Quick Answer

Moisture Muncher capsules are a simple, effective way to stop fog inside your underwater housing. Drop one capsule into the housing before sealing—the crystals inside absorb moisture, preventing condensation on the lens and corrosion of electronics.

Why Fog Forms in Your Housing

Fog happens when warm, humid air inside the housing hits a cooler lens or viewport. Even a tiny amount of trapped moisture—from your breath, a damp O-ring, or humidity in the room—can condense into droplets that ruin your shot. The same moisture also accelerates corrosion of metal contacts and encourages mildew growth on seals.

A desiccant like Moisture Muncher capsules pulls that excess humidity out of the air before it has a chance to condense. Unlike silica gel packets that can leak or lose effectiveness quickly, these capsules use powerful crystals that lock away moisture for the duration of your dive.

Where to Place the Capsule

Moisture Muncher capsules are designed to fit inside SeaLife camera and smartphone housings, and they also work with other brands. Place one capsule in a corner of the housing where it won't block buttons or the lens. For larger housings or very humid conditions, you can use two capsules for extra protection.

The capsule itself is sealed but breathable—moisture passes through the casing and gets trapped by the crystals inside. There's no risk of loose gel touching your camera or lens.

Diagnosis: Is Moisture the Problem?

  • Symptom: You see fog or condensation on the inside of the housing lens or viewfinder within minutes of entering the water. This is almost always caused by excess humidity inside the sealed housing.
  • Likely Cause: Moisture trapped during assembly—from breath, damp O-rings, or humid air. Even a small amount of water vapor can condense when the housing cools in the water. A desiccant like Moisture Muncher absorbs that vapor before it condenses.
  • Corrective Action: Place one Moisture Muncher capsule inside the housing before sealing. For extra humid conditions or longer dives, use two capsules. Ensure the O-ring is clean and dry. If fog still appears after using a fresh capsule, check for a leaking O-ring or housing crack—stop diving and inspect the seal.

Product Facts

  • Moisture Muncher Capsules – Orange: Eats humidity, kills moisture. Maximum protection against corrosion, fogging and mildew. Moisture Muncher capsules fit into SeaLife underwater camera and smartphone housings as well as other brands of underwater camera housings. The powerful crystals in each capsule absorb moisture to prevent fogging and corrosion of your valuable electronics and cameras. Use inside an airtight storage case or container to create a… This capsule is a low-cost insurance policy—one capsule inside your housing or storage case keeps the interior dry, so you never miss a shot due to fog.
  • Moisture Muncher Capsules – Blue: Eats humidity, kills moisture. Maximum protection against corrosion, fogging and mildew. Moisture Muncher capsules fit perfectly into SeaLife underwater camera and smartphone housings as well as other brands of underwater camera housings. The powerful crystals in each capsule absorb moisture to prevent fogging and corrosion of your valuable electronics and cameras. Use inside an airtight storage case or container to… The blue capsule offers the same moisture-absorbing power with a slightly different price point—choose based on your budget or preference for color-coded gear.