The Army Painter Hydro Pack Refills are the official replacement consumables for the Army Painter Wet Palette — the hydration paper sheets and foam pads that keep acrylic paints workable session after session. At $14.31, they represent one of the most practical purchases a miniature painter can make: when your original sheets wear out, you do not need to buy a new palette. You restock the parts that get used up, and your palette performs exactly as it did on the first day.
Every miniature painter who uses a miniature painting wet palette knows the moment when something shifts — the paper surface starts to feel slightly rough, paint pools in unexpected spots, and blending that used to feel effortless suddenly requires more effort and more water. That moment is almost always the paper telling you it is time for a fresh sheet. The Army Painter Hydro Pack Refills are the answer to that problem: a clean, properly formulated replacement that brings the palette back to full performance without the cost or inconvenience of starting over with a new unit.
This review covers everything you need to know before buying — what is included, when to replace your consumables, how long the refills last, and how they compare to third-party alternatives.
Army Painter Hydro Pack Refills — Full Review
The Hydro Pack is part of The Army Painter’s official accessory ecosystem for their wet palette system. It is a direct-replacement product — designed to match the dimensions of the Army Painter Wet Palette case exactly and to replicate the hydration behavior of the original consumables that ship with the palette.
The product addresses a straightforward reality of wet palette ownership: the palette case, airtight lid, and brush holder are durable components that can last for years. The paper sheets and foam pads are consumables with a finite lifespan. The Hydro Pack exists so that painters do not have to replace the entire unit when only the expendable parts have worn out.
What’s in the Box
The Army Painter Hydro Pack Refills come with two types of consumables that cover both components of the wet palette system:
- 50 hydration paper sheets
- 2 foam pads
The sheet count mirrors what ships with the original palette, giving you a complete starting supply. This matters for painters who are establishing a refill rhythm — one Hydro Pack is a meaningful supply for regular hobby use, not just a stopgap. The two foam pads are included as a convenience, since foam degradation happens more slowly than paper wear but does eventually require replacement.
Why Wet Palette Consumables Wear Out — And Why It Matters
A miniature painting wet palette works because of the interaction between three elements: moisture in the foam, controlled transfer through the paper, and the paint resting on top. Each component plays a specific role, and the system only performs well when all three are in good condition.
The hydration paper is the element that degrades most visibly. Over repeated sessions, acrylic pigments penetrate the paper surface and dry within the fiber structure. Washing the sheet removes surface paint but not the deep-set staining. As this buildup accumulates, the paper becomes progressively less uniform — certain areas allow too much moisture through while others block it, creating an inconsistent working surface where paint behaves unpredictably.
The foam degrades more slowly but in a related way. Over time, extended use and repeated drying and rehydration cycles can reduce the foam’s water-retention capacity. A foam that once held moisture evenly across its full surface may develop dry patches at the edges or corners, which then creates cold spots on the paper above where paint dries faster than it should.
For painters working on smooth blends, glazing, or wet blending techniques, this inconsistency shows up directly in the quality of the final miniature. Replacing the army painter wet palette paper and foam at the right time is the simplest maintenance action available — and the Hydro Pack makes it easy.
How to Know When to Replace Your Wet Palette Consumables
Knowing when to swap out the paper and foam is more important than how often — replacing too early wastes supplies, and waiting too long degrades the painting experience without a clear cause. Here are the concrete signs to watch for:
Replace the paper when: The sheet is heavily stained and no longer rinses clean with water. The surface feels slightly rough or uneven to the touch compared to a fresh sheet. Paint begins to pool in specific areas despite the foam being correctly saturated. Blends that previously felt smooth require noticeably more effort to maintain.
Replace the foam when: The pad develops persistent dry patches that do not rehydrate even after thorough soaking. The foam surface feels uneven or has developed depression spots. The foam changes color significantly from its original appearance despite cleaning. Water no longer distributes evenly across the full surface of the pad.
In practice, most painters find that a paper sheet lasts two to five sessions depending on how long and how intensively they paint. The foam pads typically outlast multiple full packs of paper — making the two foam pads included in the Hydro Pack more than sufficient for the lifespan of the accompanying 50 sheets.
Compatibility — Which Palettes Work with the Army Painter Hydro Pack?
The Army Painter Hydro Pack Refills are sized specifically for the Army Painter Wet Palette and fit the case without any trimming or modification. This is the guaranteed-compatible combination — the paper dimensions, foam thickness, and moisture transfer rate are all calibrated to work together within that specific palette case.
Some painters use the sheets in other wet palettes by trimming them to size. The paper holds well after cutting and maintains its hydration properties, but Army Painter does not certify compatibility with third-party palettes or guarantee performance outside their own system.
