8 Supplies for Repairing Cracked Livestock Troughs

Finding a cracked livestock trough on a freezing morning is a frustrating reality that every hobby farmer eventually faces. Instead of rushing to buy an expensive replacement, having the right repair supplies on hand can save both money and time. This guide covers the essential tools and materials needed to patch up metal, plastic, or structural foam tanks and get them back into service quickly.

Disclosure: As an Amazon Associate, this site earns from qualifying purchases. Thank you!

Assessing Trough Damage Before Starting Repairs

Before grabbing any tools, a close inspection of the damaged trough is critical to determine if it can actually be saved. Hairline cracks in plastic tanks might only need a quick weld, while deep, structural splits in heavy-duty rubber or metal troughs require a combination of reinforcement and sealant. Assessing the material type—whether it is galvanized steel, high-density polyethylene (HDPE), or structural foam—dictates the exact repair strategy.

Location also matters immensely because cracks near the drain plug or along the bottom seams endure constant water pressure and physical stress from animals. If a crack extends through a load-bearing rim or covers more than a third of the tank’s total height, structural integrity might be compromised beyond simple DIY fixes. Take the time to empty, clean, and dry the area thoroughly to map out the full extent of the damage.

Epoxy Putty – J-B Weld WaterWeld Epoxy Putty

When a fast, waterproof patch is needed on a damp surface, epoxy putty is the ultimate quick-fix material. It serves as a moldable plug that fills gouges, holes, and cracks in both plastic and metal troughs. Because it cures underwater, it is invaluable for emergency repairs when a tank cannot be fully dried out.

J-B Weld WaterWeld Epoxy Putty stands out because of its NSF-certified safe-for-drinking-water rating, making it completely non-toxic for livestock once cured. It cures to a stark white color in about 25 minutes and can be drilled, sanded, or painted after an hour. The clay-like consistency allows you to knead the two parts together easily and press it firmly into the damaged area.

Users should note that while it adheres well to most surfaces, it requires a rough texture to bite into, meaning smooth plastic must be sanded first. It is also less flexible than silicone, so it may crack over time if applied to high-flex areas of thin plastic tubs.

This putty is ideal for hobby farmers needing a fast, permanent plug for small holes or rigid cracks in metal and thick plastic tanks. It is not suitable for long, flexing cracks on thin-walled plastic tubs that bend under water weight.

• Tensile Strength: 1300 PSI
• Set Time: 25 minutes
• Cure Time: 1 hour
• Compatible Materials: Plastic, PVC, fiberglass, copper, iron, and concrete

Sealant Tape – Gorilla Waterproof Patch & Seal Tape

Gorilla Waterproofing Tape, Black, 4" x 10' (Pack of 2) - Permanent Weather Resistant Seal for Leaks and Repairs

Sealant tape provides an instant, flexible barrier over cracks, acting as a heavy-duty bandage that stops leaks immediately. It is designed to flex with the expansion and contraction of the trough as temperatures change throughout the seasons. This makes it an excellent choice for sealing long, straight cracks on flat surfaces.

Gorilla Waterproof Patch & Seal Tape is highly recommended for its incredibly thick adhesive layer and UV-resistant backing. This tape forms an airtight, permanent bond that holds up against both freezing winter temperatures and intense summer sun. It can be applied to wet surfaces, which is a lifesaver during active leaks.

Application requires a steady hand because once this tape touches a surface, it cannot be repositioned without ruining the adhesive. You must smooth out all air bubbles during application to prevent water from finding a path underneath the edge.

This tape is perfect for quick, outer-surface reinforcement on plastic or metal tanks facing moderate water pressure. It is not the right choice for high-wear areas where livestock might lick, chew, or rub against the patch.

• Width Options: 4 inches or 10 inches
• Temperature Range: -70°F to 200°F
• UV Resistance: High
• Best For: Flat surfaces, emergency wet patches, and outer-wall reinforcement

Plastic Welder – Polyvance 5700HT Airless Kit

For polyethylene or polypropylene tanks, a superficial patch often fails because the plastic expands and contracts constantly. A plastic welder melts the parent material of the trough together with a filler rod, creating a molecular bond that is just as strong as the original tank. This tool is essential for permanent, structural repairs on heavy-duty plastic stock tanks.

The Polyvance 5700HT Airless Kit is the gold standard for small-scale farm repairs because of its high-temperature ceramic element and stable heat control. Unlike hot air welders that can blow lightweight plastic away, this airless system allows you to press and smooth the melted plastic directly into the crack. The kit includes a variety of welding tips and starter rods, making it highly versatile.

There is a distinct learning curve to plastic welding, as heating the plastic too much will char and weaken it, while under-heating results in a weak surface bond. Practicing on a scrap piece of plastic before tackling the actual livestock trough is highly recommended.

This kit is best for farmers who own multiple plastic stock tanks and want a professional-grade, permanent repair solution. It is not recommended for those looking for a quick, five-minute fix or those dealing solely with galvanized steel troughs.

