CRL 1/4" x 1-1/8" x 4" Silicone Rubber Setting Blocks Cleaning Supplies CRL M66 conforms to and

CRL M66 conforms to and passes: Federal Specification TT-S-00230C

Effortless Dispensing of High Viscosity Sealants

All CRL Silicone Sealant cartridges are packed with innovative Screw-On Nozzles

CRL Closed Cell Backer Rod is a round

Maximum joint dimension is 1/2" x 1/2" (13 x 13 mm)

CRL 1/4" x 1-1/8" x 4" Silicone Rubber Setting Blocks Cleaning Supplies CRL M66 conforms to 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.