sil-p ad 400 sil-pad 400 is the original sil-pad material. sil-pad 400 is a composite of silicone rubber and ?berglass. it is ?ame retardant and is specially formulated for use as a thermally conductive insulator . primary use is to electrically isolate power sources from heat sinks. sil-pad 400 has excellent mechanical and physical characteristics. surfaces are pliable and allow complete surface contact with excellent heat dissipation. sil-pad 400 actually improves its thermal resistance with age. the reinforcing ?berglass gives excellent cut-through resistance and sil-pad 400 is non-toxic and resists damage from cleaning agents. sil-p ad 600 sil-pad 600 is a silicone elastomer ? lled with special ingredients to provide higher thermal performance. this material has similar physical characteristics of the sil-pad 400 material with enhanced thermal performance. special thicknesses, rolls and sheets sil-pad 400 can be supplied on special order in a variety of thicknesses from .007 to .045 inches to ful? ll special requirements of insulation path minimums or other spacing needs. sil-pad 400 and 600 are available in die-cut parts, sheets (6" x 6" min., 6" x 12", 8" x 8", 10" x 10" and 12" x 12") and roll form. s il -p ad 400 ? the original fiberglass based sil-pad physical properties sil-pad 400, .007 in. sil-pad 400, .009 in sil-pad 600 test method color gray gray green thickness inches .007 .001" .009 .001" .009 .001" (mm) 0.178 0.025 .229 .025 .229 .025 astm d 374 breaking strength lbs/inch (kn/m) 100 (18) 100 (18) 100 (18) astm d 1458 elongation, % 45 to warp and ? ll 40 40 40 astm d 412 hardness, shore a 85 85 85 astm d 2240 tensile strength, kpsi (mpa) 45 to warp and ? ll 3 (20) 3 (20) astm d 412 continuous use temp., c -60 to +180 -60 to +180 -60 to +180 speci? c gravity 2.0 2.0 1.8 astm d 792 construction silicone/fiberglass silicone/ fiberglass thermal vacuum weight loss % (tml) as manufactured .40 .40 nasa post cure 24 hrs. 400 f .25 .25 sp-r-0022a volatile condensable material % (cvcm) as manufactured .11 .11 nasa post cure 24 hrs. 400 f .07 .07 sp-r-0022a thermal properties sil-pad 400, .007 in. sil-pad 400, .009 in sil-pad 600 test method thermal resistance, c-in 2 /w 0.45 0.50 0.35 astm d 5470 thermal conductivity, w/m-k 0.9 0.9 1.0 astm d 5470 electrical properties sil-pad 400, .007 in. sil-pad 400, .009 in sil-pad 600 test method breakdown voltage, volts a-c min. 3500 4500 4500 astm d 149 dielectric constant, 1000 cps (hz) 5.5 5.5 5.0 astm d 150 volume resistivity, ohm metre 1.0 x 10 11 1.0 x 10 11 1.0 x 10 11 astm d 257 25
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