If you use a Redgrass Games palette, the Redgrass Hydration Paper is the correct refill option — it is formulated specifically for the Redgrass foam and the moisture dynamics of their palette cases. Cross-brand paper can work in practice but will not deliver the same consistent results as the matching system.
For a broader discussion of wet palette options, the miniature painting community at r/minipainting regularly compares first-party and third-party refill solutions — a useful resource for painters who want real-world feedback beyond manufacturer specifications.
How to Replace the Army Painter Wet Palette Consumables
The replacement process takes under two minutes once you are familiar with it. The steps below cover both a paper-only refresh and a full foam-and-paper replacement.
Paper-only refresh: Remove the old sheet from the palette and discard it. Check the foam surface — if it is still evenly saturated with no dry patches, leave it in place. Place a fresh sheet from the Hydro Pack on top of the foam and press gently from the center outward to seat it flat. Allow the sheet to rest for 30 to 60 seconds. The paper will absorb moisture from the foam below and flatten completely. It is ready to use once it lies flat and appears slightly translucent from the moisture.
Full replacement (foam and paper): Remove the old sheet and the old foam pad. Clean the palette case with a damp cloth if any dried paint has accumulated on the interior walls. Place a new foam pad from the Hydro Pack into the base of the case. Begin adding distilled water — the high-retention foam absorbs a significant volume before reaching saturation, so add slowly and check the surface frequently. The target is a fully saturated foam where no standing water pools above the surface.
Once the foam is saturated, place a fresh sheet on top and seat it from center to edges. Wait 30 to 60 seconds before painting. The paper will absorb moisture from the new foam and settle into the flat, stable working position that makes the Army Painter system perform well.
After the session, close the palette lid. The airtight seal keeps your paints workable for the next session without any additional preparation. A sheet that is not heavily stained can go back into service — simply re-open the palette, check the moisture level, and add a few drops of water to the foam edge if needed before continuing.
How Long Do Army Painter Hydro Pack Refills Last?
The honest answer depends on two variables: how often you paint and how you manage sheets between sessions. With 50 sheets per pack, here is a realistic breakdown:
- Casual painters (1–2 sessions per week, 1–2 hours each): One pack lasts approximately 10–12 months. Each sheet can cover three to four sessions before replacement.
- Regular painters (3–4 sessions per week, 2–3 hours each): One pack lasts approximately 4–6 months. Sheets may need replacing every two to three sessions.
- Heavy painters (daily sessions, long durations): One pack lasts 2–3 months. Sheets may need replacing after every session at high intensity.
The foam pads are a separate calculation. With proper maintenance — rinsing periodically and allowing the foam to dry fully between deep cleans — each foam pad remains functional through many paper cycles. The two foam pads in the Hydro Pack are typically more than enough to cover the life of the 50 included sheets for most painters.
Best Practices for Extending Consumable Life
The right maintenance habits extend the useful life of both the paper sheets and the foam pads significantly, reducing how often you need to reach for the refill pack.
Use distilled water: Tap water contains minerals that deposit in the foam over time, gradually reducing its water-retention capacity and creating a surface residue that accelerates paper degradation. Distilled water eliminates this entirely and is inexpensive at most grocery stores.
Do not over-saturate the foam: Standing water above the foam surface dilutes paint on contact and accelerates paper degradation. The correct saturation level is a foam that feels fully moist and firm but does not release water when pressed lightly. Adding water slowly and checking frequently prevents over-saturation from becoming a habit.
Close the lid between sessions: Even short breaks during a painting session benefit from a closed lid. The airtight seal on the Army Painter palette is one of its strongest features — use it to prevent unnecessary evaporation that forces the paper to work harder.
Rinse sheets between sessions when possible: A sheet with surface paint that has not yet dried deeply can be gently rinsed under cool water, dried flat, and reused for another session. This is most effective when done immediately after a session rather than hours later when paint has dried further into the fiber.
Store the foam dry when not in use for extended periods: If you are not planning to paint for more than a week, remove the foam, rinse it thoroughly, and allow it to dry completely before storing it in the palette case. Foam that sits saturated for extended periods without use is more susceptible to mold development, even with distilled water.
Army Painter Hydro Pack vs Redgrass Hydration Paper Refills
Painters who own both palette systems, or who are deciding which refill to purchase first, will find that both products serve the same function but are designed for different ecosystems. The key differences are worth understanding before buying.
| Feature | Army Painter Hydro Pack Refills | Redgrass Hydration Paper 50 Sheets |
|---|---|---|
| Price | $14.31 | $10.99 |
| Sheets included | 50 | 50 |
| Foam pads included | 2 | No |
| Designed for | Army Painter Wet Palette | Redgrass Games palettes |
| Paper formulation | Army Painter hydration paper | Proprietary Redgrass formula |
| Price per sheet | ~$0.29 | ~$0.22 |
| Foam pad cost included | Yes | No (sold separately) |
The Redgrass refill has a lower per-sheet price, but it covers only the paper — not the foam. For Army Painter palette owners, the Hydro Pack covers both consumables in one purchase and is guaranteed to fit the palette case dimensions. When you factor in the foam pad value included in the Hydro Pack, the price difference between the two products narrows considerably.
