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Author Message David Axt, AIA, CCS, CSI Senior Member Username: david_axt Post Number: 1249 Registered: 03-2002 Posted on Monday, September 26, 2011 - 07:50 pm:    I have a situation where a manufacturer wants to provide the masonry cleaner, water repellant and anti-grafitti coating. But I also have manufacturers that do not provide all 3 products or provide 2 out of 3 products. How do I write a spec so that I am fair to all the manufacturers? Lynn Javoroski FCSI CCS LEEDŽ AP SCIP Affiliate Senior Member Username: lynn_javoroski Post Number: 1313 Registered: 07-2002 Posted on Tuesday, September 27, 2011 - 11:53 am:    List each product separately with the various manufacturers, but state that the products be compatible where appropriate. (coatings applied after cleaning, for example). David Axt, AIA, CCS, CSI Senior Member Username: david_axt Post Number: 1250 Registered: 03-2002 Posted on Thursday, September 29, 2011 - 02:46 pm:    I solved the problem by only listing manufacturers that make all 3 products (cleaners, water repellents and anti-graffiti coating). It was just going to be too complicated and too much liability for mixing and matching of systems from different manufacturers.