Crestabond M1-02: A High-Performance Primerless MMA Adhesive for Structural Bonding
Crestabond M1-02, created by Scott Bader, is a durable, two-part 10:1 acrylic adhesive formulated for adhering composites, thermoplastics, and metals. This structural methacrylate adhesive (MMA) is designed to fulfill the requirements of contemporary assembly tasks, providing remarkable resistance to impact, peel, shear, compressive strength, and fatigue. Crestabond M1-02 streamlines the bonding process with its primerless application, making it a flexible option for various industrial uses.
In this article, we will examine the essential features, advantages, technical details, and suitable uses of Crestabond M1-02, as well as provide tips on surface preparation and application methods.
Key Features and Benefits
- Primerless Application: Removes the necessity for extra primers, cutting down material expenses and processing duration.
- Excellent Adhesion to Dissimilar Substrates: Attaches efficiently to composites, thermoplastics, and metals, providing design versatility.
- Fast Setting and Curing: Offering a working time of 1–2 minutes and fixture time of 2–3 minutes, it speeds up assembly tasks.
- Non-Sag Properties: Ideal for use on vertical surfaces without affecting bond integrity.
- High Strength and Toughness: Provides exceptional mechanical performance for structural uses.
- Excellent Environmental Resistance: Functions consistently in extreme environments, with a temperature range of -40°C to 100°C (-40°F to 212°F).
- Gap Filling Capability: Supports bondline gaps ranging from 1 mm to 15 mm (0.04–0.6 inches), guaranteeing strong joints.
These attributes make Crestabond M1-02 a go-to adhesive for industries requiring durable, high-performance bonding solutions.
Technical Specifications
Application Properties
| Property | Value |
|---|---|
| Working Time¹ | 1–2 minutes |
| Fixture Time² | 2–3 minutes |
| Gap Filling | 1–15 mm (0.04–0.6 inch) |
| Mixed Color | Grey |
| Recommended Application Temp | 18–25°C (64–77°F) |
¹ Measured with 10g mass of adhesive at 24°C (75°F).
² Defined using ISO 4587 lap shear sample, 0.26 mm bondline thickness at 23°C (73°F), achieving >1.4 MPa.
Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength³ | 12–16 MPa (1.7–2.3 ksi) |
| Tensile Modulus³ | 600–1000 MPa (870–1450 ksi) |
| Tensile Elongation³ | 80–100% |
| Aluminium Lap Shear⁴ | 17–21 MPa (2.4–3.0 ksi) |
| Recommended Operating Temp⁵ | -40°C to 100°C (-40°F to 212°F) |
³ Tested to ASTM D638.
⁴ Tested to ISO 4587.
⁵ Maximum temperature where an ISO 4587 lap shear sample achieves >3 MPa.
Liquid Properties
| Property | Adhesive | Activator |
|---|---|---|
| Viscosity⁶ | 300–800 dPa.s / 700–2000 dPa.s | 100–300 dPa.s / 300–1000 dPa.s |
| Specific Gravity | 0.96–1.02 g/cc | 1.05–1.15 g/cc |
| Mix Ratio (by Volume) | 10 | 1 |
| Mix Ratio (by Weight) | 9 | 1 |
| Color | Off-white | Black |
| Shelf Life⁷ | 12 months | 12 months |
⁶ Measured using HAKKE RV1 Rheometer at 25°C (77°F). *Yield point, **Flow.
⁷ Defined from date of manufacture when stored as recommended.
Recommended Substrates
Crestabond M1-02 excels in bonding a variety of substrates, with lap shear strengths varying by material. Below are the recommended substrates and their performance metrics:
Plastics
| Material | Lap Shear Strength⁴ |
|---|---|
| Acrylic | 20–24 MPa (Cohesive failure) |
| PVC | 16–20 MPa (Substrate failure) |
| ABS | 13–17 MPa (Substrate failure) |
| Urethanes & Engineering Thermoplastics | Varies |
Note: For low surface energy plastics (e.g., PP, PE, PTFE), use Crestabond PP-04 instead.