The Redgrass Games refill paper uses a proprietary formulation optimized for the moisture characteristics of their own foam system. Using it in an Army Painter palette will produce different results than using it with the Redgrass palette it was designed for. The same applies in reverse — Army Painter paper in a Redgrass palette may perform differently than expected. For each system, the first-party refill is the safest and most consistent choice.
Pros and Cons
Pros
- Official Army Painter replacement — guaranteed fit and compatibility
- Includes foam pads alongside paper, covering both consumables
- 50 sheets provides months of regular use for most painters
- Restores palette performance without purchasing a new unit
- Cost-effective at $14.31 for the full pack
- Consistent moisture transfer — same hydration behavior as original sheets
Cons
- Higher per-sheet cost than Redgrass refills
- Not officially compatible with other palette brands
- No option for larger sheet counts without buying multiple packs
Is the Army Painter Hydro Pack Worth It?
For any painter who already owns the Army Painter Wet Palette, the Hydro Pack is a straightforward purchase. The palette itself is the durable part of the system — the case, the lid, the brush holder. The paper and foam are the consumables, and at $14.31, restocking both is a small fraction of the cost of replacing the whole unit.
There is something genuinely satisfying about bringing a worn palette back to full performance with a fresh sheet and foam setup. The first stroke on clean, properly hydrated paper — paint moving smoothly, moisture balanced, blending behaving predictably — is a reminder of why the palette was worth buying in the first place. That restoration of experience is what the army painter hydro pack refills deliver, and at this price point, it is difficult to argue against stocking them.
The value case becomes even clearer when you consider that each sheet is reusable across multiple sessions. Painters who rinse sheets between uses and replace them based on actual degradation rather than a fixed schedule will find that a single Hydro Pack covers many months of consistent hobby time. The per-session cost is genuinely low — low enough that running out of paper should never be a reason to interrupt a painting project.
If you paint regularly and own the Army Painter Wet Palette, keep at least one Hydro Pack in your supplies at all times. The moment you reach for a fresh sheet and find none is precisely the wrong moment to have to stop and order more.
Common Mistakes When Using Wet Palette Refills
- Replacing the paper before it needs it — sheets can handle more sessions than many painters expect before performance drops meaningfully
- Using tap water instead of distilled water — mineral deposits accelerate foam degradation and leave residue on paper that reduces moisture uniformity
- Discarding the foam at the same time as the paper — foam lasts significantly longer and rarely needs replacing as frequently as the paper sheets
- Over-saturating the new foam — add water gradually, checking frequently; standing water above the foam surface is a sign of over-saturation
- Not waiting for the paper to flatten before painting — 30 to 60 seconds of rest after placing the sheet ensures a stable, even working surface
- Letting a paper sheet with surface paint dry completely between sessions — rinse it while the paint is still fresh and the sheet can often be used again
Frequently Asked Questions
What is included in the Army Painter Hydro Pack Refills?
The Army Painter Hydro Pack Refills include 50 hydration paper sheets and 2 foam pads. These are direct replacements for the consumable components of the Army Painter Wet Palette and fit the original palette case without any trimming or modification required.
Are Army Painter Hydro Pack Refills compatible with other wet palettes?
The sheets are sized for the Army Painter Wet Palette and may be trimmed to fit other palettes, but guaranteed performance applies only to the Army Painter system. For Redgrass Games palettes, Redgrass proprietary refill paper is the recommended option for best results.
How long do Army Painter Hydro Pack Refills last?
With 50 sheets per pack, the refills typically last several months for painters who hobby two to three times per week. Each sheet can be reused across multiple sessions until it becomes heavily stained or begins to degrade. The included foam pads have a significantly longer lifespan than the paper sheets.
How do you know when to replace wet palette paper?
Replace the hydration paper when it becomes heavily stained with dried paint that no longer rinses clean, when it wrinkles unevenly after saturation, or when paint pools in specific areas despite correct foam hydration. A degraded sheet will feel slightly rougher and less uniform than a fresh one.
Ready to restock your wet palette?
Check price on Amazon — $14.31The Army Painter Hydro Pack Refills are the lowest-friction way to keep your wet palette running at full capacity. One purchase covers both consumables — paper and foam — with enough supply to carry most painters through several months of consistent sessions. If you are using the Army Painter Wet Palette, this is the refill to keep in stock.
If you are still deciding between palette systems, our reviews of the Army Painter Wet Palette and the Redgrass Games Painter Lite cover both options in detail and help you find the right starting point for your painting setup.