Why Waterproof Boots Crack & How to Stop It: Expert Outdoor Guide

Why Waterproof Boots Crack: The Real Reasons

Even high-quality rubber or neoprene boots can crack over time. This usually isn’t because the boots are “bad quality,” but because the materials naturally break down without proper care or the right storage conditions. The most common culprits include:

• Drying out from heat exposure — sun, heaters, or hot garages pull moisture from rubber and cause cracking.
• Chemical exposure — fertilizers, oils, fuels, and cleaners weaken boot material.
• Bending or folding your boots — repeated creasing in the same spot causes surface cracks.
• Improper storage — storing boots wet or in extreme temperatures accelerates deterioration.
• Long-term use in harsh terrain — mud, ice, and rocks gradually stress the material.

Understanding the cause is the first step toward protecting your gear—and extending the life of your boots.

The Science Behind Boot Material Breakdown

Waterproof boots are typically made from natural rubber, neoprene, PVC, or a blend. All of these materials stay flexible because of oils within the compound.

When those oils evaporate or break down, the material gets stiff—then cracks.

Sunlight (UV), heat, and certain chemicals speed up this process dramatically. That's why cracked boots are more common for hunters and outdoorsmen who store gear in sheds, garages, or truck beds.

How to Prevent Waterproof Boots from Cracking

With the right habits, you can easily double—or even triple—the lifespan of your waterproof boots. Here’s what experts recommend:

• Store boots in a cool, shaded area — avoid direct sunlight or hot vehicles.
• Clean after each use — rinse off mud, salt, and chemicals with clean water.
• Dry boots naturally — no heaters, blow dryers, or placing near fireplaces.
• Apply rubber conditioner every few weeks to maintain flexibility.
• Use boot hangers (like those built into Trudave waders) instead of folding or creasing your boots.
• Check the soles regularly for early signs of dryness or stiffness.

These simple steps can save you money and preserve your gear season after season.

Are Cracked Boots Still Waterproof?

Unfortunately, no. Once cracks form—even tiny surface cracks—water can seep in. This affects warmth, safety, and overall comfort.

If your boots are cracking, it’s usually a sign the rubber has aged beyond repair. Prevention is always the best solution.

When It’s Time to Replace Your Boots

You should consider replacing your boots if you notice:

• Deep cracks in the rubber or neoprene
• Separation between the boot and upper
• Loss of flexibility in high-stress areas
• Water seeping in even after patching attempts

If you hunt or fish often, upgrading to a pair built for heavy outdoor use—like Trudave’s neoprene or insulated waterproof boots—will save you money in the long run.