Silicone Options for Thick, Adherent Texture

Based on your need for a silicone ingredient that provides a thick, viscous texture and good skin adherence for spot application on acne scars, without being too lightweight or slippery, here are a few options:

• Silicone Gel (Thick & Smooth, Cyclopentasiloxane Base): This is a pre-made opaque silicone gel with high viscosity. It's designed to improve texture, making it soft, smooth, and light, while being non-sticky and providing a matt look. Its high viscosity makes it suitable for creating a thicker feel and good adherence.
• Silicone Gel (Medium Matte, Dimethicone Base, High Viscosity): Similar to the above, this is also an opaque silicone gel with high viscosity, but based on Dimethicone. It provides a soft, smooth, non-sticky texture and a soft (matt) look, helping to adjust formula texture to be pleasant and light.

Both of these silicone gels are already in a high-viscosity form, making them suitable for direct use or easy incorporation into a simple base for spot treatment where you need a thicker, more adherent feel to help fill or blur the appearance of scars.

• Silicone Thick™ (provides viscosity in silicone): If you are formulating your own product and want to specifically increase the viscosity of a silicone base (like Cyclopentasiloxane), this white powder acts as a thickener or gelling agent for silicones. This gives you control over the final viscosity you want to achieve.

For your purpose of spot application on acne scars needing a thick, adherent feel, the pre-made silicone gels (Silicone Gel (Thick & Smooth) and Silicone Gel (Medium Matte)) are likely the most straightforward options due to their inherent high viscosity and texture-modifying properties.