ITW Plexus MA310 Structural Methacrylate Adhesive vs. Polynt Armorcote 950 High-UV Marine ISO/NPG Gelcoat
ITW Plexus MA310 Structural Methacrylate Adhesive (ITW Performance Polymers) and Polynt Armorcote 950 High-UV Marine ISO/NPG Gelcoat (Polynt Composites USA) achieve a 82% ASTM engineering compatibility score in Marine ISO/NPG Gelcoats, Structural Bonding Pastes & Mold Releases. Tensile strength delta is -53.3 MPa (-72%) and thermal HDT delta is -4 °C, making them interchangeable with post-cure temperature and viscosity flow adjustments.
Side-by-Side ASTM Mechanical, Thermal, Rheological & Pricing Delta
| ASTM Parameter | A: ITW Plexus MA310 Structural Methacrylate Adhesive (ITW Performance Polymers) | B: Polynt Armorcote 950 High-UV Marine ISO/NPG Gelcoat (Polynt Composites USA) | Engineering Delta (A vs. B) |
|---|---|---|---|
| OEM Manufacturer & SKU | ITW Performance Polymers • ITW-MA310-50GAL | Polynt Composites USA • POL-ARM950-DR | Cross-Brand OEM Equivalent |
| ASTM D638 Tensile Strength (MPa / PSI) | 20.7 MPa (3,002 psi) | 74 MPa (10,733 psi) | -53.3 MPa (-72 %) |
| 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 | 92 MPa | -57.5 MPa (-62.5 %) |
| ASTM D2583 Barcol Hardness | 35 | 40 | -5 Barcol |
| ASTM D2196 Brookfield Viscosity @ 25°C | 125000 cPs | 15500 cPs | +109500 cPs (+706.5 %) |
| 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 (UN1866) | UN1133 vs. UN1866 |
| Unit Price ($/kg USD) & Pack Price | $28.4/kg • $540 (19 L Pail (5 Gal Drum)) | $11.2/kg • $224 (19 L Industrial Pail) | +17.2 $/kg (+153.6 %) |
| 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.
Divergent Hazmat Profiles: ITW Plexus MA310 Structural Methacrylate Adhesive is classified as Class 3 Flammable Liquid (UN1133), whereas Polynt Armorcote 950 High-UV Marine ISO/NPG Gelcoat is classified as Class 3 Flammable Liquid (UN1866). Consolidate LTL freight accordingly.
Engineering FAQ: ITW Plexus MA310 Structural Methacrylate Adhesive vs. Polynt Armorcote 950 High-UV Marine ISO/NPG Gelcoat
1. Is ITW Plexus MA310 Structural Methacrylate Adhesive a direct drop-in equivalent for Polynt Armorcote 950 High-UV Marine ISO/NPG Gelcoat?▼
ITW Plexus MA310 Structural Methacrylate Adhesive (ITW Performance Polymers) and Polynt Armorcote 950 High-UV Marine ISO/NPG Gelcoat (Polynt Composites USA) achieve a 82% ASTM engineering compatibility score in Marine ISO/NPG Gelcoats, Structural Bonding Pastes & Mold Releases. Tensile strength delta is -53.3 MPa (-72%) and thermal HDT delta is -4 °C, making them interchangeable with post-cure temperature and viscosity flow adjustments.
2. What is the ASTM D638 Tensile Strength and ASTM D648 HDT difference between ITW Plexus MA310 Structural Methacrylate Adhesive and Polynt Armorcote 950 High-UV Marine ISO/NPG Gelcoat?▼
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 Polynt Armorcote 950 High-UV Marine ISO/NPG Gelcoat (Polynt Composites USA) delivers 74 MPa (10,733 psi) and HDT of 82 °C. The net delta is -53.3 MPa (-72 %) tensile and -4 °C HDT.
3. Do ITW Plexus MA310 Structural Methacrylate Adhesive and Polynt Armorcote 950 High-UV Marine ISO/NPG Gelcoat 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 Polynt Armorcote 950 High-UV Marine ISO/NPG Gelcoat?▼
Divergent Hazmat Profiles: ITW Plexus MA310 Structural Methacrylate Adhesive is classified as Class 3 Flammable Liquid (UN1133), whereas Polynt Armorcote 950 High-UV Marine ISO/NPG Gelcoat is classified as Class 3 Flammable Liquid (UN1866). Consolidate LTL freight accordingly. 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. $224 per 19 L Industrial Pail ($11.2/kg) for Polynt Armorcote 950 High-UV Marine ISO/NPG Gelcoat (delta: +17.2 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 Polynt Armorcote 950 High-UV Marine ISO/NPG Gelcoat (Polynt Composites USA) 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).