• Power: 200 Watts
• Element Type: Ceramic
• Included Rods: HDPE, PP, polyurethane, and ABS
• Best For: Deep cracks in thick-walled plastic stock tanks

Wire Brush – Osborn Carbon Steel Scratch Brush

No adhesive, sealant, or weld will stick to a dirty, algae-covered, or rusty livestock trough. A heavy-duty wire brush is the primary tool used to scrub away oxidation, loose rust, and stubborn mineral deposits from the repair zone. This mechanical cleaning creates a clean, textured surface that ensures maximum chemical or thermal adhesion.

The Osborn Carbon Steel Scratch Brush is built for rugged farm use, featuring densely packed, high-tensile carbon steel wire tufts. The curved wooden handle provides excellent leverage, allowing you to apply significant pressure without hand fatigue. It resists shedding wires even when scrubbing rough, pitted galvanized steel.

While highly effective on metal, carbon steel can leave tiny particles behind that may rust if not wiped clean before applying sealants. For plastic tanks, use a lighter touch to avoid gouging the material too deeply, which could weaken the tank wall.

This brush is a must-have prep tool for anyone repairing rusty metal or heavily oxidized plastic tanks. It is not suitable for delicate surfaces or thin liners that could easily puncture under stiff steel bristles.

• Filament Material: Carbon steel
• Handle Type: Curved hardwood
• Row Configuration: 3 x 19 rows
• Best For: Rust removal, paint stripping, and surface texturing

Heat Gun – Wagner Spraytech Furno 300 Heat Gun

A heat gun serves multiple purposes during a trough repair, from drying out damp cracks to softening stubborn plastics for reshaping. It is also incredibly useful for warming up adhesive tapes and sealants in cold weather to ensure they bond properly. Trying to repair a cold, damp tank in late autumn without a heat source often leads to premature patch failure.

The Wagner Spraytech Furno 300 Heat Gun offers dual temperature settings (750°F and 1100°F) that cover both gentle drying and heavy-duty plastic softening. Its ergonomic design and integrated stand allow for safe, hands-free operation on your workbench or the ground. The rugged casing is built to withstand the occasional drops and bumps common in farm workshops.

Keep in mind that this tool requires access to an electrical outlet or a portable generator, which can limit its use out in distant pastures. Users must also be careful not to hold the heat gun in one spot for too long, as excess heat can warp or melt plastic tanks beyond repair.

This heat gun is perfect for farmers needing a reliable tool to prep repair surfaces and apply heat-assisted patches. It is not ideal for remote pasture repairs unless a reliable portable power source is available.

• Temperature Settings: 750°F and 1100°F
• Power Output: 1200 Watts
• Safety Features: Thermal protection sensors
• Best For: Drying cracks, warming adhesives, and pre-heating plastic

Welding Rods – Polyvance HDPE Welding Rods

When plastic welding, using the correct filler material is crucial because mismatched plastics will not fuse together. High-density polyethylene (HDPE) is the most common material used to manufacture durable plastic stock tanks. Having a dedicated supply of high-quality HDPE welding rods ensures your plastic welds match the strength and flexibility of the trough itself.

Polyvance HDPE Welding Rods are specifically formulated to melt smoothly and bond seamlessly with standard plastic stock tanks. These flat, ribbon-style rods are easier to control than round rods, providing a wider, flatter bead that covers cracks efficiently. They contain UV stabilizers to ensure the repair does not degrade under constant sunlight.

You must verify that your trough is actually made of HDPE before using these rods, as they will not bond to polypropylene or structural foam. Always clean the rod itself with a quick wipe of rubbing alcohol to remove any manufacturing oils before welding.

These rods are essential for anyone using a plastic welder to repair modern plastic stock tanks. They are completely useless for metal, rubber, or concrete troughs.

• Material: High-Density Polyethylene (HDPE)
• Profile: Flat ribbon (approx. 3/8 inch wide)
• Color: Black (matches most heavy-duty tanks)
• Quantity: 30-foot pack

Silicone Sealant – GE Advanced Silicone 2 Sealant

For small leaks, seam sealing, or backing up mechanical fasteners, a high-quality silicone sealant is indispensable. It provides a highly flexible, waterproof barrier that can stretch and compress as the trough fills and empties. This flexibility is crucial for joints and seams that experience constant movement.

GE Advanced Silicone 2 Sealant is a premium 100% silicone formula that offers excellent adhesion to both metal and plastic. Unlike standard silicones, this formula is low-odor and releases no harsh acetic acid during curing, making it safer for livestock areas. It is 100% waterproof, shrink-proof, and freeze-proof, ensuring a long-lasting seal in harsh outdoor conditions.

Note that this sealant requires a completely dry surface during application to achieve a proper bond. It cannot be painted over, so ensure you choose the clear or gray option depending on your cosmetic preference.