Metals
| Material | Lap Shear Strength⁴ |
|---|---|
| Stainless Steel | 13–17 MPa (Adhesive failure) |
| Cold Rolled Steel (CRS) | 13–17 MPa (Cohesive failure) |
| Aluminium | 17–21 MPa (Cohesive failure) |
| Powder-Coated Metals, Carbon Steel, Zinc/Galvanized, Copper | Varies |
Composites
| Material | Lap Shear Strength⁴ |
|---|---|
| GRP/FRP | 12–16 MPa (Substrate failure) |
| Carbon Fibre, Polyester, DCPD-Modified Vinyl Esters | Varies |
| Epoxy | Test bond strength prior to application |
| Gelcoats | Surface preparation required |
Non-Recommended Substrates: Contact Scott Bader technical services for advice on other materials.
Surface Preparation
General Guidelines
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Make sure that surfaces are clear of oil, grease, dirt, or any release agents.
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Utilize a degreasing substance (e.g., acetone or isopropanol) and let it evaporate completely.
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For improved durability, think about mechanical abrasion or chemical etching along with an additional degreasing step.
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Refrain from utilizing petrol, inferior alcohol, or paint solvents.
Specific Substrates
- Metals:
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Wipe surfaces clean and dry using an alcohol/solvent cloth.
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For materials such as carbon steel, it may be essential to perform mechanical abrasion and then wipe with a solvent.
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- Thermoplastics:
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Clean using an appropriate solvent (e.g., iso-propanol) to eliminate dust and impurities.
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Make sure surfaces are clean and dry prior to bonding.
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- Composites:
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Utilize peel-ply or solvent cleaning to ensure a surface that is dry and free of dust.
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For laminates older than 3 days, use a lint-free cloth and solvent for cleaning.
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Use mechanical means to grind gelcoat or molded surfaces for the removal of release agents.
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Evaluate the adhesive strength of epoxy laminates before use.
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Application Instructions
- Surface Preparation:
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Thoroughly clean substrates according to the aforementioned guidelines.
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Make sure surfaces are clean and devoid of impurities.
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- Dispensing:
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Utilize properly maintained bulk dispensing tools.
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Apply the adhesive gradually onto a non-bonding surface until the mixed bead achieves a consistent color (grey).
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Ensure the quality of the cure prior to moving forward.
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- Bonding:
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Use enough adhesive to occupy the bond gap (1–15 mm).
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Join parts with sufficient pressure to prevent dry bonds.
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Secure components to avoid shifting while curing.
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Achieve full bonding within the 1–2 minute time frame.
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- Temperature Considerations:
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Store adhesive, activator, and substrates between 18–25°C (64–77°F).
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Ambient temperature, bondline thickness, and substrate type can influence fixture time (usually 2–3 minutes).
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- Post-Application:
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Do not relocate the assembly until the designated fixture time arrives.
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Make sure the adhesive has completely cured before placing any stress on the bond.
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Note: Crestabond M1-02 is for industrial/commercial use only and not suitable for household applications. Users should verify adhesive suitability for specific substrates.
Storage and Shelf Life
- Shelf Life:
12 months from the production date if kept between 2°C and 23°C (36°F and 73°F).
- Storage Conditions:
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Keep in original containers, shielded from direct sunlight.
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Steer clear of temperatures exceeding 30°C (95°F), since this lowers reactivity.
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Do not freeze the product.
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- Packaging:
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Offered in 18 kg (40 lb) plastic pails, 180 kg (397 lb) drums, 400 ml co-axial cartridges, and 50 ml side-by-side cartridges.
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Health and Safety
Why Choose Crestabond M1-02?
Disclaimer: All information is based on laboratory testing and is not intended for design purposes. We and Scott Bader makes no warranties regarding this data. Users are responsible for verifying the suitability of the adhesive for their specific applications. For more Information About Lubricants Visit Our Articles
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