1. Santoprene® Thermoplastic Rubber For Commercial Glazing Seals

2. 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

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

4. 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.

5. 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

6. 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.

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

8. 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

9. 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

10. 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

11. 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)

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