Microclimate/Gel Products

Rhapid Silica Gel |  Savengel Pollutant Control Sheet |  MarvelSeal Barrier Film

OUT OF STOCK RHapid Silica Gel OUT OF STOCK [ order ]

Silica gel has been used in museums throughout the world for decades to stabilize the 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 developed RHapid GEL specifically for museum applications. Its unique properties give it the greatest capacity to adsorb and desorb moisture within the standard relative humidity range for artifacts in museums. RHapid GEL is the most cost-effective humidity buffering products available because less of our gel is required per cubic foot then other manufactures. The flexible, moisture-permeable packaging of the sachets allows for a simple, clean installation by museum staff.

A RHapid 6PAK is MarvelSeal® bag, which contains six, ½ pound, moisture permeable sachets of our RHapid GEL for a total of three pounds worth of gel per 6PAK. Each RHapid GEL sachet measures 4 x 6 inches and is about 1 inch high.

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). That is, more silica gel is required in long-term exhibition cases to provide a stable buffering environment.

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

If you require more than 5 six packs of conditioned silica gel, please contact us at least a week before you need it. For especially large orders (10 six packs or more) or orders with large amounts of silica gel at different condition points please note that it may take extra time to fulfill your order.

Cat #	Description	Price
4152	RHapid 6PAK silica gel - dry 6 pack - total 3 lb	$35
	Conditioned Gel
41730	RHapid 6PAK silica gel - conditioned 30% RH	$50
41740	RHapid 6PAK silica gel - conditioned 40% RH	$50
41745	RHapid 6PAK silica gel - conditioned 45% RH	$50
41750	RHapid 6PAK silica gel - conditioned 50% RH	$50
41760	RHapid 6PAK silica gel - conditioned 60% RH	$50

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Out of Stock Savengel Pollutant Control Sheet [ order ] Out of Stock

Art Preservation Services developed High Capacity Scavengel for the passive control of gaseous pollutants in museum exhibition and storage cases. Due to its unique composition and design, it is very effective in removing large amounts of many common indoor pollutants over a short period of time.

Our High Capacity Scavengel consists of two types of pollution scavengers, embedded within a 2 mm (1/16 inch) thick porous polyester sheet. We recommend using one square foot of Scavengel for 5-10 cubic feet of case volume.

The active media consists of a mix (50:50 by volume) of:

• activated alumina impregnated with 8% potassium permanganate
• activated carbon granular media

In part, the effectiveness of Scavengel is based on the combination of two types of media. Potassium permanganate, a strong oxidizing chemical, breaks down pollutants whereas activated carbon adsorbs pollutants within its enormous network of internal capillaries. The combination of a chemisorption and physical adsorption process is the key to the material's broad-spectrum capacity to remove a very wide range of pollutants.

Effectiveness is further improved by the rate at which it adsorbs pollutants in a passive application. Because each small grain of media floats within Scavengel's porous polyester matrix, there is an enormous surface area available, permitting a rapid response between the material and the pollutant.

Please continue to check on our website for the most current information on our new pollution removal media and best methods of application.

Cat #	Description	Price
4440	Scavengel pollutant control sheet Minimum order 1 yard Sold in 1 yard increments	$60/yard 22" width

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Out of Stock MarvelSeal ® Barrier Film [ order ] Out of Stock

MarvelSeal® is a thin and flexible moisture barrier film, made from a sandwich of polyethylene, aluminum, and polyester. The very thin aluminum film serves as a barrier that will resist the transmission of water vapor and other atmospheric gases. It has a high tear resistance, but can be cut with scissors to any shape or size. Most commonly used as a liner to isolate unstable case construction materials, MarvelSeal® is also used to seal shipping crates, storage units, exhibit cases, or as barrier bags.

Cat #	Description	Price
4421	MarvelSeal ® barrier film 25 yards	$125 36" width
4422	MarvelSeal ® barrier film 50 yards	$200 36" width

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