive we have to see the stuff with thermal resistance (R-value) vs thermal conductivity (U-value). As I see it, it's unlikely that a paint can do what foam can do.
The primary insulator in any insulation is trapped AIR. The less of that the less R. The more paint or solid the more U. imco
R-10 with 100 degrees on the deck (so paint the deck a light color!) would give us 90 degrees inside, right?
No way can a paint additive give any SIGNIFICANT drop in temp.
On the opposite side of the coin, I wonder what they use in the space shuttle?....... it's cold out there!........
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What we want is a paint that we roll on a surface. Then we mist an activator /catalyst over it - like water. The paint swells up say 1/4". More coats on each layer of paint/foam, builds up more thickness, gets more R-value. Simple.
Last edited by ebb; 12-15-2007 at 11:06 AM.
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