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Vinyl Acrylic Roof Paints

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EddieH...@msn.com.au

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Apr 11, 1999, 3:00:00 AM4/11/99
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I've had quote to paint the cement tiles on my roof with an acrylic paint
that has had some vinyl added to it.

I've had advice that the addition of vinyl causes the pigments to fade
sooner and the finish will not last as long.

Does anyone know how much vinyl has to be added before these problems start
to occur?

Any other information would be of a great assistance

Thanks

Marvin

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Apr 14, 1999, 3:00:00 AM4/14/99
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I'm not really a roofing expert but in house paints, acrylic has much better
adhesion and durability than vinyl. As for how much vinyl it takes to degrade
the product, who cares? Why would you want to add any vinyl at all?

John Schultz

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Apr 15, 1999, 3:00:00 AM4/15/99
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Roof paints are typically less expensive paints than their counter parts for
wall surfaces.
Ya see, roofs suck paint up to the tune of about 100 square feet per gallon.
Marketing says people don't want to spend 20-25 bucks per gallon for their
roof which would probably take about 20-30 gallons of paint.
The vinyl is added to make the paint cost less. there is also the benefit(?)
of chalking which is supposed to help the paint look cleaner in the long run
as it sheds dirt during rain storms.

John S


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Marvin

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Apr 21, 1999, 3:00:00 AM4/21/99
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John,

Good point!

Just a thought but, since cement tile should not be hard to adhere to, why
not use 100% vinyl and then top coat with acrylic for durability.

Marvin

John Schultz

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Apr 23, 1999, 3:00:00 AM4/23/99
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Because two coats cost more than one everytime. Like you said, Why use the
vinyl at all? We have plenty of customers who prefer to use top quality
acrylics on their roofs. However, I suppose they have the means to afford
it. Yes, the "wall & trim paints" are better and last longer than the roof
paints but not everyone can afford it. Roofer painters want to do the job in
one go - you should see their faces when we tell them that two coats are
necessary for the satin finish roof paints to look right. Aghast!
Remember, it is marketing people who determine what the populace is willing
to pay and they direct the chemists on what to make and how to target the
formulations for a particular product line price.
Since no one is touching and walking around on the roof, a bit of chalking
can be built in without harm and it makes the product more competitively
priced.
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