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Cleanup of Old Sealant — Clean the Mating Surfaces

Beginner2 hours

Part of project

How to Replace a Bathtub Overflow Drain Gasket · Step 4 of 7

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Once the drain is removed, the remaining old, yellowed silicone sealant is visible around the tub opening. Using a combination of fingers and a piece of steel wool, the old sealant is pulled and scraped away to prepare the surface for cleaning and refinishing.

Goal: Prepare Surface for Refinishing

Used in this video

  • Steel Wool (brand: Unknown, Tool Accessibility: Common household item, Tool Material: Metal, Tool Complexity: Simple, Durability: Low, Tool Type: Painting Tools, Abrasiveness: Medium, Cost: < $10) · optionalTo scrub away remaining bits of old sealant and debris from the tub surface.
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FAQs

How difficult is replacing a bathtub overflow gasket, and what's a realistic time commitment for a beginner?

This is considered a beginner-level plumbing DIY project, primarily involving simple disassembly and reassembly. While the estimated time is 2 hours, allow yourself extra time, perhaps 3-4 hours, especially if the old gasket is stubborn or significant cleaning is required, to avoid rushing.

What should I do if my bathtub overflow still leaks after replacing the gasket?

First, ensure the new gasket is properly seated and the overflow cover plate screws are tightened snugly, but not overtightened, which can warp the plate. If the leak persists, carefully inspect the mating surfaces for any remaining debris, cracks, or imperfections on the tub itself or the overflow pipe that could be preventing a complete seal. You might need a thin bead of plumber's putty or silicone sealant around the edges of the gasket if the surface is uneven.

Do I need all the specific tools and materials listed, or are there acceptable alternatives?

The multi-screwdriver is essential for removing and reattaching the overflow plate. While specific brands are listed, any multi-purpose screwdriver with appropriate head sizes will work. For cleaning, an all-purpose cleaner and rags are crucial; the specific brand isn't critical, but a hydrogen peroxide-based cleaner is effective. The utility blanket is mainly for protecting surfaces, which can be substituted with old towels or cardboard.

What's the best way to remove an old, stubborn, or brittle overflow gasket without damaging the tub?

After removing the cover plate, carefully use a small, flat-head screwdriver or a utility knife to gently pry out the old gasket, working slowly around its edges. If it's very brittle, it might break into pieces, which is fine; just ensure all fragments are removed. Take extra care not to scratch the tub's finish or the overflow pipe's surface during removal.