Repairing a cracked bathtub can be accomplished through the use of a commercial patch kit, which usually includes patch filler, a mixing stick, a putty knife, sandpaper and dye. Alternatively, homeowners may drill holes in the floor of the bath, inject expanding foam and replace the bathtub floor overlay.
Whether the bathtub in question is plastic or fiberglass, cracks are a serious issue and can lead to water leakage, sub floor damage and mold growth. Full bathtub replacements can often cost thousands of dollars, but many professional plumbers are experienced with various types of fiberglass repair and can address the root cause of the crack while simultaneously providing additional support to the tub. These plumbing services are far cheaper than full replacements and safer than do-it-yourself home repairs.