epoxyresinWhat to check before choosing this formula
| Mix A : B by volume | 2 : 1 |
|---|---|
| Mix A : B by weight | 100 : 44 |
| Layer and pour limits | River/slab ≤2 in; smaller mold ≤3 in and ≤1 mixed gallon. Avoid <1 in. |
| Working and curing context | Working 4–6 h mass-dependent. Demold ≥48 h deeper/larger; ≥72 h smaller, only firm. Recoat conservative ≥36 h; accelerated ≥24 h, center <85°F and firm. Full cure differs between the linked technical sheet (5–7 days) and current product data (5–10 days). Confirm the schedule for the exact kit and pour conditions before finishing or full service. |
| Workshop conditions | 60–80°F, 0–80% RH; optimal thicker-pour temperature 70°F. |
Compare 1.5 gallons kit on Amazon
TotalBoat Fathom: check the selected 1.5 gallons kit, included components and current offer. Read the formula limits before choosing it for your project.
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View 1.5 gallons kit on Amazon ↗Fathom: allow for the delayed heat and long finishing schedule
Fathom's slow reaction gives a maker time to place inclusions and organize a substantial casting. That same behavior makes it a poor default for a thin seal coat or a tiny craft mold. TotalBoat advises using another suitable epoxy to seal porous wood before the deep pour.
The main depth limits are two inches for river or slab pours and three inches for a smaller mold holding no more than one mixed gallon. A short initial period without obvious heat does not establish that a pour is under control: the technical sheet describes noticeable heat developing six to twenty hours after mixing.
Budget conservatively for finishing. The linked technical sheet gives five to seven days for full cure, while the product page says five to ten. Treat that disagreement as a reason to check the current kit guidance, rather than selecting the faster number for a deadline.
Fathom mixing, transfer and instructed rest
Fathom permits drill mixing for 2–3 minutes, followed by transfer and another 2–3 minutes of mixing. Its procedure also includes a 20–30-minute rest.
The recommended half-gallon minimum concerns pour volume. It is not a universal maximum batch size, and it does not remove the separate depth and smaller-mold limits.
Delayed heat, firmness and the finishing deadline
Working 4–6 h mass-dependent. Demold ≥48 h deeper/larger; ≥72 h smaller, only firm. Recoat conservative ≥36 h; accelerated ≥24 h, center <85°F and firm.
Full cure differs between the linked technical sheet (5–7 days) and current product data (5–10 days). Confirm the schedule for the exact kit and pour conditions before finishing or full service.
Keep Fathom’s pour quantity and room conditions in the record until the casting is ready for finishing. Before adding a layer or demolding, check the specified cooling and firmness conditions as well as elapsed time. A firm exterior alone cannot resolve the conflicting full-cure schedules in the manufacturer documents.
Limitations & open questions
- TDS full cure 5–7 d; product technical data 5–10 d.
- Do not substitute heat-deflection values for hot-object service limits.
A depth ceiling is only one condition. Verify total mixed mass, geometry, temperature and the exact kit revision before planning a pour. A smaller package of the same formula does not automatically change its operating limits.
Exact kit options
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Check the selected kit before ordering
TotalBoat Fathom: check the selected 1.5 gallons kit, included components and current offer. Read the formula limits before choosing it for your project.
As an Amazon Associate I earn from qualifying purchases. We may earn a commission from the paid links on this page. How affiliate links work.
View 1.5 gallons kit on Amazon ↗Sources & further reading
Manufacturer documents can change. Match the full formula name and kit instructions. This page is based on document research, not our own product testing.
