DESCRIPTION
The Norseal 4030 is a medium density closed cell PVC foam sealant with “swirl-free” capability. It was specially created to work with mechanical fasteners. The unique foam resists distortion from drilling, riveting and other fastening operations, making it ideal for metal to metal joints. To create an adequate seal, the foam must be compressed a minimum of 30% in the final joint. Once in place, the foam will be able to handle normal joint movement due to thermal expansion or environmental forces. The acrylic adhesive used on the Norseal product line is a pressure sensitive adhesive and therefore must be applied to clean, dry surfaces.