silicone putty

Most listings describe silicone-based materials—examples include durable silicone and silicone rubber—and many products explicitly list "Material: Silicone."

Most putty toys and packs are labeled for ages 3 years and up.

Listings highlight tactile effects such as squishy or sponge-like textures, popping/crackling sounds, heat-activated color changes, and stretch/snap/bounce play properties.

They are described as waterproof, moisture-proof, temperature-resistant, and suitable for interior and exterior household sealing and repairs.

Quantities vary across products. Examples from listings include 2.8 ounces, 2.5 ounces, 3.2 ounces, 2.1 ounces, 60 grams, 1.58 fl oz (US), and 0.33 pounds.

Descriptions list uses such as sealing showers, kitchens, bathrooms and sinks; filling gaps around doors and windows; quick household repairs; and small aquariums.