{
  "title": "2026 MixByParts Epoxy Mixing Instructions Review",
  "reviewDate": "2026-11-11",
  "scope": "An original AI-assisted descriptive audit of twelve selected resin-and-hardener pairings across five manufacturers. Examines stated volume and weight recipes, exact pairing, source market, edition and unresolved context. Not a representative survey, cure test or product approval.",
  "unitOfAnalysis": "One exact resin/hardener pairing in its stated source context. Shared source documents are not independent studies.",
  "sampleRule": "Twelve named pairings selected for a convenience sample of laminating, coating and casting systems across five manufacturers. Freeze before source coding; retain inaccessible or unresolved fields. Shared documents and multiple hardener pairings are not independent studies. All source contexts are identified; no global-market or current-edition claim.",
  "coding": {
    "both": "Both volume and weight ratios are explicitly stated for the pairing.",
    "weight_only": "A weight ratio is stated and volume measurement is explicitly prohibited in the reviewed source.",
    "volume_only": "A volume ratio is established but no applicable weight ratio was established.",
    "not_established": "A measurement basis could not be established from the reviewed source."
  },
  "contextSources": [
    {
      "id": "aa2d17b0404e",
      "url": "https://support.totalboat.com/hc/en-us/articles/42707760789787-TotalBoat-High-Performance-Epoxy-System-Instruction-Sheet-and-TDS",
      "title": "High Performance instructions — calibrated pumps and gel-time context",
      "edition": "Support article updated 9 June 2026; no separate bulletin revision established",
      "accessDate": "2026-11-11",
      "retrieval": "web_text",
      "sha256": null
    }
  ],
  "records": [
    {
      "id": "west_205",
      "manufacturer": "WEST SYSTEM",
      "resin": "105 Epoxy Resin",
      "hardener": "205 Fast Hardener",
      "market": "US technical sheet; do not substitute a European recipe",
      "basis": "both",
      "volume": [
        5,
        1
      ],
      "weight": [
        5.19,
        1
      ],
      "locator": "Page 1, Handling Characteristics",
      "observation": "Separate volume and weight recipes are explicitly printed.",
      "reviewNote": "Printed October 2014; linked by the retrieved manufacturer comparison page. Access date does not establish a new revision.",
      "sources": [
        {
          "id": "0388a9022251",
          "url": "https://www.westsystem.com/app/uploads/2022/12/105-205-Epoxy-Resin.pdf",
          "title": "US 105/205 technical data sheet",
          "edition": "October 2014",
          "accessDate": "2026-11-11",
          "retrieval": "direct_download",
          "sha256": "4b2d05d8db55cbd0e941110cc3018f75ed83effee3a22305e7973016a3881e9f"
        },
        {
          "id": "621cf0db0286",
          "url": "https://www.westsystem.com/compare-epoxy-physical-properties/",
          "title": "Manufacturer comparison page linking the US sheets",
          "edition": "Undated webpage; retrieved 11 November 2026",
          "accessDate": "2026-11-11",
          "retrieval": "direct_download",
          "sha256": "b87961287fd1024914c62e2c92bcb94928b63bda7dfcb1977ebff4037c41b6dc"
        }
      ]
    },
    {
      "id": "west_206",
      "manufacturer": "WEST SYSTEM",
      "resin": "105 Epoxy Resin",
      "hardener": "206 Slow Hardener",
      "market": "US technical sheet; do not substitute a European recipe",
      "basis": "both",
      "volume": [
        5,
        1
      ],
      "weight": [
        5.36,
        1
      ],
      "locator": "Page 1, Handling Characteristics",
      "observation": "Separate volume and weight recipes are explicitly printed.",
      "reviewNote": "Printed October 2014; linked by the retrieved manufacturer comparison page. Access date does not establish a new revision.",
      "sources": [
        {
          "id": "fdd08e5f9598",
          "url": "https://www.westsystem.com/app/uploads/2022/12/105-206-Epoxy-Resin.pdf",
          "title": "US 105/206 technical data sheet",
          "edition": "October 2014",
          "accessDate": "2026-11-11",
          "retrieval": "direct_download",
          "sha256": "7059913466c5929cdab1996c6f9594cf6687641146819f56e1015a92748e1540"
        },
        {
          "id": "621cf0db0286",
          "url": "https://www.westsystem.com/compare-epoxy-physical-properties/",
          "title": "Manufacturer comparison page linking the US sheets",
          "edition": "Undated webpage; retrieved 11 November 2026",
          "accessDate": "2026-11-11",
          "retrieval": "direct_download",
          "sha256": "b87961287fd1024914c62e2c92bcb94928b63bda7dfcb1977ebff4037c41b6dc"
        }
      ]
    },
    {
      "id": "west_207",
      "manufacturer": "WEST SYSTEM",
      "resin": "105 Epoxy Resin",
      "hardener": "207 Special Clear Hardener",
      "market": "US technical sheet; do not substitute a European recipe",
      "basis": "both",
      "volume": [
        3,
        1
      ],
      "weight": [
        3.64,
        1
      ],
      "locator": "Page 1, Handling Characteristics",
