The document provides an evaluation report from ICC-ES regarding the CEMflex® VB waterstop manufactured by BPA-GmbH. The 3-sentence summary is: The evaluation report assesses the CEMflex® VB waterstop for compliance with the IBC codes in preventing water penetration at concrete joints, finding it provides a watertight seal up to certain hydrostatic pressures when properly installed. The metal-based waterstop has a cement coating that forms crystals to fill cracks when wet, and it must be embedded in concrete with specified coverage and overlap at joints according to the report holder's instructions. Special inspections are required to ensure proper installation and coating integrity of the waterstop prior to concrete placement.

1. ICC-ES Evaluation Reports are not to be construed as representing aesthetics or any other attributes not specifically addressed, nor are they to be construed
as an endorsement of the subject of the report or a recommendation for its use. There is no warranty by ICC Evaluation Service, LLC, express or implied, as
to any finding or other matter in this report, or as to any product covered by the report.
Copyright © 2022 ICC Evaluation Service, LLC. All rights reserved. Page 1 of 4
www.icc-es.org | (800) 423-6587 | (562) 699-0543 A Subsidiary of the International Code Council®
ICC-ES Evaluation Report Reissued November 2022
ESR-4383 This report is subject to renewal November 2024.
DIVISION: 03 00 00—CONCRETE
Section: 03 15 00—Concrete Accessories
REPORT HOLDER:
BPA-GmbH
EVALUATION SUBJECT:
CEMflex®
VB WATERSTOP
1.0 EVALUATION SCOPE
Compliance with the following codes:
2018, 2015, and 2012 International Building Code (IBC)
Properties evaluated:
 Watertightness
 Durability
2.0 USES
The CEMflex®
VB waterstop is used to provide a watertight
seal that can resist the penetration of water due to
hydrostatic pressure between joints in concrete walls, slabs,
foundations, and other non-movement joints in accordance
with Section 1805.3.3 of the IBC. The waterstop is used in
conjunction with waterproofing systems for walls and floors
recognized under Sections 1805.3.1 and 1805.3.2 of the
IBC.
The BPA CEMflex®
VB waterstop is intended for interior
and exterior locations of all construction types.
3.0 DESCRIPTION
3.1 General:
The BPA CEMflex®
VB is a Metal Structurally Integral
Waterstop (MSIW) with a proprietary cement-based coating.
The MSIW consists of a galvanized steel sheet that is
coated with a proprietary cement-based coating. The MSIW
is fully embedded in the concrete structure at joint locations.
See Figure 1. When subjected to water, the proprietary
coating undergoes a chemical reaction causing the
formation of a crystalline structure on the surface of the
MSIW. The crystalline growth fills voids and cracks in the
construction joint to prevent the passage of water. See
Figure 2.
3.2 Material:
3.2.1 Metal Panels: The metal panels are type DC01
+ZE25/25 electrolytically zinc coated galvanized mild steel
in accordance with ISO 10152. The sheets are .027-inch
(0.675 mm) thick, 783
/4 inches (2 m) long, and come in
widths of 315
/16 inches (100 mm), 529
/32 inches (150 mm),
77
/8 inches (200 mm), or 927
/32 inches (250 mm). The metal
sheets have a minimum yield strength of 20.3 ksi (140 MPa)
and a minimum ultimate tensile strength of 39.1 ksi
(270 MPa).
3.2.2 Proprietary Coating: The cement-based coating is
composed of type CEM I-III cement in accordance with DIN
EN 197-1, and is blended with red or black pigment and a
proprietary admixture. The coating is applied to the metal
sheets to provide a minimum 1
/64-inch (0.225 mm) uniform
thickness on each side.
3.2.3 CEMflex®
Omega (Ω) Holder: The CEMflex®
Ω -
holder is a grade S235 9
/64-inch (3.5 mm) diameter round
steel bar in accordance with DIN EN 10025.
3.2.4 CEMflex®
Clip: The CEMflex®
clip is a grade S235
5
/64-inch (2 mm) diameter round steel bar in accordance with
DIN EN 10025/10060.
