Incompatible Products

To avoid damage to the pipe and fittings, ancillary construction products coming into direct contact with FlowGuard®, BlazeMaster®, or Corzan® piping systems must be chemically compatible. Lubrizol recommends that the compatibility of ancillary products be confirmed with that product’s manufacturer prior to use.

The following products have been found to be incompatible with FlowGuard, BlazeMaster, and Corzan piping systems. Please note: a product’s absence from this list does not mean that it is compatible. Products in this list are designated with numerals to clarify the known compatibility hazards associated with them, as follows:

Compatibility Hazard Description
1 These products were reported to have been used at the site of one or more failed piping systems, and upon further investigation were found to contain the same ingredient(s) which were identified as having caused or contributed to the reported failure.
2 These products have been determined to be incompatible based on laboratory testing conducted by Lubrizol.
3 These products have been determined to be incompatible based on compositional information found in the manufacturer’s labeling or published literature. One or more ingredients reported by the manufacturer is the same as or chemically similar to ingredients identified as having caused or contributed to piping system failure with similar products (the products designated with a 1).
4 These products have recommendations in their manufacturer’s published literature not to use them with CPVC. This may not necessarily reflect their compatibility status. They are nevertheless listed here because, as reported by the manufacturer, they should not be used with CPVC.


Do not use the products below with FlowGuard pipe & fittings, BlazeMaster fire sprinkler systems and Corzan industrial systems. If you have any questions about chemical compatibility, contact the product manufacturer for more information.

Antimicrobial Coatings
Company    Product    Compatibility Hazard
Click here for clarification   
Company    Product    Compatibility Hazard
British Gypsum Gyproc Sealant
OSI Sealants
(Dartworth Company)
(Ohio Sealants
Polyseamseal Tub & Tile Adhesive Caulk
Polyseamseal All Purpose Adhesive Caulk
Pro Series PC-158 Caulk
John Wagner Associates Grabber Acoustical Sealant GSCS 1
Pecora AC-20 Acrylic Latex Caulk & Silicone 1
Sika Corporation Sikaflex® Self-Leveling Sealant 1
Specified Technologies Inc. Specseal Smoke’N’Sound Acoustical Sealant 3
United States Gypsum Sheetrock Brand Acoustical Sealant 3
White Lightning 3006 All Purpose Adhesive Caulk 2
Fire Stopping Systems
Company    Product    Compatibility Hazard
3M Fire Barrier 2003 Silicone
3M Fire Barrier Sealant FD 150+ 3
3M Fire Barrier CP25WB+ 1
3M Fire Barrier Tuck-in Wrap Strips 4
Flame Stop Flame Stop V 1
Promat Grafitex 3
Proset Proseal Plug, Black
Proset Proseal Plug, Red 2
Hilti CP506 Smoke and Acoustic Sealant 3
Hilti CP606 Flexible Firestop Sealant 3
No Nonsense Limited No Nonsense Intumescent Acrylic Sealant 3
Leak Detector (See also Other Compatibility Concerns)
Company    Product    Compatibility Hazard
Federal Process Co. Gasoila Leak Tech 1
G. F. Thompson Co., Ltd. Masters Leak Detector 1
Unipak A/S Multitec leak detecting spray 3
Radnor Welding Products Radnor® Leak Test Regulator Temperature 1
RectorSeal® RectorSeek™ Low-Temp 1
Mold Cleaners
Company    Product    Compatibility Hazard
Anabec Systems Anabec Advanced Cleaning Solution 1
Coating Systems Laboratories, Inc. Zoonocide 1
Fiberlock Technologies ShockWave 1
Fiberlock Technologies IAQ Advanced Peroxide Cleaner No. 8314 3
Microban Systems Microban QCG 3
X-M Industries Structure-Guard mold and mildew resistant coating 3
Mold Inhibitors
 Company     Product  Compatibility Hazard
Serum Products, LLC Serum 1000 1
Pipe Clamp
Company    Product    Compatibility Hazard
LSP Specialty Products Acousto Clamp, Acousto-Plumb System Incompatible information is based on testing of products manufactured prior to October 2007. For more information regarding this product please contact the manufacturer. 1
Naylon Products Naylon vinyl-coated wire pipe hangers 3
Pipe Tape
Company    Product    Compatibility Hazard 
Christy's Pipe Wrap Tape 2
Pro Pak, Inc. Pipe wrap tape (black) 3
Pasco All Weather PVC Pipe Wrap 2
Wonder No. 413 Pipe Wrap Tape 2
Thread Sealants
Company    Product    Compatibility Hazard
Allied Rubber & Gasket Company (ARGCO) Super Dope 2
Anti-Seize Technology TFE Paste 1
Devcon Super Lock Hi-Strength, Stud Lock Grade 2271 2
General Sealant GS-600 2
G.F. Thompson Co., Ltd. Masters™ Pro-Dope™ with Teflon® 1
Hercules Brush-on/Blue Block 2
Hernon Mfg. Inc. Powerseal #932 2
JC Whitlam Mfg. Co. Seal Unyte Thread & Gasket Sealer 2
Jet Lube, Inc. Jet Lube V-2 2
Jomar Tighter-than-Tite 2
Loctite Threadlocker 242 2
Loctite 577 1
Lyn-Car Products Ltd Proseal 2
National Starch & Chemical, Permabond Division Permabond LH-050 2
National Starch & Chemical, Permabond Division Permabond LH-054 1
Permatex Company, Inc. Permatex 14H 2
Rule High Performance Teflon Thread Sealing Compound 2
Saf-T-Lok Chemcial Saf-T-Lok TPS Anaerobic Adhesive/Sealant, Industrial Grade TPS 2
SOS Products Teflon Pipe Dope 1
Swagelock Company SWAK 2
Company    Product    Compatibility Hazard
Tremco    TREMproof 250GC single component polyurethane    3

Updated: August 10, 2017
Supersedes: June 26, 2017

 Legal Disclaimer

The FBC™ System Compatible Program is a resource made available to manufacturers of ancillary products intended to be used with CPVC to help determine whether a product is chemically compatible with Lubrizol's FlowGuard®, BlazeMaster®, and Corzan® CPVC piping systems. Other manufacturers and/or brands of CPVC piping have not been tested as part of the FBC™ System Compatible Program. The FBC™ System Compatible program is, therefore, only applicable to the chemical compatibility of ancillary products with the Lubrizol brands of FlowGuard, BlazeMaster, and Corzan CPVC piping systems. This distinction is made because every brand of CPVC piping is made with unique compounds, some of which may contain resins with different molecular weights and varying chlorine content. These characteristics directly impact the performance of the resulting product. Similarly, various CPVC products contain different performance additives. This too affects the performance characteristics of the ancillary product. For these reasons, Lubrizol has no responsibility for any failures occurring as a result of using products in the FBC System Compatible Program with CPVC products other than FlowGuard, BlazeMaster, and Corzan.