MMA ADHESIVE
ADINOX® M305 1:1 Methacrylate Adhesive
Fast Cure 1:1 Two-Part Structural Adhesive
Available sizes
50 ml
Dual cartridge 1:1
400 ml
Dual cartridge 1:1
5 gal
Pail
About ADINOX M305 1:1 Methacrylate Adhesive
ADINOX® M305 is a 1:1 methacrylate adhesive — a two-component, 100% reactive, toughened structural adhesive from the ADINOX Serie M line. With a convenient 1:1 mix ratio and fast cure, it bonds metals, thermoset and thermoplastic substrates, and composite materials with minimal surface preparation.
As a rapid cure structural adhesive, M305 reaches handling strength in 12 to 15 minutes and full cure in 24 hours at room temperature. Its thixotropic, non-sagging formulation delivers strong resistance to impact, peel, thermal cycling and a broad range of chemicals — ideal for high-volume assembly lines in automotive components, electrical enclosures, trailer boxes and metal furniture, where fixture speed is a priority.
Gap Filling - Minimal Surface Preparation
- Gap filling up to 0.275 in for irregular joints and oversized bond lines
- Thixotropic, non-sagging - will not run on vertical surfaces
- Direct adhesion on most substrates - minimal surface preparation required
- Bonds metals, engineering plastics, composites, wood and ceramics
Toughened Structural Performance
- Tensile strength: 3,191 - 3,771 PSI (ASTM D 638)
- Lap shear >3,191 PSI on stainless steel and aluminum - cohesive failure
- Service temperature: -40 to 250 °F
- Gains strength after 30-day environmental cycling (>3,481 PSI)
- Retains >2,900 PSI after 30-day immersion in gasoline, xylene and hot water
Fast Cure - Convenient 1:1 Mix Ratio
- Open time: 4 - 6 minutes - working time: 12 - 15 minutes
- Full cure in 24 hours at 77 °F - room temperature, no ovens or fixtures
- 1:1 mix ratio by volume and weight - simple dispensing, no metering errors
- Ideal for high-volume assembly lines where fixture speed is a priority
Technical Information
Uncured properties
Appearance - Resin A | White |
Appearance - Activator B | Tan |
Viscosity A (77°F) | 45,000 - 55,000 cP |
Viscosity B (77°F) | 45,000 - 55,000 cP |
Density A / B / Mixed | 8.6 / 8.7 / 8.6 lbs/gal |
Mix ratio (volume / weight) | 1:1 / 1:1 |
Flash Point | 51°F |
Mixed / cured color | Amber |
Cured properties
Open time | 4 - 6 min |
Working time | 12 - 15 min |
Full cure | 24 hours @ 77°F |
Gap filling | Up to 0.275 in |
Hardness Shore D (ASTM D 2240) | 73 - 78 |
Elongation (ASTM D 638) | 22 - 28% |
Tensile modulus (ASTM D 638) | 75,000 - 100,000 PSI |
Tensile strength (ASTM D 638) | 3,191 - 3,771 PSI |
Service temperature | -40 to 250°F |
Lap Shear Strength by Substrate (ASTM D 1002)
Substrate | Strength | Failure Mode |
Stainless steel / stainless steel | >3,191 PSI | Cohesive failure |
Aluminum / aluminum | >3,191 PSI | Cohesive failure |
ABS / ABS | >1,160 PSI | Substrate failure |
FRP / FRP | >1,450 PSI | Fiber tear |
Aluminum / ABS | >2,031 PSI | Substrate failure |
Temperature Resistance - Al/Al (ASTM D 1002)
Temperature | Strength |
-40°F | >5,221 PSI |
25°F | >4,786 PSI |
77°F | >3,191 PSI |
185°F | >2,466 PSI |
250°F | >2,031 PSI |
Environmental Aging - Al/Al (ASTM D 1002)
Initial | >3,191 PSI - cohesive failure |
After 30-day cycle | >3,481 PSI - cohesive failure |
Cycle: 8 h at -22°F / 8 h at 185°F / 8 h at 86°F at 100% relative humidity.
