ITW Plexus MA300 Rapid-Cure Methacrylate Structural Adhesive vs. Scott Bader Crestabond M1-20 Primerless Methacrylate Adhesive
ITW Plexus MA300 Rapid-Cure Methacrylate Structural Adhesive (ITW Performance Polymers) and Scott Bader Crestabond M1-20 Primerless Methacrylate Adhesive (Scott Bader North America) achieve a 96.3% ASTM engineering compatibility score in Marine ISO/NPG Gelcoats, Structural Bonding Pastes & Mold Releases. Tensile strength delta is +1.5 MPa (+7.1%) and thermal HDT delta is 0 °C, making them qualified for direct drop-in substitution under standard cure schedules.
Side-by-Side ASTM Mechanical, Thermal, Rheological & Pricing Delta
| ASTM Parameter | A: ITW Plexus MA300 Rapid-Cure Methacrylate Structural Adhesive (ITW Performance Polymers) | B: Scott Bader Crestabond M1-20 Primerless Methacrylate Adhesive (Scott Bader North America) | Engineering Delta (A vs. B) |
|---|---|---|---|
| OEM Manufacturer & SKU | ITW Performance Polymers • ITW-MA300-CASE | Scott Bader North America • SCB-CREST-M120 | Cross-Brand OEM Equivalent |
| ASTM D638 Tensile Strength (MPa / PSI) | 22.5 MPa (3,263 psi) | 21 MPa (3,046 psi) | +1.5 MPa (+7.1 %) |
| ASTM D648 Heat Deflection Temp (HDT °C / °F) | 82 °C (180 °F) | 82 °C (180 °F) | 0 °C (Direct Thermal Match) |
| ASTM D790 Flexural Strength (MPa) | 40.5 MPa | 39 MPa | +1.5 MPa (+3.8 %) |
| ASTM D2583 Barcol Hardness | 40 | 40 | 0 Barcol |
| ASTM D2196 Brookfield Viscosity @ 25°C | 110000 cPs | 120000 cPs | -10000 cPs (-8.3 %) |
| Gel Time @ 25°C (Minutes) | 20 min | 20 min | 0 min |
| ASTM D792 Specific Density (kg/m³) | 1120 kg/m³ | 1120 kg/m³ | 0 kg/m³ |
| US DOT 49 CFR & TDG Hazmat Class | Class 3 Flammable Liquid (UN1133) | Class 3 Flammable Liquid (UN1133) | Identical (UN1133) |
| Unit Price ($/kg USD) & Pack Price | $29.5/kg • $590 (19 L Industrial Pail) | $26.8/kg • $536 (19 L Industrial Pail) | +2.7 $/kg (+10.1 %) |
| US Stocking Warehouses | Hickory, NC • Danvers, MA • Tampa, FL | Hickory, NC • Danvers, MA • Tampa, FL | 1–3 Days LTL Dispatch |
Both matrices cross-link via free-radical polymerization using 1.25%–2.0% MEKP (Methyl Ethyl Ketone Peroxide, UN3105) or Cumene Hydroperoxide (CHP) with Cobalt Octoate promoter. Low-hydrogen-peroxide MEKP (e.g., Norox MEKP-925H) is recommended to eliminate micro-foaming.
Direct Drop-In Qualified: Thermal deflection (ASTM D648 HDT) differs by only 0 °C (82 °C vs. 82 °C). Existing mold cure and demold cycles can be maintained without thermal schedule modification.
Identical Hazmat Logistics Profile: Both SKUs ship under US DOT 49 CFR & Transport Canada TDG as Class 3 Flammable Liquid (UN Number: UN1133). Note 49 CFR § 177.848 segregation if ordering with Class 5.2 Organic Peroxides (UN3105).
