prEN ISO 7390

• Abstract:

  This International Standard specifies a method for the determination of the resistance to flow of sealants, by loss of cohesion under their own weight. These sealants are used in joints in vertical surfaces in building construction.

• Status: Not Published
• Publication Date: 21-Nov-2027
• ICS: 91.100.50 - Binders. Sealing materials
• Technical Committee: CEN/SS B02 - Structures
• Drafting Committee: CEN/SS B02 - Structures
• Current Stage: 4060 - Closure of enquiry - Enquiry
• Start Date: 17-Jul-2026
• Completion Date: 17-Jul-2026
• Ref Project: oSIST prEN ISO 7390:2026 - Building and civil engineering sealants - Determination of resistance to flow of sealants (ISO/DIS 7390:2026)

• Revises: EN ISO 7390:2003 - Building construction - Jointing products - Determination of resistance to flow of sealants (ISO 7390:2003)
• Effective Date: 17-Sep-2025

Overview

prEN ISO 7390:2026 - Building and civil engineering sealants - Determination of resistance to flow of sealants (ISO/DIS 7390:2026) - is an international draft standard developed by CEN and ISO (ISO/TC 59/SC 8). This standard defines a test method for assessing the resistance to flow of sealants used in building and civil engineering applications, particularly for vertical joint surfaces. The principal aim is to determine the sealant's cohesion and stability by evaluating its tendency to lose shape or flow under its own weight when applied to vertical or inclined surfaces.

Key Topics

• Test Method for Resistance to Flow: The standard specifies a consistent, reproducible methodology using defined U-profile test specimens and standardized temperature settings.
• Applicability: Suitable for a broad range of construction and civil engineering sealants intended for use in joints on vertical surfaces.
• Test Procedures: Two main testing procedures (A and B) are defined-one measures downward flow on a vertical profile, and the other measures horizontal projection from a vertical plane.
• Equipment: Use of non-porous, smooth U-profiles (e.g., anodized aluminum), PE sheets, convection ovens, and precise measuring devices.
• Reporting Requirements: A comprehensive test report is mandated, covering laboratory details, sealant characteristics, procedure applied, and test outcomes.

Applications

prEN ISO 7390 is essential for stakeholders in the construction and civil engineering sectors, including manufacturers, testing laboratories, and regulatory bodies. Typical applications and benefits include:

• Sealant Quality Control: Enables manufacturers to verify the performance and formulation consistency of sealant products for vertical joints.
• Product Certification: Facilitates conformity assessment and CE marking requirements across the European Union by providing standardized criteria for sealant performance.
• Construction Project Specifications: Allows architects, engineers, and specifiers to reference a harmonized method for ensuring reliable, non-slumping sealant behavior in high-rise buildings, bridges, facades, and other vertical infrastructure.
• Comparative Performance Testing: Provides a unified basis for comparing different sealant formulations or brands, supporting procurement decisions and technical evaluations.

Related Standards

For a comprehensive approach to building and civil engineering sealants, the following standards offer complementary information:

• ISO 6927 - Building and civil engineering sealants - Vocabulary: Defines the key terms and definitions used in ISO 7390 and related standards.
• EN ISO 11600 - Classification and requirements for sealants: Outlines general requirements and classification criteria for sealants in various construction applications.
• ISO 8340 - Building construction - Sealants - Determination of tensile properties: Provides methods for evaluating the tensile performance of sealants, relevant to overall product durability.
• ISO 9047 - Building construction - Sealants - Determination of adhesion/cohesion properties: Focuses on assessing the adhesion and cohesion properties of sealants under cyclic movement, often used alongside ISO 7390 results for full performance assessment.

Practical Value

Utilizing prEN ISO 7390 ensures uniformity, reliability, and safety in the selection and application of sealants for vertical joints in building and civil engineering projects. By specifying a robust standard test for resistance to flow, this standard helps safeguard structural integrity and extend the service life of buildings and civil works. This is especially critical in settings subject to temperature variations and demanding environmental conditions.

Keywords: building sealants, civil engineering sealants, resistance to flow, sealant test method, building standards, vertical joint sealants, CEN standards, ISO 7390, construction materials testing, performance of sealants.

SLOVENSKI STANDARD
01-junij-2026
Tesnilne mase za stavbe in gradbene inženirske objekte - Ugotavljanje odpornosti
proti tečenju tesnilnih mas (ISO/DIS 7390:2026)
Building and civil engineering sealants - Determination of resistance to flow of sealants
(ISO/DIS 7390:2026)
Dichtstoffe im Hoch- und Tiefbau - Bestimmung des Standvermögens von
Dichtungsmassen (ISO/DIS 7390:2026)
Mastics pour le bâtiment et le génie civil - Détermination de la résistance au coulage des
mastics (ISO/DIS 7390:2026)
Ta slovenski standard je istoveten z: prEN ISO 7390
ICS:
91.100.50 Veziva. Tesnilni materiali Binders. Sealing materials
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
International
Standard
ISO/DIS 7390
ISO/TC 59/SC 8
Building and civil engineering
Secretariat: SAC
sealants — Determination of
Voting begins on:
resistance to flow of sealants
2026-04-24
Mastics pour le bâtiment et le génie civil — Détermination de la
Voting terminates on:
résistance au coulage des mastics
2026-07-17
ICS: 91.100.50
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document is circulated as received from the committee secretariat.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
ISO/CEN PARALLEL PROCESSING
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
NATIONAL REGULATIONS.
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION.
Reference number
ISO/DIS 7390:2026(en)
DRAFT
ISO/DIS 7390:2026(en)
International
Standard
ISO/DIS 7390
ISO/TC 59/SC 8
Building and civil engineering
Secretariat: SAC
sealants — Determination of
Voting begins on:
resistance to flow of sealants
Mastics pour le bâtiment et le génie civil — Détermination de la
Voting terminates on:
résistance au coulage des mastics
ICS: 91.100.50
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document is circulated as received from the committee secretariat.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
© ISO 2026
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
STANDARDS MAY ON OCCASION HAVE TO
ISO/CEN PARALLEL PROCESSING
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
BE CONSIDERED IN THE LIGHT OF THEIR
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
or ISO’s member body in the country of the requester.
NATIONAL REGULATIONS.
ISO copyright office
RECIPIENTS OF THIS DRAFT ARE INVITED
CP 401 • Ch. de Blandonnet 8
TO SUBMIT, WITH THEIR COMMENTS,
CH-1214 Vernier, Geneva
NOTIFICATION OF ANY RELEVANT PATENT
Phone: [phone]
RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION.
Email: [e-mail]
Website: www.iso.org
Published in Switzerland Reference number
ISO/DIS 7390:2026(en)
ii
ISO/DIS 7390:2026(en)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
5 Apparatus . 1
6 Test method . 2
6.1 Preparation of test specimens .2
6.2 Procedures .2
6.2.1 General .2
6.2.2 Procedure A .2
6.2.3 Procedure B .3
7 Test report . 4

iii
ISO/DIS 7390:2026(en)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out through
ISO technical committees. Each member body interested in a subject for which a technical committee
has been established has the right to be represented on that committee. International organizations,
governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely
with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are described
in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the different types
of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the
ISO/IEC Directives, Part 2 (see www.iso.org/directives).
ISO draws attent
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