Microclimate/Gel Products

Silica gel has been used in museums throughout the world for decades to stabilize relative humidity (RH) in sealed exhibition cases and storage units. It provides environmental protection to museum collections by acting as a buffer against relative humidity changes.

APS pioneered the use of high-performance silica gel specifically for museum applications.  Unlike regular density silica gel, a high-performance silica gel has the capability to efficiently maintain a relative humidity condition at or above 45% RH because of its high buffering capacity in the upper RH range.

RHapid Gel was developed by APS to provide a high buffering capacity over a wide relative humidity range (30-65% RH). Within this range, RHapid Gel is the most cost-effective humidity buffering product available.

A RHapid Gel 4PAK is a MarvelSeal® bag, which contains 4individual 300g (0.66 lbs) moisture-permeable sachets of RHapid Gel. Each RHapid Gel sachet measures 7 x 4 x 0.85 inches. The flexible, moisture-permeable packaging of the sachets allows for a simple, clean installation by museum staff.

Based upon standard museum recommendations, one RHapid Gel sachet will condition 2 to 4 cubic feet of case volume (2 cubic feet for permanent exhibits, and 4 cubic feet for temporary applications). This takes into account that more silica gel is required to provide a stable buffering environment for long-term exhibitions.

Please download the article Demystifying Silica Gel for a comprehensive overview on silica gel for museum applications.

If you require more than five 4Paks of conditioned silica gel, please contact us at least a week before you need it. For especially large orders (ten 4Paks or more), please note that it may take extra time to fulfill your order.

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