How to Make Soft Plastic Fishing Lures

Table of Contents

1. Introduction
2. Why You Should Make Your Own Lures
3. Safety Equipment and Setup
4. Essential Tools and Materials
5. Step-by-Step: Heating and Mixing
6. How to Inject the Mold
7. Advanced Techniques: Laminates and Highlights
8. Troubleshooting Common Problems
9. Curing and Storage
10. Making Lures in the Field
11. The Cost-Benefit Analysis
12. Summary Checklist for Lure Making
13. Conclusion
14. FAQ

Introduction

Standing on the bank of a hidden pond or the deck of a boat, you realize you have run out of the one color of worm the bass are hitting. Every angler has faced this frustration. You find a "hot" bait, only to lose the last one to a submerged stump or a toothy pike. Learning how to make soft plastic fishing lures solves this problem while allowing you to create custom colors and shapes that the fish in your local waters have never seen. At BattlBox, we value self-reliance and the ability to maintain your gear and supplies regardless of what the local shop has in stock, and you can choose your BattlBox subscription if you want more field-tested gear delivered monthly. This guide covers the essential tools, safety protocols, and step-by-step techniques required to pour or inject your own professional-quality baits. You will learn to turn liquid plastic into a customized arsenal ready for your next adventure.

Quick Answer: To make soft plastic fishing lures, heat liquid plastisol to 350°F until it becomes clear and syrupy. Mix in your desired colorants and glitter, then use an injector to pump the liquid into a dedicated lure mold. Once the plastic cools for a few minutes, remove the lure and let it cure for 24 hours.

Why You Should Make Your Own Lures

Making your own soft plastics is about more than just saving money. While the initial investment in tools costs a bit upfront, the price per lure drops significantly over time. A gallon of liquid plastic can produce hundreds of worms, craws, or swimbaits.

The real advantage is customization. Most commercial lures are designed to catch fishermen as much as they are designed to catch fish. When you pour your own, you can adjust the softness of the plastic. You can make a "finesse" worm that is incredibly supple for cold water or a durable "toad" that can survive multiple strikes in heavy lily pads. You can also compare your own builds against the basics in What Are Soft Fishing Lures Made Of?, which breaks down the materials behind these baits.

Recycling is another major factor. Every time a soft plastic bait gets torn, most anglers throw it away. As a DIY maker, you can save those torn baits in a bin. You can melt them down and reform them into brand-new lures. This reduces waste and keeps your tackle box full for the cost of a little electricity.

Safety Equipment and Setup

Working with liquid plastic involves high temperatures and chemical fumes. You must prioritize safety before you even open a bottle of plastisol. Liquid plastic usually reaches 350 degrees Fahrenheit (177 degrees Celsius) to achieve the proper consistency for pouring.

Personal Protective Equipment (PPE)

You need to protect your skin and lungs. A drop of 350-degree plastic on your hand will cause a severe burn because it sticks to the skin while it continues to transfer heat. For a ready-made upgrade, check the Medical and Safety collection for protective gear that belongs in any workshop.

• Gloves: Use heat-resistant gloves. Welding gloves or heavy-duty silicone kitchen mitts work well.
• Eye Protection: Wear safety glasses or a face shield. If the plastic "pops" or an injector fails, you do not want hot liquid in your eyes.
• Respirator: Liquid plastisol releases fumes as it heats. Work in a well-ventilated area, like a garage with the door open, and wear a respirator rated for organic vapors.
• Long Sleeves and Pants: Cover your skin to prevent accidental splashes from causing burns.

The Workspace

Set up a dedicated workbench that is level and heat-resistant. A piece of plywood or a metal table works best. Avoid working on surfaces that can melt or absorb chemicals. Keep your workspace organized and free of clutter. You do not want to trip or snag a cord while carrying a hot cup of liquid plastic. If you want a compact light for your bench or garage, browse the flashlights collection for a reliable work light.

