TotalBoat Fathom Deep Pour Epoxy lets you apply deeper single layers than any other epoxy kit. This clear casting resin is ideal for deep casting and molding applications, river tables, sculptures, live-edge slab tables, and bar tops. Fathom allows layers of resin up to 3" deep for castings, and up to 2" deep for river tables or slab pours. This crystal-clear epoxy can be tinted with mica powder, alcohol inks, universal tints, or pigment paste dispersions. It features a simple 2:1 mix ratio by volume, and cures to a BPA-free, food-safe surface.

Product Information

Cleaner / Surface Preparation

Denatured alcohol; acetone, depending on substrate compatibility.

Cleanup

• Scrape up and remove uncured epoxy as needed.
• Denatured alcohol, lacquer thinner, or acetone may be used for uncured material.
• Cured epoxy must be removed mechanically.

Thinner / Reducer

Do not thin this product.

Colorants / Tints

Epoxy dyes, colorants, or special effects additives can be added and mixed in. Only use products designed for use with epoxy. Always perform a small test with Fathom and any colorant to ensure it achieves the desired result.

Mold Release Agents

Use mold release paste wax or an appropriate aerosol mold release agent.

Safety & PPE

Always wear proper safety equipment and use in a well-ventilated area per the Safety Data Sheet for each component.

Exothermic Reaction: The cure of TotalBoat Fathom is an exothermic reaction and will generate heat. A mass of epoxy can reach 200–300°F or hotter if poured thicker than advised.

Surface Preparation

• Clean all molds and dammed areas thoroughly to remove dust, oil, sap, or other contaminants.
• Wipe with a lint-free cotton rag dampened with denatured alcohol.
• Check molds for leaks; seal corners with silicone caulk, as Fathom’s low viscosity can seep through gaps.
• Use sheathing tape, Tyvek® tape, or mold release on mold interiors to prevent adhesion.
• Ensure molds or tables are well supported and level before pouring.
• When using rigid molds, apply 4–5 coats of release wax for best demolding results.

Wood & Porous Surfaces

When applying to wood or porous surfaces, always apply a thin skim coat of epoxy to seal the surface before a deep pour. This seal coat prevents air bubbles from off-gassing into the epoxy layer.

Note:Fathom cures too slowly to use as a seal coat. An epoxy such as TotalBoat High Performance Epoxy should be used for this purpose and allowed to cure firm before applying Fathom.

Application Conditions

• Ideal working temperature: 60–80°F for substrate, product, and air.
• For thicker pours, castings up to 3" or slab pours up to 2", 70°F is optimal.
• Warmer conditions accelerate curing; cooler conditions slow it down.
• Fathom generates delayed exothermic heat 6–20 hours after mixing.
• Not respecting pour limits or using high temperatures may lead to yellowing or cracking.
• If possible, use cooling tables or reduce ambient temperature when internal epoxy temperatures approach 100°F.
• Maintain even, consistent temperatures for the best surface finish.
• Avoid airflow from fans or vents that may disturb the surface.

Mixing

• Minimum pour volume: 1/2 gallon of mixed epoxy.
• Mix 2 parts Resin (Part A) to 1 part Hardener (Part B) by volume (2A:1B).
• By weight: 100 parts Resin to 44 parts Hardener.
• Do not deviate from this ratio, as it affects cure and clarity.
• Mix for 2–3 minutes, scraping sides and bottom, then pour into a clean container and mix another 2–3 minutes.
• A drill mixer may be used for larger batches.
• Add compatible tints or colorants as desired and mix thoroughly.
• Allow the mixed epoxy to rest 20–30 minutes to release air bubbles before pouring.

Application

River Tables & Slab Pours

For larger projects, do not exceed a pour depth of 2" to prevent yellowing or cracking. Step pouring multiple layers yields the best results when total depth exceeds 2".

Castings

For smaller molds, up to 1 gallon of mixed epoxy, pour up to 3" deep. For best results, avoid pours shallower than 1" as they extend cure time.

Bubbles

• Use a heat gun a few inches above freshly poured epoxy to remove surface bubbles.
• Do not overheat or scorch the surface.
• For pours up to 1.5", ambient temperatures can be raised to 90°F after 20 hours to speed curing.

Additional Layers

• Wait until the previous layer has cooled below 85°F and is firm before pouring additional layers.
• Typically, wait a minimum of 36 hours between pours.
• Use an infrared thermometer to check internal temperatures.
• Do not exceed the maximum pour depth per layer to avoid heat buildup.

Demolding

• Minimum demold time: 48 hours for deep pours; 72 hours for smaller pours.
• If epoxy feels soft or rubbery, do not demold yet.
• Keep demolded slabs flat and supported for up to 5 days to prevent sagging.

Application Data

Physical Data