Joint Sealants

Joint Fillers

Monneli Cordoflex

Technical Polyethylene Foam Cord for Expansion Joints

CORDOFLEX is specifically formulated in order to provide a superior filling system for expansion and fractioning joints before elastic sealing in various areas such as:
Joints between walls and floors
Prefabricated concrete panels
Masonry and concrete
Window and door frames in both ceramic
Concrete floors and between standing finish and bearing structures
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Technical Information
Product Description

CORDOFLEX is a closed cell polyethylene foam cord with minimal water absorption for sizing static and dynamic joints in the building industry. Available in different sizes that ranges from 6mm to 50mm in diameter and could be applied both vertically and horizontally.


CORDOFLEX serves as an excellent support for elastomeric sealants and as an efficient back up material for joint sealing applications.

  • Easy to install (can be inserted exerting minor pressure into any kind of joint)
  • Superior resistance from deterioration
  • Exceptionally flexible
  • Non-absorbent
  • Act as bond breaker with minimum strain shape for joint sealants
  • Provides firm backing for sealant tooling
  • Withstands adverse weather conditions
  • Economical
Packaging, Coverage / Consumption


CORDOFLEX is available in the following diameter (mm); 10, 15, 20, 25, 30.

Shelf Life & Storage


Keep the product in dry and covered shed. Do not expose CORDOFLEX into direct sunlight and keep away from all sources of heat.

Technical Properties
Colour  Grey 
Appearance Compressible, closed cell, extruded polythylene circular cord
Density at 20°C  25 kg/L 
Longitudinal tensile strength 40N / mm2
Longitudinal elongation 15%
Elasticity 10%
Temperature when in use -40°C - +80°C
Water absorption Nil
Resistance to solvent Good
Dimensional stability Excellent
All values are subject to 5 to 10% tolerance
Application Information
Instructions for use

Surface Preparation

All surfaces where the waterstop is to be applied must be dry, smooth, clean, free from dust, laitance or loose materials. When otherwise necessary, it is highly recommended to use compressed air or a wire brush in order to remove further dirt, oil stains and other inconsistencies.


Cut CORDOFLEX according to the required length and lay it along the joints accordingly. Gently push the cord against the joint with extra caution not to damage the skin of the material.

Make sure that the diameter of CORDOFLEX is approximately 20% to 25% (required depth to width ratio) greater than the width of the joint in order to ensure that the cord is tightly held in position. This procedure enhances further the aesthetic effect of the material when done on a firm base.

The joint should then be sealed with a suitable sealant from COLMEF product range.


CORDOFLEX is a combustible product. Avoid exposure to all sources of ignition or flame.

Additional Information
Health & Safety

There are no health hazards in connection with CORDOFLEX in normal use.


CORDOFLEX is a combustible product. Avoid any exposure to all sources of ignition or flame.

Important note

The information in this Technical Data Sheet is based on Colmef Monneli’s experience. Colmef Monneli does not accept any liability arising from the use of its products as it has no direct or continuous control over where or how its products are applied. All Colmef Monneli’s Data Sheets are updates on regular basis. It is the user’s responsibility to obtain the latest version.

additional materials
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Technical Properties Sheet
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