1.1 This test method describes the determination of the tack-free time property of caulking compounds and sealants. This test method is applicable to both gun and knife grades. 1.2 The values stated in inch-pound units a This test method describes the determination of the tack-free time property of caulking compounds and sealants. The method is applicable to both gun and knife grades. Requirements for the apparatus including the cabinet or room, brass sheet, template,