? 1. Applied Too Thick
• Issue: If Dura-Rubber is applied in thick coats instead of multiple thin layers, the surface can skin over and dry faster than the underlying material. This uneven drying causes tension, leading to crazing.
• Fix: Apply in thin, even coats—let each layer dry before applying the next.
?️ 2. Temperature Extremes
• Issue: Applying in hot or cold weather can interfere with proper curing. High heat can flash-dry the surface, while cold temps slow down curing and may trap moisture.
• Fix: Ideal application temp is between 55°F and 90°F. Avoid direct sunlight during application.
? 3. Surface Wasn’t Prepped Properly
• Issue: If the substrate (like concrete, metal, or plastic) wasn’t clean, dry, or fully cured, the Dura-Rubber may not bond properly, leading to stress cracks.
• Fix: Make sure the surface is clean, dry, and free of grease, dust, or loose particles.
⏱️ 4. Not Enough Dry Time Between Coats
• Issue: Layering coats before the one underneath has dried can trap solvents and cause cracking as they try to escape.
• Fix: Allow minimum dry time between coats (typically 4–6 hours depending on conditions).
? 5. Incompatible Primer or Surface
• Issue: Applying Dura-Rubber over certain primers or sealers not recommended can result in bonding issues and surface cracking.
• Fix: Use recommended primers or apply directly to a clean surface when appropriate.
Want to send a picture of what you’re seeing? I can help diagnose it more accurately. Also, let me know what surface you applied it to and under what conditions—it’ll help narrow it down.
