C.R. LAURENCE 22AL CRL Aluminum Silicone Sealant 3 Fluid Ounce Squeeze Tube. CRL professional quality Silicone Sealant is available for small jobs or over-the-counter retail sales. It has the same professional acetic cure formula as our 33S Silicone, and it meets the same exacting standards and specifications, so it is a proven product you can use or sell with complete confidence. The tubes are blister carded in an attractive retail package that includes a screw-on tapered nozzle.. Part Numbers Variations: 22AL