polycarbonate sealant on balconies

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Author Message Anonymous   Posted on Tuesday, April 11, 2006 - 10:40 am:    is anyone familiar with using polycarbonate sealant (in particular - Rainbuster 900)? The contractor has submitted for use in securing balcony scuppers to concrete, and that it will not be in contact with traffic coating nor caulking. I'm not familiar w/ the product - any input would be appreciated! Robin Susan McClendon Senior Member Username: susan_mcclendon Post Number: 49 Registered: 01-2005 Posted on Tuesday, April 11, 2006 - 01:46 pm:    It's not polycarbonate, but polycarbamate. But the point is not the material but whether it will do the job required. The manufacturer's web site (www.topindustrial.com) contains a lot of statements but no product data that would substantiate them. ASTM C920 is a basic standard for elastomeric sealants -- not mentioned. What did you specify? Make them prove it's good stuff -- don't let them make you prove it's not. Polycarbamate could be good stuff but without test data, their claims are just claims. If there are compatibility issues (the contact you mentioned?) then compatibility tests should be performed, not guessed at. John Bunzick, CCS, CCCA Senior Member Username: bunzick Post Number: 504 Registered: 03-2002 Posted on Friday, April 14, 2006 - 11:12 am:    I agree with Susan. It's also not clear how you could be certain that the material will not be in contact with the traffic coating or caulking, at least incidentally. This material appears to be basically "caulking," so using it for it's adhesive qualities would have me concerned. George Ouvina New member Username: jouvina Post Number: 1 Registered: 04-2006 Posted on Sunday, April 16, 2006 - 03:45 pm:    Contact the coating manufacturer in respect to what product would he recommend. If there is a warranty involved there would be a conflict in the future. There are 2 products that I use and had no problems in the past. Dow corning 790 or 795. Sonneborn also makes excellent products, you should contact the local representative and he will be more than happy to assist you.