Product Description

Our 3 Piece Rectangle Concrete Planter Mold Set is built for professional concrete planter production. Featuring durable fiberglass outer shells and precision silicone liners, these molds are designed for smooth demolding, repeatable results, and long-term use. The set produces a Large Planter (30" L × 12" W × 23" H), Medium Planter (25" L × 11" W × 19" H), and Small Planter (20" L × 10" W × 15" H).

Ideal for studios, small businesses, and production environments creating premium concrete planters for residential and commercial projects.

Specifications

• Built for repeatable production and long term durability
• Fiberglass reinforced outer shells maintain shape pour after pour
• Properly maintained molds can achieve 400+ uses
• Precision silicone liners create smooth, professional finishes
• Clean modern rectangle planter design with strong market demand
• Air release holes allow easy demolding using an air compressor if needed
• Built in drainage hole system
• Industrial grade construction designed for consistent production
• Produces premium architectural concrete planters with a modern commercial aesthetic

Planter Dimensions Produced

• Large Planter: 30" L × 12" W × 23" H
  
• Medium Planter: 25" L × 11" W × 19" H
  
• Small Planter: 20" L × 10" W × 15" H

These molds are engineered for serious production and designed to help create professional quality concrete planters efficiently and consistently.

Preparing the Mold

Assemble the fiberglass mold and securely tighten all bolts before pouring.

Make sure the silicone liner is seated properly inside the mold to ensure clean edges and a smooth surface finish.

Pouring the Concrete

Mix your concrete to the desired consistency.

Pour evenly into the mold while ensuring the silicone drainage button remains visible. Do not pour above this point, as the button forms the planter drainage hole.

Lightly vibrate or tap the mold to release trapped air bubbles and improve surface quality.

Curing

Allow the concrete to fully cure before demolding.

Typical curing time ranges from 24–48 hours depending on concrete mix design and environmental conditions.

Demolding

Begin by removing all bolts from the fiberglass shell.

Carefully lift the outer shell away from the planter. If the mold feels stuck, insert an air compressor nozzle into the built in air release holes and apply pressure to help release the shell.

Once removed, slowly peel the silicone liner away from the concrete planter from one side to the other until fully separated.

Finishing Touches

Each planter includes a built in drainage hole.

Light sanding or edge cleanup may be performed if desired for a refined finished appearance.

Care and Maintenance

Clean molds after each use using mild soap and water.

Store molds in a cool, dry environment away from prolonged sunlight exposure.

With proper maintenance, these molds are built to withstand hundreds of pours and long term production use.

When you order the 3 Piece Rectangle Concrete Planter Mold Set, your package will include:

• One Large Rectangle Planter Mold
• One Medium Rectangle Planter Mold
• One Small Rectangle Planter Mold
• Fiberglass Outer Shells with built in air release holes
• Precision Silicone Liners for smooth finishes and easy demolding
• All Required Hardware including bolts and fasteners for assembly

Each mold system is produced to order to ensure consistent quality, precision, and production standards.

Please allow approximately 4–8 weeks for production lead time and freight delivery. Tracking information will be provided once your shipment is in transit.