Custom setting blocks level, protect, and seal the insulated glass in commercial windows. They also provide stress relief since window materials expand and contract with changes in temperature. Custom setting blocks are relatively simple, but they help to keep glass from breaking and maintain the integrity of the glazing bead.
Glazing Seals for the Commercial Window Market
Vip Rubber and Plastic of La Habra, California (USA) makes custom setting blocks for commercial window manufacturers; however, we do not keep these products in stock for consumer sales. Minimum order quantities apply, and we do not sell small volumes. Lead times vary, so contact us to discuss your window application.
Custom Setting Block Materials
Custom setting blocks are made from materials that won’t migrate with the insulated glass or RTV sealant. Choices include PVC, EPDM, silicone, and neoprene with an 80-durometer hardness. Compatibility with the insulated glass unit and application environment is important, to talk to Vip for assistance.
PVC Setting Blocks for Commercial Windows
Some PVC custom setting blocks are made of polyvinyl chloride (PVC), a low-cost material that is both weather-resistant and long-lasting. PVC is a thermoplastic, and the Vip website groups cutting setting blocks with other types of plastic extrusion profiles.
EPDM vs. Silicone vs. Neoprene for Window Sealing
EPDM, silicone, and neoprene setting blocks are all made of elastomers. EPDM has outstanding weathering properties, including excellent sunlight resistance. Silicone withstands a wide range of temperatures and chemicals. Neoprene is strong, lightweight, and resistant to flexing and twisting.
Installing Custom Setting Blocks
Clear plastic setting blocks are aesthetically-pleasing, but it’s important to consider all of your application requirements during product selection. For example, you might need a custom setting block with an adhesive to help speed installation. Larger commercial windows require more custom setting blocks, and product dimensions are a function of the length, width, and height of the insulated glass.