Eva-Dry E-500 Renewable Silica Gel Dehumidifier, 2-Pack, No Batteries

Price: $56.46
(as of Oct 11, 2026 14:41:43 UTC – Details)

Product description

The video showcases the product in use.The video guides you through product setup.The video compares multiple products.The video shows the product being unpacked. Maximize Comfort with the E-500 2-Pack

Which Eva-Dry Compact Renewable Dehumidifier is Right for You?

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Customer Reviews

4.4 out of 5 stars 683

4.1 out of 5 stars 90

4.2 out of 5 stars 35,471

4.2 out of 5 stars 173

Price

$56.46$56.46

$28.95$28.95

$14.97$14.97

$123.99$123.99

Size

8″L x 2.5″W x 6.5″ H

7″L x 2″W x 4.25″H

6.2″L x 1.25″W x 4.7″H

8″L x 2.5″W x 6.5″ H

Effective Area

500 cubic feet each

250 cubic feet

333 cubic feet

500 cubic feet each

Renewal cycle time

Approx. 16-18 hours

Approx. 12-18 hours

Approx. 12-14 hours

Approx. 16-18 hours

Absorption capacity

6-8 oz. each

4-6 oz.

4-6 oz.

6-8 oz. each

Plug-in to renew

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✔

✔

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Can it effectively reduce humidity in larger spaces?

The E-500 covers up to 500 cubic feet (63 sq ft) per unit. For larger spaces, we recommend the Eva-Dry EDV-2400, which covers up to 2,400 cubic feet with a built-in humidistat.

Why do the indicator beads turn black or fail to change color?

This is caused by exceeding the 16–18 hour renewal cycle. Over-charging permanently breaks down the indicator dye. The silica gel inside remains effective but the color indicator may no longer be reliable. Always set a timer when renewing.

Is it normal for the unit to become very hot during renewal?

Yes — the internal heating element gets warm to hot during renewal. This is normal. Plug into a power strip, not directly into a wall outlet. Place on a heat-resistant surface in a well-ventilated area for the full 16–18 hour cycle.

What should I do if beads don’t change after renewal?

Unplug and cool to room temperature. Shake gently to redistribute the beads, then run a second full renewal cycle. Do not leave unit plugged in beyond recommended cycle time.

Does cold weather affect performance?

The E-500 works in cold or dry climates, renewal cycles may take longer as less moisture is available in the air. Allow a full 18-hour renewal cycle before redeploying in cold environments.

RECHARGEABLE GUN SAFE MOISTURE ABSORBERS: This renewable silica gel dehumidifier is perfect for gun safes, closets, boat cabins, RVs, and small enclosed spaces up to 500 cubic feet per unit. Operates cordlessly during use — no batteries, no power cord. When the indicator turns green, plug into a power strip for 16–18 hours to renew, then redeploy. Protects firearms, valuables, and belongings from rust, corrosion, and moisture damage.
LESS WASTE | LASTS UP TO 10 YEARS: The E-500 is a renewable dehumidifier that lasts up to 10 years with no refill costs ever — saving $10–20 per year compared to disposable moisture absorbers. Eco-friendly, non-toxic silica gel absorbs moisture without chemicals or calcium chloride. One purchase, a decade of protection.
CORDLESS DURING USE — PLUG-IN TO RENEW: Operates silently without batteries or cords while dehumidifying. When the color indicator turns from orange to green, plug into a power strip — do not plug directly into a wall outlet, as the unit’s weight can cause it to fall. Place on a hard, heat-resistant surface in a well-ventilated area for 16–18 hours. Do not exceed the recommended renewal time — over-charging can permanently discolor the indicator beads. Set a timer.
RENEWAL — WHAT TO EXPECT: The unit will become warm to hot during the renewal cycle — this is normal. In cold or dry climates, renewal cycles may take longer as less moisture is available in the air. If beads remain green after a full cycle, unplug, cool to room temperature, shake gently, and run a second renewal cycle. Contact Eva-Dry support if the issue persists.
2-PACK VALUE — COVER TWO SPACES SIMULTANEOUSLY: Each unit operates independently, covering up to 500 cubic feet. Use one in your gun safe and one in a closet, or place them in any two small enclosed spaces that need simultaneous protection. Includes two twist-lock closet hangers — no shelf space required. Color-change indicator (orange = dry and ready, green = full and needs renewal) tells you exactly when to recharge each unit.
Customers find the dehumidifier effective, particularly for gun safes, with one customer noting it can bring humidity levels down to around 10-15%. The rechargeability and moisture removal features receive mixed feedback – while some find it easy to recharge and extract moisture, others report units that won’t recharge or show no decrease in humidity. Durability is also mixed, with some units lasting a good amount of time while others don’t last. The indicator feature receives negative feedback as the beads stay green/black and never change color. Value for money opinions are divided between those who find it worth the money and those who consider it not worth the cost.