System Three SilverTip Marine Laminating Epoxy vs. WEST SYSTEM 105-B Marine Grade Epoxy Resin
System Three SilverTip Marine Laminating Epoxy (System Three Resins) and WEST SYSTEM 105-B Marine Grade Epoxy Resin (Gougeon Brothers (WEST SYSTEM)) achieve a 94.3% ASTM engineering compatibility score in Structural Infusion & Laminating Epoxy Systems. Tensile strength delta is +2 MPa (+2.7%) and thermal HDT delta is +8 °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: System Three SilverTip Marine Laminating Epoxy (System Three Resins) | B: WEST SYSTEM 105-B Marine Grade Epoxy Resin (Gougeon Brothers (WEST SYSTEM)) | Engineering Delta (A vs. B) |
|---|---|---|---|
| OEM Manufacturer & SKU | System Three Resins • SYS3-SLVTIP-55G | Gougeon Brothers (WEST SYSTEM) • WST-105B-5GAL | Cross-Brand OEM Equivalent |
| ASTM D638 Tensile Strength (MPa / PSI) | 75 MPa (10,878 psi) | 73 MPa (10,588 psi) | +2 MPa (+2.7 %) |
| ASTM D648 Heat Deflection Temp (HDT °C / °F) | 76 °C (169 °F) | 68 °C (154 °F) | +8 °C (Verify Post-Cure) |
| ASTM D790 Flexural Strength (MPa) | 119 MPa | 117 MPa | +2 MPa (+1.7 %) |
| ASTM D2583 Barcol Hardness | 42 | 42 | 0 Barcol |
| ASTM D2196 Brookfield Viscosity @ 25°C | 550 cPs | 975 cPs | -425 cPs (-43.6 %) |
| Gel Time @ 25°C (Minutes) | 52 min | 52 min | 0 min |
| ASTM D792 Specific Density (kg/m³) | 1145 kg/m³ | 1145 kg/m³ | 0 kg/m³ |
| US DOT 49 CFR & TDG Hazmat Class | Class 9 Environmentally Hazardous (UN3082) | Class 9 Environmentally Hazardous (UN3082) | Identical (UN3082) |
| Unit Price ($/kg USD) & Pack Price | $15.8/kg • $3,160 (200 kg Drum Kit) | $16.2/kg • $3,240 (200 kg Drum Kit) | -0.4 $/kg (-2.5 %) |
| US Stocking Warehouses | Bay City, MI • Tampa, FL • Seattle, WA | Bay City, MI • Tampa, FL • Seattle, WA | 1–3 Days LTL Dispatch |
Both systems utilize stoichiometric Amine / Polyetheramine Hardeners. Verify exact mix ratio by weight (pbw) on the batch TDS before metering—never substitute hardeners across manufacturers without DSC glass-transition (Tg) qualification.
Post-Cure Schedule Adjustment Advised: ASTM D648 HDT differs by 8 °C (76 °C vs. 68 °C). For elevated-temperature tooling or dark-colored marine hulls, perform a 4–6 hour post-cure ramp at 60–80 °C (140–176 °F) to lock in full cross-link density.
Identical Hazmat Logistics Profile: Both SKUs ship under US DOT 49 CFR & Transport Canada TDG as Class 9 Environmentally Hazardous (UN Number: UN3082). Note 49 CFR § 177.848 segregation if ordering with Class 5.2 Organic Peroxides (UN3105).
Engineering FAQ: System Three SilverTip Marine Laminating Epoxy vs. WEST SYSTEM 105-B Marine Grade Epoxy Resin
1. Is System Three SilverTip Marine Laminating Epoxy a direct drop-in equivalent for WEST SYSTEM 105-B Marine Grade Epoxy Resin?▼
System Three SilverTip Marine Laminating Epoxy (System Three Resins) and WEST SYSTEM 105-B Marine Grade Epoxy Resin (Gougeon Brothers (WEST SYSTEM)) achieve a 94.3% ASTM engineering compatibility score in Structural Infusion & Laminating Epoxy Systems. Tensile strength delta is +2 MPa (+2.7%) and thermal HDT delta is +8 °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 System Three SilverTip Marine Laminating Epoxy and WEST SYSTEM 105-B Marine Grade Epoxy Resin?▼
System Three SilverTip Marine Laminating Epoxy (System Three Resins) delivers ASTM D638 Tensile Strength of 75 MPa (10,878 psi) and ASTM D648 HDT of 76 °C, whereas WEST SYSTEM 105-B Marine Grade Epoxy Resin (Gougeon Brothers (WEST SYSTEM)) delivers 73 MPa (10,588 psi) and HDT of 68 °C. The net delta is +2 MPa (+2.7 %) tensile and +8 °C HDT.
3. Do System Three SilverTip Marine Laminating Epoxy and WEST SYSTEM 105-B Marine Grade Epoxy Resin use the same catalyst or hardener cure system?▼
Both systems utilize stoichiometric Amine / Polyetheramine Hardeners. Verify exact mix ratio by weight (pbw) on the batch TDS before metering—never substitute hardeners across manufacturers without DSC glass-transition (Tg) qualification. Post-Cure Schedule Adjustment Advised: ASTM D648 HDT differs by 8 °C (76 °C vs. 68 °C). For elevated-temperature tooling or dark-colored marine hulls, perform a 4–6 hour post-cure ramp at 60–80 °C (140–176 °F) to lock in full cross-link density.
4. How do US DOT 49 CFR Hazmat shipping rules and B2B drum/pack prices compare between System Three SilverTip Marine Laminating Epoxy and WEST SYSTEM 105-B Marine Grade Epoxy Resin?▼
Identical Hazmat Logistics Profile: Both SKUs ship under US DOT 49 CFR & Transport Canada TDG as Class 9 Environmentally Hazardous (UN Number: UN3082). Note 49 CFR § 177.848 segregation if ordering with Class 5.2 Organic Peroxides (UN3105). In US B2B distribution, System Three SilverTip Marine Laminating Epoxy is priced at $3,160 per 200 kg Drum Kit ($15.8/kg) vs. $3,240 per 200 kg Drum Kit ($16.2/kg) for WEST SYSTEM 105-B Marine Grade Epoxy Resin (delta: -0.4 USD/kg).
Related Drop-In Comparisons in Structural Infusion & Laminating Epoxy Systems
System Three SilverTip Marine Laminating Epoxy (System Three Resins) and WEST SYSTEM 105-B Marine Grade Epoxy Resin (Gougeon Brothers (WEST SYSTEM)) 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).