Important: Never get water near your hot plastic. Even a single drop of sweat or water from a damp mold can cause a "steam explosion." The water instantly turns to gas, spraying molten plastic everywhere.

Essential Tools and Materials

To get started, you need a few specific items. While you can go "pro" with expensive aluminum molds and automated stirrers, a basic setup is surprisingly affordable.

Plastisol

Plastisol is the liquid material used to create the lures. It is a suspension of PVC particles in a liquid plasticizer. When heated, these particles fuse together to create a solid, flexible material. It comes in different "durometers" or hardness levels:

• Super Soft: Best for drop-shot baits and small trout lures.
• Standard/Medium: The most versatile choice for worms and craws.
• Hard/Salty: Used for jerkbaits or lures that need to withstand heavy cover.

If you want a broader primer on the material science behind baits, What Are Fishing Lures Made Of? is a useful companion read.

Heat Source and Containers

A microwave is the most common way to heat plastic for hobbyists. Use a dedicated microwave that is not used for food. You will also need Pyrex or high-heat tempered glass measuring cups. These allow you to see the color and consistency of the plastic as you work.

Molds

Molds come in two primary styles: open-pour and injection.

• Open-Pour Molds: These are usually made of silicone or stone. You simply pour the plastic into the top of the cavity. They are great for beginners but usually produce lures with one flat side.
• Injection Molds: These are typically two-piece aluminum blocks. You clamp them together and use an injector to force the plastic inside. These produce fully round, professional-looking baits.

The Injector

If you are using injection molds, you need a specialized tool called a plastic injector. It looks like a large metal syringe. We often see high-quality metal injectors last for thousands of pours, provided they are kept clean and lubricated with a tiny amount of worm oil. For a related everyday-carry light that fits in a kit, the Olight i1R 2 Pro Keychain Flashlight is a compact option.

Additives

This is where the creativity begins. You will need:

• Liquid Colorants: Concentrated pigments designed specifically for plastisol.
• Glitter: High-heat resistant glitter. Do not use craft glitter, as it will melt and bleed into the plastic.
• Scent: Oil-based scents like garlic, crawfish, or anise.
• Salt: Fine-ground salt increases the weight of the lure and affects the sink rate.

Step-by-Step: Heating and Mixing

The heating process is the most critical part of the job. If you under-heat the plastic, it won't be strong enough. If you over-heat it, it will "scorch" or turn yellow and smell like burnt hair.

Step 1: Prepare the Liquid

Shake your bottle of liquid plastisol thoroughly. The PVC particles settle at the bottom over time. If you don't mix the bottle well, your lures will be sticky or won't cure properly. Pour the desired amount into your Pyrex cup.

Step 2: Initial Heating

Place the cup in the microwave. Heat it in 30-second bursts. After each burst, take the cup out and stir the plastic with a metal butter knife or a glass stirring rod. Do not use wood, as it can introduce moisture or air bubbles.

Step 3: The Transition Phase

The plastic will go through three stages. First, it is a milky white liquid. Second, it will become thick and "clumpy" like mashed potatoes. This is normal. Continue heating and stirring. Third, it will turn back into a liquid that is clear and has the consistency of warm maple syrup.

Step 4: Final Temp Check

Once the plastic is clear, check the temperature with a digital infrared thermometer. You are looking for a range between 340°F and 360°F. Once it hits this range, it is ready for additives.

Step 5: Adding Color and Glitter

Add your liquid colorant one drop at a time until you reach the desired opacity. Stir well. Next, add your glitter. A little goes a long way. If you are adding salt, do it last, as salt will settle to the bottom quickly. If you need a quick refresher on lure types before you pour, What Lures to Use for Fishing is worth a look.

Key Takeaway: Proper temperature management is the difference between a durable lure and a scorched mess. Always stir between heating cycles to ensure even heat distribution.

How to Inject the Mold

If you are using a two-piece aluminum mold, the injection process requires a steady hand and a specific technique.

