Pepetools - Precision Engineered Professional Equipment

Sand Casting Flask, 3.5", Aluminum 2 Piece Mold

Sand Casting Flask, 3.5", Aluminum 2 Piece Mold - Main image
$36.58 $59 In stock

The Pepetools Aluminum Sand Casting Flask is engineered for precision and durability in jewelry and small metal casting applications. Machined from solid aerospace-grade aluminum, this two-piece flask features a 3.5” internal opening, 3” depth, and a generous 1” pouring hole—ideal for casting silver, gold, bronze, and other non-ferrous metals.

A machined alignment pin ensures consistent registration between flask halves and also functions as a stabilizing support when pouring molds on your bench. The smooth interior finish aids in cleaner mold release and helps produce accurate results with each casting.

Key Features:

  • Precision-machined from aerospace-grade aluminum

  • 3.5” internal diameter and 3” depth—ideal for jewelry and small parts

  • Oversized 1” pour hole for easy and efficient metal flow

  • Built-in alignment pin for accurate flask alignment and improved stability

  • Corrosion-resistant, easy-to-clean finish

  • Proudly Made in USA

This flask is an essential tool for jewelers, metalsmiths, and small foundries looking for consistent results and professional-grade performance in sand casting.

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United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

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Customer Reviews (4.8 / 5 · 5 reviews)

Scarlett R. ★★★★★

Snug fit on my 3.5" flasks and the two halves line up flush every time, so I'm not chasing sand leaks around the seam anymore. Solid aluminum, no flex when I tamp the sand down.

Ella ★★★★★

The machined aluminum walls feel way more solid than the stamped flasks I've used before, and there's no flex when I pack the sand tight. The 3.5" size is perfect for the small pendants and rings I cast, and cleanup is quick since nothing sticks to the smooth surface.

Michael ★★★★★

The two pieces fit together snugly with no gaps, so my sand stays packed tight and the mold comes out clean every time. Being solid aluminum instead of the cheaper cast ones, it doesn't flex or warp when I ram the sand down hard.