Maximum pour depth is not a universal number. This page explains what limits depth and why product documentation matters before a user buys resin.
Direct Answer
The maximum is a limit for an exact resin/hardener combination under stated conditions, not a universal depth for epoxy. PrimaLoc publishes a maximum 1/8 in layer for its bar/tabletop product. Before casting, also check your own product's maximum mixed volume, temperature range and mold/application restrictions.
Takeaways
Resin formulation, mass of mixed epoxy, mold insulation, room temperature, and surface area all affect heat buildup and cure behavior.
Do not choose a resin only because a search result says it is deep pour. Confirm the actual lift limit for the quantity and conditions you plan to use.
| Specification | What to record | Why depth alone is insufficient |
|---|---|---|
| Product/hardener | Exact names and ratio | Different systems can have different cure behavior |
| Maximum layer depth | Number, units and application | A coating limit is not a casting limit |
| Batch or casting volume | Published maximum and conditions | The same depth can contain very different total volumes |
| Ambient conditions | Specified temperature and other restrictions | A limit does not apply outside its stated conditions |
| Next lift/recoat | Window and required preparation | Multiple pours need a bonding plan |
PrimaLoc's published 1/8 in maximum layer equals 3.175 mm. Its instructions are evidence for that named product, not proof that any tabletop epoxy has the same maximum. If another product sheet gives a different limit, use that product's instructions. Do not infer the allowed depth from a kit's gallon size, the words deep pour on a search result, or another brand's specification.
A 12 × 12 × 1 in mold holds 144 in³ = 0.62 gal. A 72 × 30 × 1 in cavity holds 2,160 in³ = 9.35 gal. Both are one inch deep, yet the second contains fifteen times the volume. This arithmetic does not establish a safe temperature or batch size; it shows why the manufacturer's volume and application restrictions must accompany the depth limit. If no suitable limit is published, ask the manufacturer rather than assume permission.
Convert a verified maximum layer depth into a project schedule.
Record the product name, hardener, source URL, allowed volume and ambient conditions with the depth limit. If any of those conditions is missing, a general calculator cannot resolve it by project type. The calculator therefore continues to calculate total quantity while leaving the execution limit unconfirmed.
FAQ
No. Different formulations have different limits, and the safe limit can also depend on pour size and temperature.
No. Changing the mix ratio can ruin cure behavior and should not be used to force a deeper pour.
Stage layers when total depth exceeds the product's safe lift depth or when the pour volume creates heat risk.
Related Pages
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Reviewed · Calculation notes and corrections