1. Prepare the Mold: Ensure the mold is clean and clamped tightly. Any gap between the two halves will result in "flashing," which is thin, unwanted plastic sticking out of the sides of your lure.

2. Lubricate the Injector: Apply a drop of worm oil to the rubber O-rings on your injector. This ensures a smooth draw and prevents the plunger from sticking.

3. Draw the Plastic: Submerge the nozzle of the injector into the hot plastic. Slowly pull the plunger up. Do this slowly to avoid sucking in air bubbles.

4. Inject the Mold: Place the nozzle into the "sprue" (the hole at the top of the mold). Press the plunger down with firm, steady pressure. Once the mold is full, you will feel resistance.

5. Top Off the Sprue: As the plastic inside the mold cools, it shrinks slightly. Keep the injector on the hole for a few seconds and leave a small "button" of extra plastic at the top. This "top-off" ensures the lure doesn't have hollow spots or dents.

Bottom line: Injection molding creates the most professional-looking lures, but it requires careful attention to the "top-off" phase to account for plastic shrinkage during cooling.

Advanced Techniques: Laminates and Highlights

Once you master the basic pour, you can start creating "laminate" baits. These are lures with two different colors, such as a dark green back and a pearl-white belly.

Using a Dual Injector

A dual injector consists of two separate barrels connected to a single nozzle. You fill one barrel with one color and the other barrel with a second color. When you push the plunger, both colors enter the mold at the same time, creating a perfect 50/50 split. This is how the most expensive "hand-poured" look baits are made.

Hand-Dipping

For tube baits or custom "dipped" tails, you can take a finished lure and dip just the tail into a different color of hot plastic. This is an easy way to add a "chartreuse tip" to a worm without needing a complex mold.

Highlight Powders

Highlight powders are ultra-fine micas that add a pearlescent shimmer to the outside of the bait. You can either mix these into the plastic or lightly dust the inside of the mold before pouring. This gives the bait a "slime coat" look that mimics a real baitfish.

Troubleshooting Common Problems

Even experienced makers run into issues. Here is how to fix the most common mistakes.

Denting or Collapsing

If your lures have sunken spots, it usually means the plastic cooled too fast or you didn't leave enough of a "top-off" at the sprue. Try heating your mold slightly before injecting, or hold the injector on the hole longer with more pressure.

Air Bubbles

Bubbles are usually caused by moisture or by stirring too vigorously. Ensure your stirring tool is dry and move it in a slow, circular motion. If you are recycling old baits, ensure they are completely dry before melting them down.

Incomplete Fills

If the plastic doesn't reach the thin tail of a worm, it is likely too cold. Plastisol thickens as it cools. Re-heat the plastic back to 350°F and try again. You may also need to vent your mold by lightly filing a tiny groove where air can escape.

Sticky Lures

If the lures feel "tacky" even after cooling, the plastic wasn't heated high enough to fully convert. It could also mean the plastisol wasn't mixed well in the bottle before pouring. Unfortunately, sticky lures cannot be fixed; they must be melted down and brought to the correct temperature.

Curing and Storage

Your lures will be "fishable" within minutes of coming out of the mold, but they aren't actually finished. Soft plastics need time to "cure."

When you remove a lure from the mold, it is still technically a bit soft and prone to deforming. Lay the baits flat on a tray or a piece of parchment paper. Do not pile them on top of each other, as they will take on the shape of whatever they are resting against.

Let the baits cure for at least 24 hours. During this time, the chemical bonds fully stabilize. After curing, you can bag them. Add a few drops of worm oil or scent to the bag to keep them from sticking together. For more background on lure construction, How to Make Plastisol for Fishing Lures is a solid next step.

Note: Never mix different types of soft plastics in the same bag. Some plastics use different chemical bases that will react with each other, eventually melting both baits into a gooey mess.

