DampRid makes passive moisture absorbers that cover up to 1,000 square feet for 60 days or 250 square feet for 6 months, operating without electricity or batteries. The brand is owned by W.M. Barr & Company and manufactures moisture-absorbing products for homes, storage areas, cabins, boats, cars, and RVs.
Skip them for small residential jobs where a couple box fans will do. DampRid products gain moisture rapidly initially but tend to level off, whereas competitors like Dri-It continue to absorb — something to consider for high-moisture environments.
What Montana Contractors Actually Use Them For
The 64 oz Hi-Capacity units handle basements, crawl spaces, storage units, and garages. That 1,000 square foot coverage claim works for moderately damp spaces. In seriously wet conditions — think spring snowmelt seeping into a basement — you’ll need multiple units or supplemental dehumidification.
Contractors appreciate them for water damage restoration and seasonal storage applications. The units last up to 6 months in cabins, boats, RVs, and campers, making them practical for Montana’s seasonal properties that sit empty through winter.
The real advantage is zero power requirement. Construction site storage containers, seasonal cabins without electricity, RV storage — anywhere you need moisture control but can’t plug in a dehumidifier. The Moisture-Lock Technology prevents spills even if the tub tips over, which matters when you’re placing them in unstable environments like boats or job site trailers.
Active Ingredients and Safety
| Component | Function |
|---|---|
| Calcium Chloride | Primary moisture absorber |
| Sodium Chloride | Secondary absorber |
| Potassium Chloride | Absorption enhancer |
The formula is septic safe and environmentally friendly. The desiccant crystals activate only when there’s excess moisture in the air, so they don’t overdry the space like some electric dehumidifiers can.
Product Lines That Matter
DampRid’s flagship moisture absorbers come in various formats including hanging bags for closets. The hanging bags work well in construction trailers and temporary office spaces where floor space is premium.
They also make Odor Genie, a solid gel with activated charcoal for areas under 300 square feet, and new Moisture Detection Strips to measure humidity levels. Those detection strips help determine if you actually need moisture control or if the musty smell has another source.
The refillable 10.5 oz units and 64 oz Hi-Capacity versions offer different coverage options. Contractor pricing varies by volume.
Frequently Asked Questions
How long do DampRid products really last? The 64 oz Hi-Capacity units last up to 60 days in spaces up to 1,000 square feet, or up to 6 months in smaller 250 square foot areas. Users report them lasting longer than the advertised 60 days in moderate humidity conditions.
What spaces work best for DampRid? Basements, crawl spaces, storage units, garages, laundry rooms, utility areas, RVs, boats, campers, and seasonal cabins. Any enclosed space prone to excess humidity where you can’t run electric dehumidification.
Are they safe around job sites? The all-natural formula is nontoxic and septic safe. The Moisture-Lock Technology prevents spills if containers tip.
How do they compare to electric dehumidifiers? They work effectively for moderate to high humidity but may require supplementary measures in extremely damp conditions. No operating cost, no noise, no power requirement. Trade-off is lower moisture removal capacity than powered units.
Can you reuse or refill them? The 10.5 oz containers are refillable. Larger refill bags feature secure screw-top lids for easy pouring into smaller units. Once crystals fully dissolve into liquid, dispose of according to local regulations.
Ready to Get Started?
Our building materials specialists can help you find the right DampRid products for your project.
