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How to fix a chip in bathtub?


Fixing a chip in a bathtub is typically a three-step process: cleaning the bathtub, filling the hole with epoxy paste, and then repainting the bath. Porcelain, fibreglass and metal bathtubs can all be repaired in this manner.


PC-11 56g White Epoxy Paste is typically used to fill any damage on the surface like chips. Once those holes are repaired, White Knight 500ml White Tub And Basin Paint is applied over the repaired section and tub. The epoxy paste repairs damage, and the tub paint resurfaces and rejuvenates the bath. 


To fix a bathtub chip, we suggest using PC-11 56g White Epoxy Paste because it is  waterproof, non-toxic, and once dry can be sanded down. By just mixing a small batch you should be able to cover a chip and lightly sand it down to make it blend in with the tub.


First wash the area with dishwashing soap and a green pad scrubber. This will clear the spot of oil, wax and soap residue. Your goal is to make sure that it is free and clear of loose chips and debris before you start putting on the epoxy paste.


No pre-sanding is required before using the epoxy paste as the surface you are working on is already rough. As soon as the surface is totally dry, you can begin the application of the epoxy paste.


I recommend not making the patch too high or proud of the surface of the tub. Try feathering the edges so that the patch blends in with its surroundings.


Once the epoxy has cured, you can sand it down starting at 240 grit and then using 320 grit or higher. If you've laid the patch evenly, only moderate sanding will be necessary to flatten the patch.   


If you are lucky, once the epoxy has dried white it might match the bath and not require painting. But typically, you will need to paint the bathtub to mask the repair.


For repainting, we suggest using White Knight 500ml White Tub And Basin Paint. It dries to a tough, tile-like finish to restore previously discoloured or unsightly surfaces.


Remember that if you have chips in a bath that has been painted previously, all of the compromised paint needs to be removed before you can apply new paint. Prepare the surface by sanding the flaking areas with 120-grit sandpaper. Remember to wear a dust mask. Remove all the chipping paint and then sand back into the non-chipped area until you reach solid paint that is well bound. You can then swap to 240-grit sandpaper and smooth out any rough spots. 


You'll then be able to clean the tub thoroughly and re-paint with White Knight Tub and Basin. Here is a handy step-by-step guide: How to paint a bath - EricL and MitchellMc



Just Starting Out

I just repainted my bathtub with white knight tub and basin. 

the bathtub had been previously repaired. I am unsure what they used to fill the hole. In my prep I had sanded back etc. 


after applying the white night a part of the old repair has lifted up creating a tag. How do I remove or repair the tag so it doesn’t catch?  The white knight second coat has just been appplied. It has a touch cure time of 6 hours and then I have a 5 day wait for full curing. 



The before pic was when I was partway through sanding. I did think I had sanded it all the way back before painting but I think it then lifted a little. Lesson learned to go all the way back to the metal, but is there anything I can do about the flap now?

Community Manager
Community Manager

Sorry for the delay @charliediy, our resident Bunnings D.I.Y. expert @EricL will get back to you ASAP. 


Let me extend a very warm welcome to the community. We look forward to reading all about your projects and plans for around the house and garden.




Bunnings Team Member
Bunnings Team Member

Hello @charliediy 


My apologies for the late reply, if the flap is soft and looks like it can be cut, I suggest using nail clippers or cuticle cutter to trim it off. 


However, if the flap has hardened along with the paint, it will be necessary to sand it off. I don't recommend pulling the flap as this might pull the new finish off the tub.


It will be necessary to do a bit of a touch up if while sanding the flap off a bit of damage occurs to the finish of the tub. I recommend using a small paint brush to repair any scratches on your tub.


Please make sure to wear personal protection such as gloves, goggles and a dust mask while repainting your tub.


If you need further assistance, please let us know.




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