Gurit Ampreg 31 DNV-GL Certified Laminating Epoxy vs. Sicomin SR 5550 Lloyd's Approved Structural Epoxy
Gurit Ampreg 31 DNV-GL Certified Laminating Epoxy (Gurit) and Sicomin SR 5550 Lloyd's Approved Structural Epoxy (Sicomin North America) achieve a 97.4% ASTM engineering compatibility score in Structural Infusion & Laminating Epoxy Systems. Tensile strength delta is +1 MPa (+1.3%) and thermal HDT delta is +2 °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: Gurit Ampreg 31 DNV-GL Certified Laminating Epoxy (Gurit) | B: Sicomin SR 5550 Lloyd's Approved Structural Epoxy (Sicomin North America) | Engineering Delta (A vs. B) |
|---|---|---|---|
| OEM Manufacturer & SKU | Gurit • GUR-AMP31-200KG | Sicomin North America • SIC-SR5550-200KG | Cross-Brand OEM Equivalent |
| ASTM D638 Tensile Strength (MPa / PSI) | 81 MPa (11,748 psi) | 80 MPa (11,603 psi) | +1 MPa (+1.3 %) |
| ASTM D648 Heat Deflection Temp (HDT °C / °F) | 89 °C (192 °F) | 87 °C (189 °F) | +2 °C (Direct Thermal Match) |
| ASTM D790 Flexural Strength (MPa) | 125 MPa | 124 MPa | +1 MPa (+0.8 %) |
| ASTM D2583 Barcol Hardness | 42 | 42 | 0 Barcol |
| ASTM D2196 Brookfield Viscosity @ 25°C | 420 cPs | 640 cPs | -220 cPs (-34.4 %) |
| 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 | $15.4/kg • $3,080 (200 kg Drum Kit) | $15.1/kg • $3,020 (200 kg Drum Kit) | +0.3 $/kg (+2 %) |
| 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.
Direct Drop-In Qualified: Thermal deflection (ASTM D648 HDT) differs by only 2 °C (89 °C vs. 87 °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 9 Environmentally Hazardous (UN Number: UN3082). Note 49 CFR § 177.848 segregation if ordering with Class 5.2 Organic Peroxides (UN3105).
Engineering FAQ: Gurit Ampreg 31 DNV-GL Certified Laminating Epoxy vs. Sicomin SR 5550 Lloyd's Approved Structural Epoxy
1. Is Gurit Ampreg 31 DNV-GL Certified Laminating Epoxy a direct drop-in equivalent for Sicomin SR 5550 Lloyd's Approved Structural Epoxy?▼
Gurit Ampreg 31 DNV-GL Certified Laminating Epoxy (Gurit) and Sicomin SR 5550 Lloyd's Approved Structural Epoxy (Sicomin North America) achieve a 97.4% ASTM engineering compatibility score in Structural Infusion & Laminating Epoxy Systems. Tensile strength delta is +1 MPa (+1.3%) and thermal HDT delta is +2 °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 Gurit Ampreg 31 DNV-GL Certified Laminating Epoxy and Sicomin SR 5550 Lloyd's Approved Structural Epoxy?▼
Gurit Ampreg 31 DNV-GL Certified Laminating Epoxy (Gurit) delivers ASTM D638 Tensile Strength of 81 MPa (11,748 psi) and ASTM D648 HDT of 89 °C, whereas Sicomin SR 5550 Lloyd's Approved Structural Epoxy (Sicomin North America) delivers 80 MPa (11,603 psi) and HDT of 87 °C. The net delta is +1 MPa (+1.3 %) tensile and +2 °C HDT.
3. Do Gurit Ampreg 31 DNV-GL Certified Laminating Epoxy and Sicomin SR 5550 Lloyd's Approved Structural Epoxy 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. Direct Drop-In Qualified: Thermal deflection (ASTM D648 HDT) differs by only 2 °C (89 °C vs. 87 °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 Gurit Ampreg 31 DNV-GL Certified Laminating Epoxy and Sicomin SR 5550 Lloyd's Approved Structural Epoxy?▼
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, Gurit Ampreg 31 DNV-GL Certified Laminating Epoxy is priced at $3,080 per 200 kg Drum Kit ($15.4/kg) vs. $3,020 per 200 kg Drum Kit ($15.1/kg) for Sicomin SR 5550 Lloyd's Approved Structural Epoxy (delta: +0.3 USD/kg).
Related Drop-In Comparisons in Structural Infusion & Laminating Epoxy Systems
Gurit Ampreg 31 DNV-GL Certified Laminating Epoxy (Gurit) and Sicomin SR 5550 Lloyd's Approved Structural Epoxy (Sicomin 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).