4.0 DESIGN AND INSTALLATION
4.1 Design:
The CEMflex®
VB waterstop is designed to be installed at
non-movement joints in new concrete construction. The
concrete joints shall be designed to provide a minimum
embedment depth in accordance with Table 1 and 2 inches
(50 mm) of coverage to the waterstop.
The allowable hydrostatic pressures based on installation
conditions are shown in Table 1 of this report.
The type, size, details, and locations of MSIWs not shown
in the construction documents shall be submitted for review
by the code official and by the licensed design professional
prior to installation in accordance with ACI 318.
4.2 Installation:
Installation of the MSIW must comply with the
manufacturer’s published instructions, this report, and the
IBC, as applicable.

2. ESR-4383 | Most Widely Accepted and Trusted Page 2 of 4
The MSIW installer must be trained and approved by the
report holder or by the report holder’s authorized distributor
of the product.
The manufacturer’s published installation instructions
must be available at the jobsite at all times during
installation. In the event of a conflict between this report and
the manufacturer’s instructions, this report governs.
4.2.1 CEMflex®
VB Waterstop: There are two methods of
waterstop installation: installation with the CEMflex®
Ω -
holder and installation with the CEMflex®
clip.
With either installation method, the MSIW can be bent by
hand and formed to accommodate corners and curves
within the concrete structure. Once the MSIWs have been
bent to form curves or corners, they must be inspected to
ensure that the proprietary coating is intact on both sides of
the MSIW. If the coating is compromised, the section of
MSIW shall be discarded.
4.2.1.1 CEMflex®
Clip: When installed using the
CEMflex®
clip (Figure 3), the waterstop is embedded into the
freshly placed concrete at the joint location. The CEMflex®
clips are placed at joints of the waterstop to ensure proper
overlap in accordance with Table 1. Placement must be
done in a timely manner while the concrete is still workable
in order to ensure proper positioning and embedment.
Freshly placed concrete must be thoroughly consolidated
around the product to minimize presence of air voids.
4.2.1.2 CEMflex®
Ω - Holder: When installed using the
CEMflex®
Ω - holder (Figure 4), the waterstop is positioned
within the formwork of the concrete structure at the location
of the joint prior to placement of the concrete. CEMflex®
clips
or CEMflex®
Ω - holders are placed at joints of the waterstop
to ensure proper overlap in accordance with Table 1.
CEMflex®
Ω - holders are placed at intermediate positions to
hold the MSIW in the proper design location to ensure
adequate embedment and coverage. Freshly placed
concrete must be thoroughly consolidated around the
product to minimize presence of air voids. Care must be
taken during concrete placement to ensure that the MSIW
is properly positioned in regard to embedment and coverage
once placement is completed.
4.2.2 Preparation for Successive Concrete Placement:
Prior to placing concrete to form adjoining concrete
structures such as placement of a wall on top of a
foundation, the MSIW must be thoroughly inspected to
ensure that the proprietary coating is fully intact. If the
coating is found to be damaged during inspection, the MSIW
manufacturer or authorized distributor shall be contacted for
repair instructions.
5.0 CONDITIONS OF USE
The CEMflex®
VB Waterstop described in this report
complies with, or is a suitable alternative to what is specified
in, those codes listed in Section 1.0 of this report, subject to
the following conditions:
5.1 The concrete structures with embedments, and the
connections for transferring loads between concrete
elements must be designed in accordance with
ACI 318 and are beyond the scope of this report.
5.2 The product is limited to installation in non-movement
joints in concrete construction.
5.3 The product must be used in conjunction with other
approved waterproofing systems in accordance with
Sections 1805.3.1 and 1805.3.2 of the IBC.
5.4 Special inspections in accordance with
Sections 1705.1.1 and 1705.3 of the IBC and
applicable portions of ACI 318 are required to ensure
proper concrete placement techniques, proper
placement of the embedded MSIWs, and to confirm
that the proprietary coating is intact prior to concrete
placement.