Making Lures in the Field

While most people make lures in a garage or workshop, the skill of melting and reforming plastic is useful for long-term outdoor stays. If you have a metal cup and a campfire, you can melt down torn baits and pour them into a "carved" mold made from clay or even wood.

Our community of outdoorsmen often looks for ways to extend the life of their gear. Being able to take three torn-up worms and turn them into one fresh, functional bait is a survival skill for the dedicated angler. It ensures you can keep catching food or enjoy your hobby even when you are miles from civilization. If you want to build a more capable kit around that mindset, see BattlBox subscription options for monthly gear.

The Cost-Benefit Analysis

Is making your own lures worth it? Let’s look at the numbers. A standard bag of name-brand soft plastics costs between $5.00 and $8.00 for 8 to 10 baits.

A gallon of plastisol costs roughly $40.00 to $60.00. That gallon will produce roughly 400 to 600 standard six-inch worms. Even factoring in the cost of colorants and glitter, your cost per bait drops to roughly $0.10 to $0.15.

The savings are undeniable, but the primary value remains the ability to create exactly what you need for the specific conditions you are fishing. If your next project needs a field-tested backup for the water, the Medical and Safety collection has essentials worth keeping nearby.

Summary Checklist for Lure Making

Before you start your first batch, run through this quick checklist to ensure a successful pour:

• Ventilation: Is the fan on or the door open?
• Safety: Are your gloves and safety glasses on?
• Moisture Check: Is the cup, stirring tool, and mold completely dry?
• Shake the Bottle: Did you shake the plastisol for at least 60 seconds?
• Temperature: Did the plastic reach 350°F and turn clear?
• The Top-Off: Did you leave a reservoir of plastic at the mold opening?
• The Cure: Are the baits laying flat to set for 24 hours?

Conclusion

Learning how to make soft plastic fishing lures is a rewarding way to deepen your connection to the sport. It bridges the gap between being a gear consumer and a gear creator. By mastering the temperatures, the injection process, and the curing phase, you can produce professional-quality tackle that rivals anything on the market. We at BattlBox believe in the power of specialized knowledge and the value of high-quality tools. Whether you are looking to save money, catch more fish with custom colors, or simply enjoy the process of making things with your hands, lure making is a skill that pays off every time you head to the water. Build your kit, practice your pours, and get ready for the satisfaction of catching a trophy on a bait you made yourself. Subscribe to BattlBox and keep the next mission coming. Adventure. Delivered.

FAQ

What is the best temperature for pouring soft plastic lures?

The ideal temperature for most plastisols is between 340°F and 360°F. At this temperature, the plastic becomes clear and thin enough to flow into fine details of a mold. If the temperature exceeds 380°F, you risk scorching the plastic, which ruins the color and creates a foul odor. For more on bait selection, What Lures to Use for Fishing is a useful reference.

Can I melt down old lures to make new ones?

Yes, you can recycle old soft plastic lures by melting them down. Ensure they are clean and completely dry before heating, as moisture will cause the plastic to bubble or explode. Be aware that mixing different brands may result in strange colors or inconsistent hardness, as different companies use different chemical formulas. If you want to compare materials, What Are Fishing Lures Made Of? is a helpful follow-up.

Are the fumes from heating plastisol dangerous?

Liquid plastisol releases small amounts of fumes that can be irritating to the eyes and lungs if inhaled in large quantities. Always work in a well-ventilated area, such as a garage with a fan or an open door. For maximum safety, wear a respirator with organic vapor cartridges to protect your respiratory system. A compact light from the flashlights collection can help you keep your workspace visible and organized.

Why are my soft plastic lures sticky?

Sticky lures are usually caused by under-heating the plastic, meaning it never reached the temperature required to fully "convert" the PVC. It can also happen if the liquid plastisol wasn't mixed well before heating, leaving an imbalance of plasticizer. Ensure you heat the plastic until it is clear and stir the raw material thoroughly before use. If you want a broader look at lure-building basics, How to Make Plastisol for Fishing Lures covers the full process.