MMA ADHESIVE
ADINOX® M422 Gray Steel Bonding Adhesive
Two-Part 10:1 Flexibilized Structural Adhesive - 100% Elongation
Available sizes
50 ml
Dual cartridge 10:1
490 ml
Dual cartridge 10:1
5 gal
Pail
About ADINOX M422 Steel Bonding Adhesive
ADINOX® M422 is a steel bonding adhesive — a two-component, flexibilized toughened structural adhesive with a 10:1 mix ratio, formulated for bonding metals, thermosets and thermoplastics in industrial applications requiring flexibility and impact resistance.
Its thixotropic, gray methacrylate adhesive formulation is well suited for visible bond lines on stainless steel and aluminum, filling gaps up to 0.35 in without sagging and developing handling strength within minutes at room temperature. The combination of 100% elongation, lap shear strength and resistance to thermal cycling and vibration delivers reliable structural joints without extensive surface preparation.
Gap Filling - Fast Room Temperature Cure
- Gap filling up to 0.35 in for irregular joint geometries - thixotropic, non-sagging
- Open time 4 - 6 minutes - handling strength in 10 - 15 minutes
- 10:1 mix ratio by volume (9.6:1 by weight) - full cure in 24 hours at 77°F
- Quantifiable resistance to fuels, solvents, lubricants and aqueous media
High Elongation Methacrylate Adhesive - 100%
- Superior flexibility with 100% elongation (ASTM D 638) for assemblies subject to vibration and impact
- Tensile strength 3,050 - 3,450 PSI - impact resistance 21 ft·lb/in (ASTM D 256)
- Strength increases after 30-day environmental cycling (>3,100 PSI)
- Retains >2,900 PSI after 30-day immersion in gasoline, kerosene and hot water
Steel Bonding Adhesive for Visible Bond Line
- Lap shear >3,000 PSI on stainless steel and >2,800 PSI on aluminum - cohesive failure
- Gray cured color blends with stainless steel and aluminum for aesthetic joints
- Ideal for architectural stainless steel railings, designer metal furniture, marine rail systems and structural signage
- The steel bonding adhesive that requires little or no surface preparation
Technical Information
Uncured Product Properties
Appearance - Resin A / Activator B | Light gray / Gray |
Viscosity A (77°F) | 135,000 - 165,000 cP |
Viscosity B (77°F) | 90,000 - 110,000 cP |
Density A / B / Mixed | ~8.2 / ~8.5 / 8.1 lbs/gal |
Thixotropic index | 5 |
Mix ratio (volume / weight) | 10:1 / 9.6:1 |
Flash Point (TCC) | 50°F |
Mixed / cured color | Gray |
Cured Product Properties
Open time / Working time | 4 - 6 min / 10 - 15 min |
Full cure | 24 hours @ 77°F |
Gap filling | Up to 0.35 in |
Hardness Shore D (ASTM D 2240) | 64 - 66 |
Elongation (ASTM D 638) | 100% |
Tensile modulus (ASTM D 638) | 77,000 - 98,000 PSI |
Tensile strength (ASTM D 638) | 3,050 - 3,450 PSI |
Impact resistance (ASTM D 256) | 21 ft·lb/in |
Service temperature | -40 to 250°F |
Lap Shear Strength by Substrate (ASTM D 1002)
Substrate | Strength | Failure Mode |
Stainless steel / stainless steel | >3,000 PSI | Cohesive failure |
Aluminum / aluminum | >2,800 PSI | Cohesive failure |
ABS / ABS | >1,100 PSI | Substrate failure |
FRP / FRP | >1,600 PSI | Fiber tear |
Environmental Aging - SS/SS (ASTM D 1002)
Initial | >3,100 PSI - cohesive failure |
After 30-day cycle | >3,100 PSI - cohesive failure |
Cycle: 8 h at -22°F / 8 h at 185°F / 8 h at 86°F at 100% relative humidity. Lap shear strength increases after environmental testing.
