Lab-Putty/Lab-Putty Hard Activator is used with Lab-Putty brand elastomeric putty, a polysiloxane laboratory modeling material with 62 67 Shore A. Its indications include: matrix for the formation of general occlusion and functional patterns, model repairs, soldering, isolation/denture heat protections, hard palate relief stamp, keys for the gingival mask, block outs, matrix to build partial or full dentures and relinings.