Versatile, Elastomeric Sealant
for Horizontal Expansion
and Construction Joints
Belzona® 4521 (Magma-Flex Fluid) is an
elastomeric joint sealant designed for the
effective sealing of construction and
expansion joints. This low modulus
material
readily
extends
and
compresses in sympathy with normal
thermal movement of buildings and
structures, ensuring minimal bond-line
stress for maximum service life.
Many mastics and sealants in the
market-place are one component
materials chosen primarily for ease of
use. Their through-cure can be slow and
ultimate properties dependent on the
depth of mastic installed. Two
component systems give rapid and consistent through-cure, but traditional
Polysulphides, the most common of
these are basically gap fillers, with poor
long term flexibility and weathering
properties.
Belzona® 4521 is a novel hybrid polymer
elastomer system which has been
specifically designed as a cost effective,
superior alternative to conventional
mastics and sealants for use on a wide
variety of horizontal joints.
PARKING DECKS/GARAGES
CONSTRUCTION/CONTRACTION JOINTS
BRIDGES/ROADWAYS
INDUSTRIAL UTILITIES
WAREHOUSE/FACTORY FLOORS
MANUFACTURING
Belzona® 4521 offers excellent adhesion
to most substrates including concrete,
stone, steel and the wide range of repair
systems in the Belzona 4000 Series
Magma polymer range.
The Unconventional Alternative.
Belzona Polymerics Ltd. Harrogate, HG1 4AY, England
Belzona Inc. Miami, Florida 33172, USA
Fax: +44 (0) 1423 505967 • Tel: +44 (0) 1423 567641
Fax: (305) 599-1140 • Tel: (305) 594-4994
E-mail: belzona@Belzona.co.uk
E-mail: belzona@Belzona.com
www.belzona.com
BELZONA 4000 SERIES MAGMA POLYMERS
Safety in use
• Solvent free
• No toxic ingredients
• Isocyanate free
• No heat required
Permanency in service
• Low modulus system developed specifically for expansion joints
• Maintains flexibility at low temperatures
• Permanently elastic
• Excellent UV resistance
• Resistant to a broad range of chemicals
Versatility in application
• Excellent adhesion to wide range of substrates including concrete, stone, steel
• Moisture tolerant
• Joint movement accommodation factor +/- 25% for horizontal and shear
movements in accordance with ASTM C-719
• Quick cure ensuring minimal disruption
Other Belzona 4000 Series Products for Repair
and Protection of Your Floors
BELZONA® 4521 (MAGMA-FLEX FLUID) CAN
BE APPLIED ‘WET TO WET’ WITH OTHER
BELZONA® 4000 SERIES MAGMA POLYMERS
WITHOUT THE NEED FOR ADDITIONAL SURFACE PREPARATION OR CONDITIONING.
Belzona® 4111 – For high performance repairs, rebuilding and resurfacing
concrete, stone, etc.
Belzona® 4131 – For resurfacing extensive floor areas
Belzona® 4181 – For high temperature or chemical resistant repairs
Belzona® 4311 – For protection of surfaces from aggressive chemicals
Belzona® 4411 – Anti-slip system
BS EN ISO 9001:2000
Certificate No. Q/09335
Copyright© 2003 by Belzona International Ltd. All rights reserved. No part of this work may be reproduced or used in any form
or by any means - graphic, electronic or mechanical including photocopying, recording, taping, or information storage and
retrieval systems - without written permission of Belzona International Ltd.
Belzona® is a registered trademark.
Printed in U.S.A. Publication No. 4521 (1003)