K-Flex 620 Contact Adhesive is a fast drying, black-colored neoprene contact adhesive that is ideal for bonding porous or non-porous material. This adhesive is a thicker consistency, non-runny and can be applied with a brush or a roller. K-Flex 620 Contact Adhesive is a reliable way to join seams and butt joints of elastomeric pipe and sheet insulation. For more information, please consult our technical data sheet. K-Flex 620 Contact Adhesive higher solids content allows for it to be brushed or roller-applied easily without running. They are ideal for bonding porous and non-porous materials, as they will not be absorbed easily.