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Old 06-05-2023, 09:30 PM   #1
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Shower Pan Cracks

Cracks in the shower pan. Using flex tape for temporary
Fix. Donít want to buy and install a new pan. Thinking about putting some sort of past on the whole bottom. Any suggestions will be appreciated. Thanks. Bud
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Old 06-06-2023, 06:22 AM   #2
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More than likely, cracks will continue, especially if you attempt to seal them up with something solid, like .... using a fiberglass (Bondo) repair on them.

What has happened is, the way the shower pan is anchored down did not permit any movement for the spots where it's anchored down (screwed down). As the floor of the trailer flexes, the shower pan does not. The pan is going to now crack at the weakest point (the cracks).

Now that is it's cracked, the cracking will slow down, but it will continue to crack out. There's nothing you can do about this as there is simply no room for movement where it's anchored.

Considering you don't want to replace it, your best option probably IS to simply tape up the cracks. This will allow the pan to continue to move and flex as you travel, but it may also spread or even create new cracks too. Still, not as much as it would you attempt to make the pan solid one piece again.

I think, your best bet, is to clean the shower pan very, very good, then use a rubberized spray liner on the bottom and cover the entire pan. In other words, you are creating a new liner on top of the old fiberglass bottom.

Creating a rubberized liner will seal up the cracks, and still allow the original cracks to flex.

Meanwhile, your tape may also be sufficient as it's basically doing the same thing. It just doesn't look very pretty.

I do know, once those pans crack and begin leaking, they only get worse. You own body weight standing on them will cause the cracks to spread, allowing water to pass under the pan and drip on down. A rubber liner will allow for the flexing. and keep the cracks sealed at the same time.
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Old 06-06-2023, 07:15 AM   #3
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Before you do anything to cover the cracks you should drill a small hole (1/8” or less) at the end of each crack to keep them from expanding.
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Old 06-06-2023, 07:35 AM   #4
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Old 06-06-2023, 09:08 AM   #5
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Thanks for the info. I’ll look for a spray rubber coating.
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Old 06-06-2023, 09:15 AM   #6
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I know for a bathtub in your home, they put down a big blob of mortar on the floor then set the tub on it. The mortar cures and supports the weight of the tub, water and person in it to prevent cracking.
I know for these showers they don't do that.
I'm wondering if you can access the drain hole from the bottom, would it help to inject just a little foam all around under the pan (not too much, it will lift the pan) to help support it (persons body weight) to help prevent the cracks from spreading.
I saw on another site where someone just wanted to refresh their shower. They painted it with Rust-oleum marine paint. For you this may help with waterproofing.
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Old 06-06-2023, 10:56 AM   #7
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On our 2010 we just used a repair kit from Amazon. Worked great and didn't look all that bad.
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