      "observation": "Separate volume and weight recipes are explicitly printed.",
      "reviewNote": "Printed October 2014; linked by the retrieved manufacturer comparison page. Access date does not establish a new revision.",
      "sources": [
        {
          "id": "776094583352",
          "url": "https://www.westsystem.com/app/uploads/2022/12/105-207-Epoxy-Resin.pdf",
          "title": "US 105/207 technical data sheet",
          "edition": "October 2014",
          "accessDate": "2026-11-11",
          "retrieval": "direct_download",
          "sha256": "b4ea521b10076c9daac5807841cc1faef6f149a79293a9a4b2a96f36564fbd87"
        },
        {
          "id": "621cf0db0286",
          "url": "https://www.westsystem.com/compare-epoxy-physical-properties/",
          "title": "Manufacturer comparison page linking the US sheets",
          "edition": "Undated webpage; retrieved 11 November 2026",
          "accessDate": "2026-11-11",
          "retrieval": "direct_download",
          "sha256": "b87961287fd1024914c62e2c92bcb94928b63bda7dfcb1977ebff4037c41b6dc"
        }
      ]
    },
    {
      "id": "tb_fast",
      "manufacturer": "TotalBoat",
      "resin": "High Performance Epoxy Resin",
      "hardener": "High Performance Fast Hardener",
      "market": "US manufacturer product page",
      "basis": "both",
      "volume": [
        2,
        1
      ],
      "weight": [
        100,
        46
      ],
      "locator": "Properties (Admixed), matching hardener column",
      "observation": "The shared volume recipe has a hardener-specific weight row.",
      "reviewNote": "Undated page; check the exact pairing. This is not the Traditional 5:1 system.",
      "sources": [
        {
          "id": "cdbb15265ba5",
          "url": "https://www.totalboat.com/products/high-performance-epoxy-resin",
          "title": "High Performance Epoxy Resin — manufacturer properties table",
          "edition": "Undated product page",
          "accessDate": "2026-11-11",
          "retrieval": "web_text",
          "sha256": null
        }
      ]
    },
    {
      "id": "tb_medium",
      "manufacturer": "TotalBoat",
      "resin": "High Performance Epoxy Resin",
      "hardener": "High Performance Medium Hardener",
      "market": "US manufacturer product page",
      "basis": "both",
      "volume": [
        2,
        1
      ],
      "weight": [
        100,
        45
      ],
      "locator": "Properties (Admixed), matching hardener column",
      "observation": "The shared volume recipe has a hardener-specific weight row.",
      "reviewNote": "Undated page; check the exact pairing. This is not the Traditional 5:1 system.",
      "sources": [
        {
          "id": "cdbb15265ba5",
          "url": "https://www.totalboat.com/products/high-performance-epoxy-resin",
          "title": "High Performance Epoxy Resin — manufacturer properties table",
          "edition": "Undated product page",
          "accessDate": "2026-11-11",
          "retrieval": "web_text",
          "sha256": null
        }
      ]
    },
    {
      "id": "tb_slow",
      "manufacturer": "TotalBoat",
      "resin": "High Performance Epoxy Resin",
      "hardener": "High Performance Slow Hardener",
      "market": "US manufacturer product page",
      "basis": "both",
      "volume": [
        2,
        1
      ],
      "weight": [
        100,
        45
      ],
      "locator": "Properties (Admixed), matching hardener column",
      "observation": "The shared volume recipe has a hardener-specific weight row.",
      "reviewNote": "Undated page; check the exact pairing. This is not the Traditional 5:1 system.",
      "sources": [
        {
          "id": "cdbb15265ba5",
          "url": "https://www.totalboat.com/products/high-performance-epoxy-resin",
          "title": "High Performance Epoxy Resin — manufacturer properties table",
          "edition": "Undated product page",
          "accessDate": "2026-11-11",
          "retrieval": "web_text",
          "sha256": null
        }
      ]
    },
    {
      "id": "st_fast",
      "manufacturer": "System Three",
      "resin": "SilverTip Epoxy Resin",
      "hardener": "SilverTip Fast Hardener",
      "market": "US manufacturer English product page",
      "basis": "both",
      "volume": [
        2,
        1
      ],
      "weight": [
        100,
        44
      ],
      "locator": "Description naming fast/slow hardeners; Properties, Mix Ratio",
      "observation": "The system page gives both ratios and names both hardeners.",
      "reviewNote": "The shared system-level ratio box supports both named options; these are not independent documents.",
      "sources": [
        {
          "id": "418b26635722",
          "url": "https://www.systemthree.com/products/silvertip-laminating-epoxy-resin",
          "title": "SilverTip Epoxy Resin — manufacturer instructions",
          "edition": "Undated product page",
          "accessDate": "2026-11-11",
          "retrieval": "web_text",
          "sha256": null
        }
      ]
    },
    {
      "id": "st_slow",
      "manufacturer": "System Three",
      "resin": "SilverTip Epoxy Resin",
