Which to Choose: Plumbers Putty or Silicone Caulk for Plumbing Seals?

The choice between plumbers putty and silicone caulk often depends on the specific needs and requirements of your plumbing project. Each material has its own advantages and disadvantages, which we will explore in detail to help you make an informed decision.

Understanding Plumbers Putty

Best for:

Sealing joints in plumbing fixtures like sink drains where a watertight seal is needed but not a permanent bond

Advantages:

Easy to apply and remove Remains flexible and can accommodate slight movements Typically used for non-porous surfaces

Disadvantages:

Not suitable for areas exposed to water pressure Can break down over time if exposed to water continuously

Understanding Silicone Caulk

Best for:

Sealing gaps in areas exposed to water such as around sinks, tubs, and showers

Advantages:

Waterproof and resistant to mold and mildew Provides a strong permanent bond Flexibility allows it to move with surfaces

Disadvantages:

More difficult to remove once cured Requires a clean dry surface for proper adhesion

Conclusion

For drain fittings and applications that need to be disassembled easily, plumbers putty is the ideal choice. For areas that require a waterproof seal, especially where water exposure is constant, silicone caulk is the better option.

Appropriate Usage Scenarios

Plumber’s putty is ideal for setting faucets, sink basket strainers, shower and pop-up drains. Its flexibility and non-setting nature make it suitable for non-porous surfaces.

Silicone caulk is used for sealing around plumbing fixtures such as bathtubs, showers, toilets, and sinks. It is also excellent for weatherproofing your house. Its waterproof and mold-resistant properties make it a preferred choice for bathrooms and outdoor areas.

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Characteristics Comparison

Plumbers putty/plumbers mate is a water-resistant, flexible compound that fits all uneven surfaces and acts as both a sealant and a cushion for ceramic fittings. While it does harden over time, it remains a consistent, creamy white color.

Silicone sealant is also water-resistant and flexible even when set. It fills all uneven surfaces and acts as a sealant and cushion on ceramic surfaces. Silicone comes in a range of colors to closely match surroundings.

Both compounds perform the same basic function, but silicone tends to be more adhesive and has a tendency to squeeze out, leaving minimal space between parts. Plumber's mate is denser in makeup and provides a more suitable cushion for parts.

Technically, plumbers putty is considered the better choice due to its superior flexibility and cushioning qualities. However, silicone caulk will still get the job done, albeit less effectively.