Material that causes problems
Platinum cure silicone can be inhibited (prevented from curing) if it comes in contact with certain materials.
For proper cure, avoid the following materials:
TIN CONTAINING COMPOUNDS
Condensation cure silicones
SULFUR CONTAINING COMPOUNDS
Latex gloves or tubing
Wood
Natural Rubber
PVC (plasticized)
Neoprene rubber
NITROGEN CONTAINING COMPOUNDS
Epoxy/amine cure materials
Other materials which have been found to inhibit the cure of
two-compound addition cure silicones:
- Dow Corning 630 protective coating
- Dow Corning 3110,3111,3112,3116,and 3120 RTV silicone rubber cured with Dow Corning |
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- RTV catalysts S,F, or H; cured seven days at room temperature (Dow Corning 3110,3111,3112,3116, and 3120 RTV silicone
rubbers cured with Dow Corning RTV catalyst S,F, and H at temperature plus 4 hrs at 150°C do not inhibit cure.)
- Polysulfide MIL-S-8516
- Humiseal 1B-27 coating
- Mystik 6207 tape, Mystik 6215 tape
- Scotch cellophane tape, Scotch 360 tape
- Permacel masking tape
- Vinyl electric tape
- Pliobond adhesive
- Buna N rubber
- GRS rubber, Natural rubber
- Viton A rubber
- Acid core solder flux, Rosin core solder flux
- Some pigments and dyes
Sulfur Compounds:
- Thiols
- Sulfides
- Sulfates
- Sulfites
- Thioureas
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