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Posted on Tuesday, April 11, 2006 - 10:40 am:   Edit PostDelete PostPrint Post

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:   Edit PostDelete PostPrint Post

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:   Edit PostDelete PostPrint Post

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:   Edit PostDelete PostPrint Post

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.

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