Closed cell spray foam is a rigid higher density (~2.0 lbs./board ft) insulation product that is typical used for speciality applications. These speciality applications include high humidity applications (e.g. indoor pools, hot-tubs, saunas) and low clearance cathederal ceiling applications.
The closed cell spray foam has a higher R-value per inch (~7/inch), but also costs about twice as much as the open-cell spray foam. More information is provided below: | Demelic Heatlok Brochure - is our current closed-cell spray foam product. A brochure is available for download. |  | | Demelic Heatlok Specification - is our current closed-cell spray foam product. A complete specification is available for download. | 
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