What are the best methods for sealing joints in water-filled PVC sculptures?

Sealing joints in water-filled PVC sculptures is crucial to prevent leaks and ensure longevity. Here are the best methods to achieve a watertight seal:

1. PVC Solvent Cement: This is the most reliable option for permanent bonding. Apply the cement to both surfaces, press them together, and hold for a few seconds. The chemical reaction melts the PVC, creating a strong, waterproof bond.

2. Silicone Sealant: For flexible joints, use a high-quality silicone sealant designed for underwater applications. Apply evenly along the joint and smooth with a finger or tool for a clean finish.

3. Epoxy Putty: Ideal for repairing or reinforcing joints, epoxy putty can be molded into gaps and hardens into a waterproof seal. Sand it smooth after curing for a seamless look.

4. Heat Welding: For advanced DIYers, heat welding melts the PVC edges together, forming a solid, leak-proof joint. Use a heat gun and welding rod for best results.

5. Rubber Gaskets: For removable or adjustable joints, rubber gaskets provide a tight seal. Ensure the gasket is properly sized and compressed to prevent leaks.

Always test your sealed sculpture with water before finalizing the project to ensure no leaks remain. Proper sealing ensures your PVC art remains functional and visually appealing for years.