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About IRS 2129-1 Rubber Modified Epoxy Adhesive

IRS 2129-1 Rubber Modified Epoxy Adhesive is a high performance black resin system. It is designed for the bonding of dissimilar materials, and is particularly suited to bonding rubber or bonding rubberised surfaces. The flow of the material has been modified to prevent ‘slump’ and cures to a semi-rigid finish, which is ideal to help prevent stresses in components and the bonding of materials in a dynamic environment. A two part system with a simple 1:2 mix ratio, it is supplied in a convenient side-by-side double syringe cartridge, complete with static mixing nozzles.

Features & Benefits

  • Bonds well to rubberised surfacesIRS2129 (
  • Excellent adhesion to a variety of metals, rubbers, GRP, wood, glass
  • Non-toxic
  • Thixotropic
  • High impact resistance
  • Very good adhesive to plastics like ABS, PVC, PC, PMMA
  • RoHS compliant


Mix ratio by weight 0.6:1
Mix ratio by volume 2:1
Viscosity Thixotropic
Colour Black
Specific gravity 1.01
Pot life 20 minutes @ 20°C
Cure schedule Bondline temperature
32 hours – full cure
16 hours – full cure
8 hours – full cure
Typical properties
Hardness, Shore A 90
Temperature range -50 to +140°C
Thermal conductivity 0.25 W/mK
Tensile strength 18 MPa
Compressive yield strength <10 MPa
Coefficient of linear expansion 80-100 ppm/C
Volume Resistivity 1.3 x 1012ohmm.cm
Electric strength 22 kV/mm
Water absorption (7 days @ 23°C) 0.35%


Lap shear adhesion
Aluminium to Aluminium 17.8 MPa
Copper to Copper 14.7 MPa
Stainless Steel 17.3 MPa
ABS to ABS 3.1 MPa
Nylon 6 to Nylon 6 4.3 MPa
Acrylic to Acrylic 2.6 MPa


Safety Data Sheets
For the latest SDS for this product, please e-mail [email protected]

Other Information

Technical Guide - Adhesive Problem? What's the Cure? Adhesive Problem? What’s the Cure?

A guide to adhesive bonding, considering structural bonding and the criteria involved for successful assembly.


Our Technical Bulletins & Articles page has links to:

All Downloads

Filename Size Download
IRS 2129-1 Product Data Sheet 0.11MB
Double Syringe Cartridge Instructions 0.19MB
How Much Adhesive Will I Need? 0.15MB
Adhesive Problem? Whats the Cure? 0.38MB

Ordering Information

IRS 2129-1 is available in a convenient side-by-side double syringe cartridge.

The IRS2129-1-50KIT contains a 50ml cartridge of epoxy, a Syringe Gun and three static mixing nozzles. It is ideal for product evaluations or small quantity users.

Part number Description
IRS2129-1-50G Rubber Modified Epoxy Adhesive, Double Syringe Cartridge, 50ml
IRS2129-1-200G Rubber Modified Epoxy Adhesive, Double Syringe Cartridge, 200ml
IDM805001 Dispensing Gun
IDM2N10 Static Mixing Nozzle (pkg 10)
IRS2129-1-50KIT Rubber Modified Epoxy Adhesive Kit – contains 50ml cartridge of epoxy, a Syringe Gun and three static mixing nozzles

Storage: Store in the original unopened containers under cool dry conditions between 15° and 25°C.


Let’s start by talking about your application

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  • Last updated: November 2022
  • Version: 2.9

Statements, technical information and recommendations contained herein are based on tests we believe to be reliable but they are not to be construed in any manner as warrantees expressed or implied. The user shall determine the suitability of the product for his intended use and the user assumes all risk and liability whatsoever in connection therewith.