Plumbers putty is a soft and pliable material that is commonly used to create seals in plumbing and other related applications. It is typically made of a mixture of ingredients such as talc, limestone, and other minerals, and is designed to be easily molded and shaped as needed. While plumbers putty can be an effective sealing material, it is not typically recommended for use with PVC (polyvinyl chloride) pipes.

The reason for this is that PVC is a type of plastic that is known for its durability and resistance to corrosion, and it is often used in plumbing applications for this reason. When used in conjunction with plumbers putty, PVC pipes can become stained or discolored, and the putty may even weaken the PVC and cause it to crack or break over time. Additionally, plumbers putty is often formulated with oils or other organic substances that can react with PVC and cause it to deteriorate.

There are other sealing materials that are better suited for use with PVC pipes, such as silicone or PVC cement. These materials are designed specifically to be compatible with PVC and to provide a strong, long-lasting seal that will not break down or cause discoloration over time. Additionally, they are typically more effective at sealing the joints between PVC pipes, as they are formulated to bond with the PVC itself and create a seamless, leak-proof seal.

In conclusion, while plumbers putty may be an effective sealing material in other applications, it is generally not recommended for use with PVC pipes. If you need to make a seal with PVC pipes, it is best to use a product specifically designed for use with PVC, such as silicone or PVC cement, in order to ensure a strong, long-lasting seal that will not cause damage to your pipes.