Smooth-On Sil-poxy 3oz Tube

Article number: 751635953109
Availability: In stock (16)

Sil-Poxy™ is a one-component adhesive made specifically for bonding Smooth-On RTV moldmaking silicone rubbers to silicone rubber and other substrates including some plastics (urethane), plasters/ceramics, fabrics, etc.

Sil-Poxy™ will work with tin- or platinum-cure silicones and provides a strong, flexible bond between silicone parts with high elongation. Can be colored with Silc-Pig™ silicone pigments. Cured adhesive resists weathering, moisture, UV and high temperatures.

Sil-Poxy™ can be used for repairing torn silicone rubber molds. Other applications include bonding of silicone for prosthetics and animatronics.  Cured Sil-Poxy™ is certified skin safe.  IMPORTANT - Do not apply to skin in liquid form.


  • Can be used repairing torn silicone rubber molds.
  • Will work with tin- or platinum-cure silicones
  • Provides a strong, flexible bond


Safety - Use in a properly ventilated area (“room size” ventilation). Wear safety glasses, long sleeves and rubber gloves to minimize contamination risk.

Store and use material at room temperature (73°F/23°C). This product has a limited shelf life and should be used as soon as possible.

A clean, dry surface is essential for successful adhesive bonding. If possible, abrade surface and follow with solvent wipe before applying.

Because no two applications are quite the same, a small test application to determine suitability for your project is recommended if performance of this material is in question.

Dispensing - Squeeze tube, taking care not allow air to enter tube before replacing cap. Unused product in tube exposed to air will cure quickly.

Applying - Apply adhesive to surface and mate parts. Material will begin to cure in 15 minutes. Pieces can be handled after 1 hour. Full cure is attained after 24 hours. Warmer temperatures (and higher humidity) will result in a faster cure. Lower temperature will retard cure.


Specific Gravity 1.12 g/cc
Cure Time 12 minutes
Color Translucent
Shore Hardness 40 A
Tensile Strength 750 psi
Elongation @ Break 750 %
Useful Temperature (min) -50 °F
Useful Temperature (max) 500 °F
Pot Life 5 minutes
Mixed Viscosity Light Paste
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