Chemical Resistance - Al/Al, 30-Day Immersion (ASTM D 1002)
Medium | Retained Strength |
Gasoline | >3,100 PSI |
Acetic acid 10% | >3,000 PSI |
Xylene | >3,100 PSI |
Lubricating oil HD-30 | >3,200 PSI |
Kerosene | >2,900 PSI |
Water at 73°F | >3,000 PSI |
Water at 194°F | >2,900 PSI |
How to Use ADINOX M422?
Surface Preparation
- Wear gloves and protective eyewear - work in a well-ventilated area
- Surfaces must be clean, dry and free of grease, oil and contaminants - degrease with ADINOX® DS 400
- Higher bond strengths are achieved on lightly sanded surfaces
Prepare the Adhesive
- Purge the cartridge before installing the 10:1 static mixing nozzle
- Discard the initial mixed material in the nozzle to ensure the proper mix ratio
- Apply between 65°F and 85°F for optimal cure - lower temperatures slow cure, higher temperatures accelerate it
Bond and Cure
- Apply enough adhesive to completely fill the gap - join parts within the 4 - 6 min open time
- Immobilize the parts during the 10 - 15 min working time - do not move until handling strength is reached
- Full cure in 24 h at 77°F - clean uncured adhesive with isopropanol, acetone or MEK; cured adhesive only by mechanical removal
Get the ADINOX M422 steel bonding adhesive through our authorized distributor network, in two dual-cartridge sizes and 5 gal pails.
Join our distributor network and offer your customers low odor, low bloom instant adhesive solutions for cleanroom and precision assembly environments.
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Where to Buy?
If you are using ADINOX M422, you may be interested in
ADINOX® DS 400
Industrial Degreaser
Cleans and degreases substrates before bonding. Recommended surface preparation for M422.
Caulking Guns
10:1 Dispensing Equipment
Manual and pneumatic guns for 10:1 dual cartridges. Required for M422 application.
Mixing Nozzles
Static Mixers 10:1
Ensure a homogeneous 10:1 mix of both components. Essential companion for M422.
Frequently Asked Questions
What is the ADINOX M422 steel bonding adhesive?
ADINOX M422 is a steel bonding adhesive: a two-component, flexibilized toughened structural adhesive with a 10:1 mix ratio, formulated for bonding metals, thermosets and thermoplastics where flexibility and impact resistance are required.
Why is the gray color of M422 an advantage?
As a gray methacrylate adhesive, M422 blends with stainless steel and aluminum for aesthetic, visible bond lines — ideal for architectural railings, designer metal furniture, marine rail systems and structural signage. Unlike amber systems, the gray formulation carries no UV-yellowing limitation.
Is M422 resistant to chemicals and weathering?
Yes. After 30-day immersion (ASTM D 1002, Al/Al), M422 retains over 2,900 PSI against gasoline, xylene, 10% acetic acid, HD-30 oil, kerosene and hot water, and its strength increases after the 30-day environmental cycle.
What is the service temperature range?
This steel bonding adhesive performs from -40 to 250°F when cured, resisting thermal cycling with cohesive failure.
Which substrates does M422 bond?
It bonds stainless steel, aluminum (1000-6000 and anodized), carbon steel, ABS, PMMA, nylon, PBT, PPO, PVC, PET, polycarbonate, fiberglass (FRP), carbon fiber, Kevlar, wood and ceramics. It is not suitable for PE/PP, PTFE, silicone, aluminum 7000, galvanized steel, copper, bronze or brass.
What gap can M422 fill?
M422 fills gaps up to 0.35 in without sagging thanks to its thixotropic formulation — suitable for irregular joint geometries.
How strong is M422 on steel?
This steel bonding adhesive delivers lap shear above 3,000 PSI on stainless steel and above 2,800 PSI on aluminum with cohesive failure, plus tensile strength of 3,050-3,450 PSI (ASTM D 638).
What is the mix ratio of M422?
M422 uses a 10:1 mix ratio by volume (9.6:1 by weight), dispensed through a static mixing nozzle from a dual cartridge, with a 4-6 minute open time and handling strength in 10-15 minutes.
How flexible is M422?
M422 is a high elongation methacrylate adhesive reaching 100% elongation (ASTM D 638) — the highest of the ADINOX Serie M line — absorbing vibration, impact and substrate movement.