Does it become hard once set? Wanting to use as a mother mold

It never sets - it remains soft and pliable. I would use hydrocal for the mother mold or reinforced fiberglass with epoxy.

Does this cure flexible or rigid?

This product does not cure at all. It remains pliable indefinitely

Does this putty maintain its shape once molded, like modeling clay, or does gravity cause it to melt back down?

Yes and it was very easy to work with. it did not stick to you hands and you could mold it very easy.

Wrap around outdoor speaker wire (binding post connection) for additional waterproofing? Want something removable for winter storage of speakers.

This is potentially messy for that application. Try using E/FUSING 112 to wrap wires to protect them from elements.

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900 Moldable Silicone Putty - Gray

Product ID: 139748118

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Details

Brand
E/FUSING
Specific Uses For Product
Repair
Material
Silicone
Item Form
Putty
Special Feature
moldable and

🔧Seals pinhole leaks instantly

🛠️2.65 oz precision weight

🇺🇸Made in USA quality

Description

🛠️ Seal leaks like a pro—because downtime is not an option!

COMPACT PORTABLE - Light 2.65 oz package fits in any toolbox
INSTANT LEAK REPAIR - Stops pinhole leaks on pipelines fast and reliably
PROUDLY MADE IN USA - Trusted quality and performance you can count on
PRECISION MOLDABILITY - Easily shape to fit any leak for a custom seal
REINFORCED DURABILITY - Use with E/Fusing 140 or 330 for extra strength

900 Moldable Silicone Putty is a 2.65-ounce, gray, US-made repair compound designed to quickly seal pinhole leaks in pipelines. It can be molded precisely to the leak area and reinforced with E/Fusing 140 or 330 wraps for enhanced durability, making it an essential tool for fast, reliable leak repairs.

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