Engineering FAQ: ITW Plexus MA300 Rapid-Cure Methacrylate Structural Adhesive vs. Scott Bader Crestabond M1-20 Primerless Methacrylate Adhesive
1. Is ITW Plexus MA300 Rapid-Cure Methacrylate Structural Adhesive a direct drop-in equivalent for Scott Bader Crestabond M1-20 Primerless Methacrylate Adhesive?▼
ITW Plexus MA300 Rapid-Cure Methacrylate Structural Adhesive (ITW Performance Polymers) and Scott Bader Crestabond M1-20 Primerless Methacrylate Adhesive (Scott Bader North America) achieve a 96.3% ASTM engineering compatibility score in Marine ISO/NPG Gelcoats, Structural Bonding Pastes & Mold Releases. Tensile strength delta is +1.5 MPa (+7.1%) and thermal HDT delta is 0 °C, making them qualified for direct drop-in substitution under standard cure schedules.
2. What is the ASTM D638 Tensile Strength and ASTM D648 HDT difference between ITW Plexus MA300 Rapid-Cure Methacrylate Structural Adhesive and Scott Bader Crestabond M1-20 Primerless Methacrylate Adhesive?▼
ITW Plexus MA300 Rapid-Cure Methacrylate Structural Adhesive (ITW Performance Polymers) delivers ASTM D638 Tensile Strength of 22.5 MPa (3,263 psi) and ASTM D648 HDT of 82 °C, whereas Scott Bader Crestabond M1-20 Primerless Methacrylate Adhesive (Scott Bader North America) delivers 21 MPa (3,046 psi) and HDT of 82 °C. The net delta is +1.5 MPa (+7.1 %) tensile and 0 °C HDT.
3. Do ITW Plexus MA300 Rapid-Cure Methacrylate Structural Adhesive and Scott Bader Crestabond M1-20 Primerless Methacrylate Adhesive use the same catalyst or hardener cure system?▼
Both matrices cross-link via free-radical polymerization using 1.25%–2.0% MEKP (Methyl Ethyl Ketone Peroxide, UN3105) or Cumene Hydroperoxide (CHP) with Cobalt Octoate promoter. Low-hydrogen-peroxide MEKP (e.g., Norox MEKP-925H) is recommended to eliminate micro-foaming. Direct Drop-In Qualified: Thermal deflection (ASTM D648 HDT) differs by only 0 °C (82 °C vs. 82 °C). Existing mold cure and demold cycles can be maintained without thermal schedule modification.
4. How do US DOT 49 CFR Hazmat shipping rules and B2B drum/pack prices compare between ITW Plexus MA300 Rapid-Cure Methacrylate Structural Adhesive and Scott Bader Crestabond M1-20 Primerless Methacrylate Adhesive?▼
Identical Hazmat Logistics Profile: Both SKUs ship under US DOT 49 CFR & Transport Canada TDG as Class 3 Flammable Liquid (UN Number: UN1133). Note 49 CFR § 177.848 segregation if ordering with Class 5.2 Organic Peroxides (UN3105). In US B2B distribution, ITW Plexus MA300 Rapid-Cure Methacrylate Structural Adhesive is priced at $590 per 19 L Industrial Pail ($29.5/kg) vs. $536 per 19 L Industrial Pail ($26.8/kg) for Scott Bader Crestabond M1-20 Primerless Methacrylate Adhesive (delta: +2.7 USD/kg).
Related Drop-In Comparisons in Marine ISO/NPG Gelcoats, Structural Bonding Pastes & Mold Releases
ITW Plexus MA300 Rapid-Cure Methacrylate Structural Adhesive (ITW Performance Polymers) and Scott Bader Crestabond M1-20 Primerless Methacrylate Adhesive (Scott Bader North America) are trademarks of their respective owners. CompositeMatrix Technologies Inc. is an independent North American B2B composite material intelligence registry; comparative ASTM D638, D648, D790, D2583, and D2196 figures are presented under the US legal doctrine of Nominative Fair Use (Lanham Act, 15 U.S.C. § 1125) and Feist Publications, Inc. v. Rural Telephone Service Co. (499 U.S. 340) for scientific and industrial cross-reference. Cure schedules, exotherm behavior, and laminate qualification must be verified by a licensed Naval Architect or Professional Engineer (PE) against current manufacturer batch Technical Data Sheets (TDS) and Safety Data Sheets (SDS).