Santoprene® Thermoplastic Rubber For Commercial Glazing Seals

Application Fit Commercial Successes Application Attribute of Santoprene Wedge closer extrusion tolerances lower coefficient of friction excellent sealing performance (compressive stress relaxation) Preset coextrusion more intricate designs excellent sealing perfomance (compressive stress relaxation) Setting Block reduce material weight low compression set Dynamic Seal coextrusion excellent sealing performance (low compression set) excellent flex fatigue Thermal Break coextrusion low thermal conductivity

Friction Characteristics Against Aluminum, Room Temperature Material Kinetic Static Santoprene 201-73W175 1.32 0.97 PVC (flexible) 0.66 0.80 EPDM 4.38 4.38 Polychloroprene 4.04 4.04 ASTM D 1894

Santoprene Weathering Performance vs. Competition Hardness Change Santoprene has less change in hardness than Neoprene or EPDM. Profiles that increase in hardness will no longer exert the proper force on the glass to maintain the seal.

Santoprene Weathering Performance vs. Competition Color Change Santoprene exhibits less color change than Neoprene or EPDM. The human eye can detect changes great than 2 Delta E

Santoprene Heat Aging Performance vs. Competition 70 hrs at 100 C Santoprene performs better than Neoprene and EPDM with prolonged exposure to heat. South and west facing walls experience intense heat build-up on a daily basis.

Cold Temperature Characteristics Brittle Point Material °C °F Santoprene 201-64W175 -60 -76 EPDM -40 -40 Polychloroprene -43 -45 PVC (flexible) -42 -44 ASTM D 746

Compression Set Compression set measures a change in thickness after a force is removed. It is a rough estimate of a material's sealing capability. T1 = initial thickness of block T2 = compressed thickness T3 = thickness after release of force

Compressive Stress Relaxation In glazing seal applications the seal must continue to exert force against the glass and aluminum to be effective. Compressive relaxation is a measure of the force the material exerts over a specified time period. F1 = force originally required to compress the block by a specified amount F2 = force required to compress block same amount after a defined time period

Long Term Compressive Stress Relaxation This illustrates the predictable behavior of Santoprene in long term compressive stress relaxation. EPDM starts out better but at 48 hours the force starts to deteriorate at a faster rate. By 724 hours (about 1 month) the force retention of the EPDM has dropped below Santoprene. EPDM and Santoprene exhibit similar behavior in long term compression set. EPDM Santoprene 10 100 1,000 10,000

Silicone Sealant Compatibility Santoprene has point contact compatibility approval from Dow Corning and G.E. Silicones This means it is suitable for 4-sided dry and 2-sided wet/dry constructions Santoprene is not suitable for 4-sided wet constructions (structural)

Chemical Resistance See Fluid Resistance Guide for Infomation on other chemicals Note: One week at 100°C, except for H2SO4 at 23°C