Chemical Resistance - Al/Al, 30-Day Immersion (ASTM D 1002)
Medium | Retained Strength |
Gasoline | >3,191 PSI |
Acetic acid 10% | >3,191 PSI |
Xylene | >3,191 PSI |
Lubricating oil HD-30 | >3,336 PSI |
Kerosene | >3,191 PSI |
Water at 73°F | >3,046 PSI |
Water at 194°F | >2,901 PSI |
Cleavage Peel Strength - SS/SS (ASTM D 3807)
Initial peel strength | >18 pli |
Average peel strength | >17 pli |
How to Use ADINOX M305?
Surface Preparation
- Wear gloves and protective eyewear - work in a well-ventilated area
- Surfaces must be clean, dry and free of dust, grease and oil
- Degrease with ADINOX® DS 400 - clean mechanically or chemically if needed, then dry completely
Prepare the Adhesive
- Purge a small amount of each component without the mixing nozzle
- Attach the 1:1 mixing nozzle securely and insert the cartridge into the application gun
- Purge again with the nozzle installed, then apply a continuous, uniform bead without stopping
Bond and Cure
- Join parts within the 4 - 6 min open time - apply constant, uniform pressure
- After the 12 - 15 min working time (~70% cure), do not move the parts
- Full cure in 24 h at 77°F - remove the nozzle and clean the cartridge outlet horizontally
Get ADINOX M305 through our authorized distributor network. Available in 50 ml, 400 ml dual cartridges, and 5 gal pails.
Join our distributor network and offer your customers fast cure 1:1 structural bonding solutions for high-volume assembly lines.
Become a Partner
Where to Buy?
If you are using ADINOX M305, you may be interested in
ADINOX® DS 400
Industrial Degreaser
Cleans and degreases substrates before bonding. Recommended surface preparation for M305.
Caulking Guns
1:1 Dispensing Equipment
Manual and pneumatic guns for 1:1 dual cartridges. Required for M305 application.
Mixing Nozzles
Static Mixers 1:1
Ensure a homogeneous 1:1 mix of both components. Essential companion for M305.
Frequently Asked Questions
What is ADINOX M305?
ADINOX M305 is a fast cure methacrylate adhesive: a two-component, 100% reactive structural adhesive with a 1:1 mix ratio, formulated to bond metals, plastics and composites with minimal surface preparation.
What is the mix ratio of M305?
M305 uses a convenient 1:1 mix ratio by volume and by weight, dispensed through a static mixing nozzle from a dual cartridge — making it a straightforward 1:1 mix ratio structural adhesive.
How fast does M305 cure?
As a rapid cure structural adhesive, M305 has a 4-6 minute open time and a 12-15 minute working time, reaching handling strength quickly and full cure in 24 hours at 77°F.
Which substrates does M305 bond?
It bonds stainless steel, aluminum (Series 1000-6000), carbon steel, ABS, nylon, PMMA, PET, polycarbonate, fiberglass (FRP), Kevlar, wood and more. It is not suitable for polyolefins (PE/PP), PTFE, silicone, aluminum 7000 series, galvanized steel, or copper/brass/bronze.
What gap can M305 fill?
M305 fills gaps up to 0.275 in (7 mm), making it suitable for irregular joints and oversized bond lines without sagging on vertical surfaces.
What is the service temperature range?
Cured M305 performs from -40 to 250°F (-40 to 121°C), retaining cohesive failure performance through thermal cycling.
Does M305 need surface preparation?
Minimal preparation is required — surfaces only need to be clean, dry and free of grease or oil. For demanding applications, degrease with ADINOX DS 400.
How does M305 compare to other 1:1 fast-cure methacrylate adhesives?
M305 is a fast setting MMA adhesive that matches the convenience of a 1:1 mix ratio with toughened impact and chemical resistance, offering a direct alternative for 1:1 fast-cure structural bonding programs.
Is M305 resistant to chemicals and weathering?
Yes. After 30-day immersion (ASTM D 1002, Al/Al), M305 retains over 2,900 PSI against gasoline, xylene, 10% acetic acid, HD-30 oil, kerosene and hot water, and gains strength after the 30-day environmental cycle.