ITW Plexus MA310 Structural Methacrylate Adhesive vs. Scott Bader Crestabond M1-20 Primerless Methacrylate Adhesive
ITW Plexus MA310 Structural Methacrylate Adhesive (ITW Performance Polymers) and Scott Bader Crestabond M1-20 Primerless Methacrylate Adhesive (Scott Bader North America) achieve a 96.5% ASTM engineering compatibility score in Marine ISO/NPG Gelcoats, Structural Bonding Pastes & Mold Releases. Tensile strength delta is -0.3 MPa (-1.4%) and thermal HDT delta is -4 °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 MA310 Structural Methacrylate 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-MA310-50GAL | Scott Bader North America • SCB-CREST-M120 | Cross-Brand OEM Equivalent |
| ASTM D638 Tensile Strength (MPa / PSI) | 20.7 MPa (3,002 psi) | 21 MPa (3,046 psi) | -0.3 MPa (-1.4 %) |
| ASTM D648 Heat Deflection Temp (HDT °C / °F) | 78 °C (172 °F) | 82 °C (180 °F) | -4 °C (Direct Thermal Match) |
| ASTM D790 Flexural Strength (MPa) | 34.5 MPa | 39 MPa | -4.5 MPa (-11.5 %) |
| ASTM D2583 Barcol Hardness | 35 | 40 | -5 Barcol |
| ASTM D2196 Brookfield Viscosity @ 25°C | 125000 cPs | 120000 cPs | +5000 cPs (+4.2 %) |
| Gel Time @ 25°C (Minutes) | 18 min | 20 min | -2 min |
| ASTM D792 Specific Density (kg/m³) | 980 kg/m³ | 1120 kg/m³ | -140 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 | $28.4/kg • $540 (19 L Pail (5 Gal Drum)) | $26.8/kg • $536 (19 L Industrial Pail) | +1.6 $/kg (+6 %) |
| US Stocking Warehouses | Danvers, MA • Tampa, FL • Mira Loma, CA | 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 4 °C (78 °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 MA310 Structural Methacrylate Adhesive vs. Scott Bader Crestabond M1-20 Primerless Methacrylate Adhesive
1. Is ITW Plexus MA310 Structural Methacrylate Adhesive a direct drop-in equivalent for Scott Bader Crestabond M1-20 Primerless Methacrylate Adhesive?▼
ITW Plexus MA310 Structural Methacrylate Adhesive (ITW Performance Polymers) and Scott Bader Crestabond M1-20 Primerless Methacrylate Adhesive (Scott Bader North America) achieve a 96.5% ASTM engineering compatibility score in Marine ISO/NPG Gelcoats, Structural Bonding Pastes & Mold Releases. Tensile strength delta is -0.3 MPa (-1.4%) and thermal HDT delta is -4 °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 MA310 Structural Methacrylate Adhesive and Scott Bader Crestabond M1-20 Primerless Methacrylate Adhesive?▼
ITW Plexus MA310 Structural Methacrylate Adhesive (ITW Performance Polymers) delivers ASTM D638 Tensile Strength of 20.7 MPa (3,002 psi) and ASTM D648 HDT of 78 °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 -0.3 MPa (-1.4 %) tensile and -4 °C HDT.
3. Do ITW Plexus MA310 Structural Methacrylate 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 4 °C (78 °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 MA310 Structural Methacrylate 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 MA310 Structural Methacrylate Adhesive is priced at $540 per 19 L Pail (5 Gal Drum) ($28.4/kg) vs. $536 per 19 L Industrial Pail ($26.8/kg) for Scott Bader Crestabond M1-20 Primerless Methacrylate Adhesive (delta: +1.6 USD/kg).
Related Drop-In Comparisons in Marine ISO/NPG Gelcoats, Structural Bonding Pastes & Mold Releases
ITW Plexus MA310 Structural Methacrylate 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).