Resin Flower Vase Molds — Round or Hexagon with Test Tube Insert (Mold Only or Mold + Test Tubes)

Resin Flower Vase Molds — Round or Hexagon with Test Tube Insert

Large silicone molds for casting decorative resin flower vases. Each mold includes a central tube insert that creates a hollow channel in the finished piece — a clear test tube slots into this channel and holds water and fresh or dried flower stems. Available in Round or Hexagon shape, as a mold only or bundled with 10 clear test tubes. Select your option from the dropdown.

See more See less

Options

Round — $31.00 (mold only)

Mold dimensions: 194mm wide × 198mm tall × 42mm deep (7.64 × 7.80 × 1.65in)
Circular disc shape with central tube insert for the stem channel

Hexagon — $31.00 (mold only)

Mold dimensions: 195mm wide × 225mm tall × 42mm deep (7.68 × 8.86 × 1.65in)
Six-sided geometric shape with central tube insert for the stem channel

Round Set — $37.74 (mold + 10 test tubes)

Round mold (as above) bundled with 10 × clear test tubes.

Hexagon Set — $37.74 (mold + 10 test tubes)

Hexagon mold (as above) bundled with 10 × clear test tubes.

10pcs Test Tubes — $23.92 (test tubes only)

10 × clear acrylic test tubes for use with the vase molds. Replacement pack or add-on for those who already have a mold.

Dimensions: 25mm diameter × 150mm long (0.98in × 5.91in)
Round-bottomed, open-top tubes — fill with water and insert fresh or dried stems

How It Works

The mold has a central tube insert that sits upright during the resin pour. When the resin cures and you demold the piece, this creates a precise hollow channel running through the center of the vase. A test tube filled with water slots into this channel, allowing you to display fresh flowers, dried stems, or single blooms in your resin vase.

Details

Mold material: food-grade silicone — flexible, non-stick, easy to demold
Resin compatibility: epoxy resin (recommended for large pours)
Finish: high-gloss inner surface for a clear, polished cast
Reusable: yes — clean after each use and store flat

How to Use

Ensure the tube insert is securely positioned in the center of the mold. Seal the base of the insert with a small amount of resin or putty if needed to prevent resin seeping underneath.
Mix your epoxy resin according to the manufacturer’s instructions. These are large, deep pours — use a slow-cure epoxy resin rated for thick pours to avoid overheating. Consider pouring in 2–3 layers if using a standard epoxy.
Add inclusions to the resin before or between layers — dried flowers, leaves, and petals encapsulated in the resin create a stunning pressed-flower effect around the vase body.
Pour slowly, remove bubbles with a heat gun or torch, and cover to cure fully on a level surface (typically 48–72 hours for a large pour).
Demold by gently peeling back the silicone. Carefully remove the tube insert to reveal the hollow channel.
Sand the base flat if needed. Insert a test tube filled with water and add your flowers.

Design Ideas

Pressed flower vase: embed dried flowers and leaves in the resin body for a botanical display piece
Clear crystal: pour in crystal-clear resin with no inclusions for a minimal, modern look that lets the flowers take center stage
Ocean/marble swirl: teal, white, and navy pigments swirled through the body for a decorative statement piece
Tinted resin: soft pastels or earthy tones for a contemporary home décor aesthetic

Frequently Asked Questions

Do I need a special epoxy resin for a pour this large?
Yes — standard epoxy resins have a maximum recommended pour depth (typically 5–10mm per layer). For a 42mm deep pour, use a deep-pour or casting epoxy resin rated for thick pours, or pour in multiple layers allowing each layer to partially gel before adding the next. Using a standard laminating epoxy in a single deep pour can cause overheating and yellowing.

Can I use fresh flowers inside the resin?
Fresh flowers must be fully dried before embedding in resin — any moisture will cause cloudiness, bubbling, and deterioration over time. Press and dry your flowers thoroughly (at least 1–2 weeks) before use, or use pre-dried botanicals.

How do I keep the tube insert centered during pouring?
The insert is designed to stand upright in the mold. For extra security, add a small amount of poster putty or a drop of glue around the base of the insert before pouring to prevent it shifting as resin flows in.

Will the test tube fit the channel exactly?
Yes — the test tubes (25mm diameter) are sized to match the tube insert in the mold. Use the matching test tubes from this listing for a precise fit.