This sealant is ideal for sealing seams on galvanized metal tanks or filling minor hairline cracks in plastic troughs. It is not suitable for structural repairs or wide, gaping holes that require physical support.

• Material: 100% Silicone
• Cure Time: 24 hours (water-ready in 30 minutes)
• Flexibility: High
• Best For: Seam sealing, metal joints, and minor hairline cracks

Fiberglass Kit – Bondo Fiberglass Repair Kit

When dealing with massive cracks, holes, or structural failures in fiberglass or rigid plastic troughs, adhesives alone are not enough. A fiberglass repair kit provides a combination of liquid resin and woven glass fabric to rebuild the structural wall of the tank. This creates a hard, reinforced patch that can handle immense water pressure.

The Bondo Fiberglass Repair Kit is an all-in-one solution that includes polyester resin, liquid hardener, fiberglass cloth, and an applicator. The resin cures quickly to a rock-hard finish that is completely waterproof and highly resistant to impact. It is designed to bridge large gaps, making it possible to rebuild entirely missing sections of a trough wall.

Working with fiberglass requires careful measurement of the resin-to-hardener ratio and must be done in a well-ventilated area due to strong fumes. You must wear gloves and a mask, as sanding cured fiberglass produces irritating dust that is hazardous to breathe.

This kit is perfect for repairing large structural holes in fiberglass, metal, or rigid plastic troughs. It is not recommended for highly flexible polyethylene tanks, as the rigid fiberglass patch may delaminate when the plastic flexes.

• Contents: Resin, hardener, cloth, mixing stick, and spreader
• Cure Time: 2 hours
• Strength: High structural reinforcement
• Best For: Large holes, structural cracks, and rigid tank walls

Step-by-Step Guide to Patching Your Trough

To begin the repair, empty the trough completely and scrub the damaged area with soapy water to remove algae and dirt. Use the Osborn Carbon Steel Scratch Brush to aggressively clean the surface, removing rust from metal or oxidation from plastic. Once clean, use the Wagner Spraytech Furno 300 Heat Gun to dry the area thoroughly, ensuring no moisture remains trapped in the crack.

For plastic tanks, prep the crack by drilling a tiny hole at each end to prevent the crack from spreading further under pressure. If you are welding, use the Polyvance 5700HT Airless Kit and Polyvance HDPE Welding Rods to slowly melt the plastic together, filling the groove completely. For metal tanks, apply a generous layer of GE Advanced Silicone 2 Sealant or knead and apply J-B Weld WaterWeld Epoxy Putty over the crack, smoothing the edges flat.

For large structural holes, cut a piece of fiberglass cloth from the Bondo Fiberglass Repair Kit that extends two inches past the damage. Mix the resin and hardener, saturate the cloth, and press it firmly over the hole, smoothing out any air pockets. Once dry, sand any rough edges down to prevent animals from scratching themselves when drinking.

Allowing Proper Cure Time for Animal Safety

The most common cause of repair failure is rushing the trough back into service before the materials have fully cured. While some products claim to be "water-ready" in a short time, full chemical curing is necessary to ensure the patch is completely inert and safe for livestock. Uncured chemicals can leach toxic compounds into the drinking water, posing a serious health risk to your animals.

Temperature and humidity play massive roles in cure times, with cold, damp weather significantly slowing down the process. Always refer to the manufacturer’s guidelines, but as a rule of thumb, double the recommended cure time if you are working in temperatures below 50°F. Keep the trough empty and sheltered in a dry barn or under a tarp during this critical curing window.

Once the cure time has passed, rinse the repaired area thoroughly with clean water and scrub it lightly before filling the trough for animal use. This final rinse removes any surface residue or dust left behind by the repair process. If you detect any chemical odors coming from the patch, let it air out for another 24 hours before introducing water.

How to Prevent Livestock Troughs From Cracking

Prevention is always easier and cheaper than repairing a damaged trough in the middle of a busy season. The primary cause of cracking in plastic and metal troughs is the expansion of freezing water during winter. Placing floating de-icers or stock tank heaters in the troughs prevents solid ice from forming, which exerts immense outward pressure on the tank walls.

Livestock behavior also contributes to wear and tear, as heavy animals rubbing against or stepping into troughs can stress the material. Placing your troughs on a flat, level pad of packed gravel or concrete prevents uneven weight distribution that leads to stress fractures. Securing the tanks with external wooden frames or brackets keeps animals from pushing them around and causing impact damage.

Finally, protect plastic troughs from UV degradation by choosing shaded locations or applying UV-resistant coatings. Over time, sunlight makes plastic brittle and highly susceptible to cracking under the slightest impact. Regularly draining and cleaning your tanks allows you to spot minor wear before it turns into a catastrophic failure.

Taking the time to properly repair a cracked livestock trough keeps your farm running smoothly and prevents wasted water. By choosing the right tools for your specific tank material and allowing ample cure time, you ensure a safe, long-lasting fix. With a little preparation and the correct supplies, you can extend the life of your stock tanks for many seasons to come.