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Cob: concrete stain/colorsSteve Lewis seaweedsteve at newmexico.comMon Jan 28 19:48:52 CST 2002
Hi all. I'm always interested in coloring concrete and cementious materials. I've been using oxides, as Frances Grill suggested, for years. They work great, although I personally don't care for broadcasting it on the surface. It's a pain to trowel it in well and the coloring is superficial, not 1/2" deep, in my experience. It also can get too dense in places, weakening the cement, then chipping off. I prefer to mix the oxides into the mix or make a cream of cement, coloring and fine sand and trowel that onto the rough surface of the grey concrete. This allows finishing to be done at a later date or on top of an old slab. Clean it well and use admixture if it's old. As far as STAINS go, check out Ferrous Sulfate and others. Here's a quote: "Ferrous sulfate and ferric nitrate will stain stucco towards reddish or golden-brown. The color will vary with the absorption of the wall, leaving a blotchy, or mottled look. Do not expect this type of staining to look like a paint job." Ferrous sulfate is sold as a soil conditioner at any garden supply, wallmart or home depot. Saturate in water and paint or spray on. Repeat as desired. Also, there are the professional acid stains. Here's a good link: http://www.concrete-stains.com/ Steve -------------- next part -------------- <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META http-equiv=Content-Type content="text/html; charset=iso-8859-1"> <META content="MSHTML 5.50.4616.200" name=GENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=#ffffff> <DIV><FONT face="Trebuchet MS">Hi all. I'm always interested in coloring concrete and cementious materials. I've been using oxides, as Frances Grill suggested, for years. They work great, although I personally don't care for broadcasting it on the surface. It's a pain to trowel it in well and the coloring is superficial, not 1/2" deep, in my experience. It also can get too dense in places, weakening the cement, then chipping off. </FONT></DIV> <DIV><FONT face="Trebuchet MS"></FONT> </DIV> <DIV><FONT face="Trebuchet MS">I prefer to mix the oxides into the mix or make a cream of cement, coloring and fine sand and trowel that onto the rough surface of the grey concrete. This allows finishing to be done at a later date or on top of an old slab. Clean it well and use admixture if it's old.</FONT></DIV> <DIV><FONT face="Trebuchet MS"></FONT> </DIV> <DIV><FONT face="Trebuchet MS">As far as STAINS go, check out Ferrous Sulfate and others. Here's a quote:</FONT></DIV> <DIV><FONT face="Trebuchet MS" size=2><EM>"Ferrous sulfate and ferric nitrate will stain stucco towards reddish or golden-brown. The color will vary with the absorption of the wall, leaving a blotchy, or mottled look. Do not expect this type of staining to look like a paint job."</EM></FONT></DIV> <DIV><FONT face="Trebuchet MS" size=2></FONT> </DIV> <DIV><FONT face="Trebuchet MS" size=2><FONT size=3>Ferrous sulfate is sold as a soil conditioner at any garden supply, wallmart or home depot. Saturate in water and paint or spray on.</FONT> <FONT size=3>Repeat as desired. </FONT></FONT></DIV> <DIV><FONT face="Trebuchet MS"></FONT> </DIV> <DIV><FONT face="Trebuchet MS">Also, there are the professional acid stains. Here's a good link:</FONT></DIV> <DIV><FONT face="Trebuchet MS" size=2></FONT> </DIV> <DIV><FONT face="Trebuchet MS"><FONT size=2><A href="http://www.concrete-stains.com/">http://www.concrete-stains.com/</A></FONT></FONT></DIV> <DIV><FONT face="Trebuchet MS"><FONT size=2></FONT></FONT> </DIV> <DIV><FONT face="Trebuchet MS"><FONT size=2>Steve<A href="http://www.cupricnitrate.com/"></A></FONT><A href="http://www.cupricnitrate.com/"></A></FONT></DIV> <DIV><FONT face="Trebuchet MS"><FONT size=2><A href="http://www.cupricnitrate.com/"></A></FONT> </DIV></FONT></BODY></HTML>
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