CRL 1/2" x 1-1/8" x 4" Silicone Rubber Setting Blocks Self-Oiling Cutters they seal out air and

they seal out air and dirt to preserve the quality of the remainder of the sealant

USE ONLY WITH ADEQUATE VENTILATION

Excellent for Cleaning Glass Prior to Silvering

Riveted Rosewood Handle

CRL 1/2" x 1-1/8" x 4" Silicone Rubber Setting Blocks Self-Oiling Cutters they seal out air andCompatible with, and Will Not Discolor, Most Silicone Sealants Can Be Used for Food and Computer Related Applications 80 Durometer Hardness These CRL Silicone Rubber Setting Blocks have superior durability, are U. V. resistant, and are compatible with most silicone sealants. They will not discolor the silicone should the two come in contact with each other. Job specific testing prior to start up is recommended with each silicone sealant manufacturer.