PRO-SET LAM-125 Medium Viscosity Laminating Epoxy vs. West System® 105 Epoxy Resin
PRO-SET LAM-125 Medium Viscosity Laminating Epoxy (Gougeon Brothers (PRO-SET)) and West System® 105 Epoxy Resin (Gougeon Brothers) achieve a 78.5% ASTM engineering compatibility score in Structural Infusion & Laminating Epoxy Systems. Tensile strength delta is +24.2 MPa (+45%) and thermal HDT delta is +30.7 °C, making them interchangeable with post-cure temperature and viscosity flow adjustments.
Side-by-Side ASTM Mechanical, Thermal, Rheological & Pricing Delta
| ASTM Parameter | A: PRO-SET LAM-125 Medium Viscosity Laminating Epoxy (Gougeon Brothers (PRO-SET)) | B: West System® 105 Epoxy Resin (Gougeon Brothers) | Engineering Delta (A vs. B) |
|---|---|---|---|
| OEM Manufacturer & SKU | Gougeon Brothers (PRO-SET) • PRO-LAM125-55G | Gougeon Brothers • GOU-WS105-55G | Cross-Brand OEM Equivalent |
| ASTM D638 Tensile Strength (MPa / PSI) | 78 MPa (11,313 psi) | 53.8 MPa (7,800 psi) | +24.2 MPa (+45 %) |
| ASTM D648 Heat Deflection Temp (HDT °C / °F) | 84 °C (183 °F) | 53.3 °C (128 °F) | +30.7 °C (Verify Post-Cure) |
| ASTM D790 Flexural Strength (MPa) | 122 MPa | 78 MPa | +44 MPa (+56.4 %) |
| ASTM D2583 Barcol Hardness | 42 | 34 | +8 Barcol |
| ASTM D2196 Brookfield Viscosity @ 25°C | 780 cPs | 975 cPs | -195 cPs (-20 %) |
| Gel Time @ 25°C (Minutes) | 52 min | 35 min | +17 min |
| ASTM D792 Specific Density (kg/m³) | 1145 kg/m³ | 1120 kg/m³ | +25 kg/m³ |
| US DOT 49 CFR & TDG Hazmat Class | Class 9 Environmentally Hazardous (UN3082) | Non-Regulated Ground / Class 8 Hardener (N/A) | UN3082 vs. N/A |
| Unit Price ($/kg USD) & Pack Price | $15.6/kg • $3,120 (200 kg Drum Kit) | $9.75/kg • $1,950 (55-Gal Drum) | +5.85 $/kg (+60 %) |
| US Stocking Warehouses | Bay City, MI • Tampa, FL • Seattle, WA | FL • ME • WA • MN • CA | 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 30.7 °C (84 °C vs. 53.3 °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.
Divergent Hazmat Profiles: PRO-SET LAM-125 Medium Viscosity Laminating Epoxy is classified as Class 9 Environmentally Hazardous (UN3082), whereas West System® 105 Epoxy Resin is classified as Non-Regulated Ground / Class 8 Hardener (N/A). Consolidate LTL freight accordingly.
Engineering FAQ: PRO-SET LAM-125 Medium Viscosity Laminating Epoxy vs. West System® 105 Epoxy Resin
1. Is PRO-SET LAM-125 Medium Viscosity Laminating Epoxy a direct drop-in equivalent for West System® 105 Epoxy Resin?▼
PRO-SET LAM-125 Medium Viscosity Laminating Epoxy (Gougeon Brothers (PRO-SET)) and West System® 105 Epoxy Resin (Gougeon Brothers) achieve a 78.5% ASTM engineering compatibility score in Structural Infusion & Laminating Epoxy Systems. Tensile strength delta is +24.2 MPa (+45%) and thermal HDT delta is +30.7 °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 PRO-SET LAM-125 Medium Viscosity Laminating Epoxy and West System® 105 Epoxy Resin?▼
PRO-SET LAM-125 Medium Viscosity Laminating Epoxy (Gougeon Brothers (PRO-SET)) delivers ASTM D638 Tensile Strength of 78 MPa (11,313 psi) and ASTM D648 HDT of 84 °C, whereas West System® 105 Epoxy Resin (Gougeon Brothers) delivers 53.8 MPa (7,800 psi) and HDT of 53.3 °C. The net delta is +24.2 MPa (+45 %) tensile and +30.7 °C HDT.
3. Do PRO-SET LAM-125 Medium Viscosity Laminating Epoxy and West System® 105 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 30.7 °C (84 °C vs. 53.3 °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 PRO-SET LAM-125 Medium Viscosity Laminating Epoxy and West System® 105 Epoxy Resin?▼
Divergent Hazmat Profiles: PRO-SET LAM-125 Medium Viscosity Laminating Epoxy is classified as Class 9 Environmentally Hazardous (UN3082), whereas West System® 105 Epoxy Resin is classified as Non-Regulated Ground / Class 8 Hardener (N/A). Consolidate LTL freight accordingly. In US B2B distribution, PRO-SET LAM-125 Medium Viscosity Laminating Epoxy is priced at $3,120 per 200 kg Drum Kit ($15.6/kg) vs. $1,950 per 55-Gal Drum ($9.75/kg) for West System® 105 Epoxy Resin (delta: +5.85 USD/kg).
Related Drop-In Comparisons in Structural Infusion & Laminating Epoxy Systems
PRO-SET LAM-125 Medium Viscosity Laminating Epoxy (Gougeon Brothers (PRO-SET)) and West System® 105 Epoxy Resin (Gougeon Brothers) 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).