6.0 EVIDENCE SUBMITTED
Data in accordance with European Assessment Document
EAD 32002-02-0605 Coated Metal Waterstop Sheet for
Construction and Controlled Crack Joints in Waterproof
Concrete, Edition November 2016, European Organization
for Technical Approvals (EOTA).
7.0 IDENTIFICATION
7.1 The CEMflex®
VB Waterstop sheets described in this
report are identified by a label on the wooden box
bearing the manufacturer’s name; product description
and/or part number; and the ICC-ES evaluation report
number (ESR-4383).
7.2 The report holder’s contact information is the following:
BPA-GmbH
BEHRINGERSTRASSE 12
D-71083 HERRENBERG-GÜLTSTEIN
GERMANY
+49-7032-89-399-0
www.bpa-waterproofing.com/en/
info@bpa-waterproofing.com
TABLE 1—ALLOWABLE HYDROSTATIC PRESSURES
MINIMUM WIDTH
OF CEMflex® VB
MINIMUM OVERLAP—
INCHES (mm)
MINIMUM EMBEDMENT—
INCHES (mm)
ALLOWABLE
HYDROSTATIC
PRESSURE—psi (bar)
ULTIMATE
HYDROSTATIC
PRESSURE – psi (bar)
529
/32 inches /
(150 mm)
2 inches / (50mm) 13
/16 inches / (30 mm) 11.6 psi / (0.8 bar) 29 psi / (2 bar)
529
/32 inches /
(150 mm)
77
/8 inches / (200mm) 13
/8 inches / (35 mm) 29 psi / (2 bar) 72.5 psi / (5 bar)

3. ESR-4383 | Most Widely Accepted and Trusted Page 3 of 4
FIGURE 1—ILLUSTRATION OF TYPICAL INSTALLATIONS
FIGURE 2—ILLUSTRATION OF CRYSTALLIZATION OF PROPRIETARY COATING
FIGURE 4—CEMflex®
Ω - HOLDER
FIGURE 3—CEMflex®
CLIP

4. ICC-ES Evaluation Reports are not to be construed as representing aesthetics or any other attributes not specifically addressed, nor are they to be construed
as an endorsement of the subject of the report or a recommendation for its use. There is no warranty by ICC Evaluation Service, LLC, express or implied, as
to any finding or other matter in this report, or as to any product covered by the report.
Copyright © 2022 ICC Evaluation Service, LLC. All rights reserved. Page 4 of 4
ICC-ES Evaluation Report ESR-4383 CBC Supplement
Reissued November 2022
This report is subject to renewal November 2024.
www.icc-es.org | (800) 423-6587 | (562) 699-0543 A Subsidiary of the International Code Council®
DIVISION: 03 00 00—CONCRETE
Section: 03 15 00—Concrete Accessories
REPORT HOLDER:
BPA-GmbH
EVALUATION SUBJECT:
CEMflex®
VB WATERSTOP
1.0 REPORT PURPOSE AND SCOPE
Purpose:
The purpose of this evaluation report supplement is to indicate that CEMflex®
VB waterstop, described in ICC-ES evaluation
report ESR-4383, has also been evaluated for compliance with the code noted below.
Applicable code editions:
2019 California Building Code (CBC)
For evaluation of applicable chapters adopted by the California Office of Statewide Health Planning and Development
(OSHPD) aka: California Department of Health Care Access and Information (HCAI) and the Division of State Architect (DSA),
see Sections 2.1.1 and 2.1.2 below.
2.0 CONCLUSIONS
2.1 CBC:
The CEMflex®
VB waterstop, described in Sections 2.0 through 7.0 of the evaluation report ESR-4383, complies with CBC
Chapter 18, provided the design and installation are in accordance with the 2018 International Building Code®
(IBC) provisions
noted in the evaluation report and the additional requirements of CBC Chapters 17 and 18, as applicable.
2.1.1 OSHPD:
The applicable OSHPD Sections of the CBC are beyond the scope of this supplement.
2.1.2 DSA:
The applicable DSA Sections of the CBC are beyond the scope of this supplement.
This supplement expires concurrently with the evaluation report, reissued November 2022.