Hi,
As spaceman pointed out, there are a lot of people who post about why
something won't work without actually having had experience with the
product. I hate to say it, but I am about to be one of those. However,
I will refer to others' experience regarding the idea of adding latex
paint to papercrete.
> 1c. Re: Acrylic paint in papercrete
> Posted by: "manormeta" evoamo@gmail.com manormeta
> Date: Thu Mar 26, 2009 3:45 pm ((PDT))
>
> Not a deck stain but a waterproofing seal layer, poly based, not to mix into the slurry but to use on top after finishing....look for products like Thompson's Water Seal.
Both Eric Patterson and Barry Fuller have tried many admixtures in and
coatings over papercrete. To me, it makes more sense to coat a block
than to add an expensive (relatively) waterproofing agent to a whole
block. I did some tests along that line years ago, but was not
impressed. However, your results may vary.
Eric's 1991 papercrete dome is featured in Gordon Solberg's book. Eric
coated parts of his dome with Thompson's Water Seal. It did not work
very long, probably because it is an petroleum based material. None of
the oil based paints Eric used worked well, he said they all peeled.
Barry used a latex concrete sealer from UGL called Drylok on his Paper
Palace One/Plath Manor. It has been fine for a few years. A quick
search revealed several others like Hydoloc and Seal-crete. It would be
interesting to hear if anyone has any experience with these. I am not
sure, but I think Eric also tried silicone based sealers with some success.
Eric has most recently built a storage shed and coated it with a
flexible stucco called Stone Forte. That looked very good, although its
a little expensive. I plan to use it in a test soon.
I did personally attend a workshop demonstrating a new exterior lime
based papercete stucco put on by American Clay at Mason Greenstar. It
looks like a great coating. I took a Greenstar block home coated on one
side with the exterior lime stucco and on the other with American Clay's
interior clay plaster with me and haven't seen any cracking or crazing.
It has only been three months though in the desert without rain or
extreme temperatures, so that may not indicative of much. American Clay
has done tests on their product. Tim White, their coating specialist
who put on the workshop said that they will not be selling the exterior
stucco until the buyer attends a workshop, as it does take some special
techniques.
Otherwise, I have only had experience with latex paint on one papercrete
project, a sculpture that is also a storage space for neighbors to drop
off their paper. Its been on for a few months without any problems.
I encourage people to try things, even those that have been tried
before. They might work differently in your case.
Thanks,
Vince
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