Silent Dry INVISIBLE 5L Dehumidifier Stone 4 Pack

Silent Dry Invisible Dehumidifier Stone – Long-Lasting, Compact Moisture Control for Small Spaces

Protect your firearms, ammunition, optics, and other sensitive gear from moisture damage with the Silent Dry Invisible Dehumidifier Stone. Specially engineered for confined spaces up to 5 liters—such as pistol cases, ammo boxes, small safes, tool kits, or drawers—this compact yet powerful dehumidifier delivers silent, maintenance-free humidity control where you need it most.

Advanced Moisture Absorption Technology

At the core of this innovation is a patented nano-porous silica formula, made from natural silica sand and crafted through a biodegradable, eco-friendly process. This unique material is packed with millions of microscopic pores that actively draw in and trap moisture from the surrounding air. Each dehumidifier stone can absorb up to 9g ±10% of moisture per cycle (tested at 25°C, 85% RH), helping maintain humidity levels below 60% RH, which is ideal for preventing rust, corrosion, and mold.

Reusable and Renewable for 10+ Years

Unlike disposable desiccants, the Invisible Stone is completely reusable. When saturated, simply heat it in a microwave or conventional oven to release the absorbed moisture and restore its drying power. With proper care, each stone can be renewed over 100 times, providing up to 10 years of reliable service—saving money and reducing environmental impact over time.

Note: The stone is shipped in a pre-saturated (wet) state to preserve material integrity and must be heated before first use.

Slim, Compact, and Truly Invisible

Measuring just 5.2 × 3.3 × 2 cm and weighing only 30g, the dehumidifier stone is ultra-compact and designed to fit seamlessly into tight, concealed areas. Whether in a pistol case, optics box, or small equipment drawer, it works silently and invisibly without taking up valuable space or requiring electricity.

Certified Safe & Patented Worldwide

Manufactured in Taiwan, the Silent Dry Invisible Stone meets rigorous safety and environmental standards, including:

• EU REACH

• SGS

• US Prop 65

• FDA

It also holds patents in the U.S. (US10549258 B2), Japan (JP 6766096), Korea (KR 10-2040045), with applications pending in other major markets.

Versatile Use Across Confined Spaces

Originally designed for pistol and ammo cases, the Silent Dry Stone is also perfect for:

• Rifle cases

• Small or large gun safes

• Optics storage

• Jewellery drawers

• Tool boxes

• Camera cases

• Any sealed container up to 5L in volume

Key Features

• Ideal for confined 5L spaces (pistol case, ammo box, optics)

•  Patented nano-silica material for powerful moisture absorption

•  Reusable over 100 times – simply renew via microwave or oven

•  Environmentally friendly and cost-effective

•  Certified safe for various applications

•  Silent, cordless, and compact design

Protect your gear the smart, sustainable way. With Silent Dry, you get a powerful, invisible line of defense against moisture—without noise, waste, or hassle.