Allied Custom/Plasterworks, LLC
Phone: (405) 366-9500

Bonsal American
Phone: (704) 525-1621

Custom Building Products
Phone: (800) 272-8786

Laticrete International, Inc.
Phone: (800) 243-4788

MAPEI Corporation
Phone: (800) 42-MAPEI (62734) 

MERKRETE/ParexLahabra
Phone: (800) 851-6303

Maxxon Corporation
Phone: (800) 356-7887

NAC Products, Inc.
Phone: (800) 633-4622

Noble Company
Phone: (800) 878-5788

Proflex
Phone: (877) 577-6353

Texas Cement Products, Inc.
Phone: (713) 682-8411

United States Gypsum Company (USG)
Phone: (312) 606-4000

Wacker Polymers
Phone: (800) 485-3686

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