Waterproofing Manufacturers offer technical support and/or product sheets that can answer your questions regarding performance or application of proprietary products.
Laticrete International, Inc. Phone: (800) 243-4788
Mer-Krete Systems/Mer-Ko Materials - A Division of ParexLahabra Phone: (800) 851-6303
Texas Cement Products, Inc. Phone: (800) 669-0115
United States Gypsum Phone: (312) 606-4000
If your question is still unresolved, you have several choices to explore other means of technical support.
Situation May Require an On-Site Inspection to resolve the problem.
Installation May Require Sample Testing
Questions Regarding Handbook Guidelines or American National Standards