Reiss Manufacturing. of Blackstone, VA specializes in formulating silicone compounds and molding, extruding, and calendering silicone and related polymer products. Reiss Manufacturing. of Blackstone, VA specializes in formulating silicone compounds and molding, extruding, and calendering silicone and related polymer products. Job Description. JOB SUMMARY: The estimator provides customers with an estimated cost and lead-time to produce a manufactu...