      "hardener": "SilverTip Slow Hardener",
      "market": "US manufacturer English product page",
      "basis": "both",
      "volume": [
        2,
        1
      ],
      "weight": [
        100,
        44
      ],
      "locator": "Description naming fast/slow hardeners; Properties, Mix Ratio",
      "observation": "The system page gives both ratios and names both hardeners.",
      "reviewNote": "The shared system-level ratio box supports both named options; these are not independent documents.",
      "sources": [
        {
          "id": "418b26635722",
          "url": "https://www.systemthree.com/products/silvertip-laminating-epoxy-resin",
          "title": "SilverTip Epoxy Resin — manufacturer instructions",
          "edition": "Undated product page",
          "accessDate": "2026-11-11",
          "retrieval": "web_text",
          "sha256": null
        }
      ]
    },
    {
      "id": "smooth_690",
      "manufacturer": "Smooth-On",
      "resin": "EpoxAcast 690 Part A",
      "hardener": "Matching Part B",
      "market": "Manufacturer English technical bulletin",
      "basis": "weight_only",
      "volume": null,
      "weight": [
        100,
        30
      ],
      "locator": "Page 1, Handling Properties and Measuring / Mixing",
      "observation": "A weight recipe and digital gram scale are specified.",
      "reviewNote": "The bulletin explicitly prohibits measuring components by volume. Mixed specific gravity is not a component-ratio conversion.",
      "sources": [
        {
          "id": "4f79b493af43",
          "url": "https://www.smooth-on.com/tb/files/EPOXACAST_690_692_TB.pdf",
          "title": "EpoxAcast 690 / 692 Deep Pour technical bulletin",
          "edition": "No printed revision date established",
          "accessDate": "2026-11-11",
          "retrieval": "direct_download",
          "sha256": "3f4048d32f92b79be824bc0b44895ef3a8139daa836766631d6a2ece36274d7d"
        }
      ]
    },
    {
      "id": "smooth_692",
      "manufacturer": "Smooth-On",
      "resin": "EpoxAcast 692 Deep Pour Part A",
      "hardener": "Matching Part B",
      "market": "Manufacturer English technical bulletin",
      "basis": "weight_only",
      "volume": null,
      "weight": [
        100,
        40
      ],
      "locator": "Page 1, Handling Properties and Measuring / Mixing",
      "observation": "A weight recipe and digital gram scale are specified.",
      "reviewNote": "The bulletin explicitly prohibits measuring components by volume. Mixed specific gravity is not a component-ratio conversion.",
      "sources": [
        {
          "id": "4f79b493af43",
          "url": "https://www.smooth-on.com/tb/files/EPOXACAST_690_692_TB.pdf",
          "title": "EpoxAcast 690 / 692 Deep Pour technical bulletin",
          "edition": "No printed revision date established",
          "accessDate": "2026-11-11",
          "retrieval": "direct_download",
          "sha256": "3f4048d32f92b79be824bc0b44895ef3a8139daa836766631d6a2ece36274d7d"
        }
      ]
    },
    {
      "id": "mas_table",
      "manufacturer": "MAS Epoxies",
      "resin": "Table Top Pro Resin",
      "hardener": "Matching Table Top Pro Hardener",
      "market": "US manufacturer FAQ; standard named product",
      "basis": "both",
      "volume": [
        1,
        1
      ],
      "weight": [
        100,
        83
      ],
      "locator": "Named product FAQ: What is the mix ratio?",
      "observation": "The named product FAQ explicitly supplies both measuring recipes.",
      "reviewNote": "Use the exact product. Standard Deep Pour is distinct from Deep Pour X. Older PDF leads returned 404 and were excluded.",
      "sources": [
        {
          "id": "224883472108",
          "url": "https://masepoxies.com/pages/faq",
          "title": "Manufacturer FAQ — Tabletop Pro and standard Deep Pour",
          "edition": "Undated FAQ",
          "accessDate": "2026-11-11",
          "retrieval": "direct_download",
          "sha256": "bdba0dfb1c5eb32af873e3406a644b6e9d94a3322a84523b4ae9fcfa1ed468ec"
        }
      ]
    },
    {
      "id": "mas_deep",
      "manufacturer": "MAS Epoxies",
      "resin": "Deep Pour (standard) Resin",
      "hardener": "Matching Deep Pour (standard) Hardener",
      "market": "US manufacturer FAQ; standard named product",
      "basis": "both",
      "volume": [
        3,
        1
      ],
      "weight": [
        100,
        28
      ],
      "locator": "Named product FAQ: What is the mix ratio?",
      "observation": "The named product FAQ explicitly supplies both measuring recipes.",
      "reviewNote": "Use the exact product. Standard Deep Pour is distinct from Deep Pour X. Older PDF leads returned 404 and were excluded.",
      "sources": [
        {
          "id": "224883472108",
          "url": "https://masepoxies.com/pages/faq",
          "title": "Manufacturer FAQ — Tabletop Pro and standard Deep Pour",
          "edition": "Undated FAQ",
          "accessDate": "2026-11-11",
          "retrieval": "direct_download",
          "sha256": "bdba0dfb1c5eb32af873e3406a644b6e9d94a3322a84523b4ae9fcfa1ed468ec"
        }
      ]
    }
  ]
}