Lastly, regardless of what you do, make sure to get as much moisture out of the shower as you can, before re-caulking and grouting. Once you remove the caulk, throw a dehumidifier in the shower/bathroom for a while. The surround overlaps the rim of the tub and so doesn't "technically" require caulking.
But I would have caulked it anyway to avoid what you are seeing. There is likely mold/mildew growing in there and that's what you are seeing come out when you spray forcefully. If you were going to caulk it now, you should clean it as thoroughly as possible and give it plenty of time to dry, and caulk the.
To share pics on this sub, upload them to an image-hosting site like Imgur, copy the links, and post the links here. The best caulk depends, in part, on whether you want/need clear caulk (unlikely), bright-white, or a colored caulk to match an existing less-common color. For basic white, I'd suggest the DAP Kwik Seal Ultra (available at Home Depot and elsewhere).
Easy to work with, waterproof. If your tub is not super secure, as in it flexes a bit when you stand in it, you should fill it half full of water before caulking. I'd also recommend buying premium silicone caulk and use a decent caulking gun.
The squeezable tubes might do you okay but I had to redo mine a few times due to cracking (my tub has a ton of flex and some of the gaps are considerable). Wait at least twenty four. Best caulk for tub/shower surround? I tired using Lexel, and it did not adhere, so I'm looking for more reccoemdnations - what is the best choice for caulking a tub/shower surround? Archived post.
New comments cannot be posted and votes cannot be cast. A couple of trash bags Stool for sitting inside tub during removal and standing during caulking high points] Took me about 90 minutes to remove all caulking, take off shower sliding door and clean, remediate some mold and lubricate track/set wheels, dispose of trash and then clean + tape Took about 45 minutes to an hour to caulk, cleanup. I've used the GE silicone in tiled shower enclosures and had it last for years with no problem.
Maybe the humidity in your bathroom is just too high, maybe you're not cleaning the area well enough before caulking, maybe you have too much water leaking in elsewhere and getting behind the caulk--there's no way for me to know. People think of caulk as quicker drying, normally paintable, not quite as flexible and less water resistant than silicone. Caulk would be applied in dry areas to be painted, often along skirting boards, coving or window internals for example whereas silicone would be installed around a sink, shower, bath or window externals.
Was this Shower Grout Repair worth the $500 estimate? Anything I should ask to be redone? He'll be back in an hour after it dries and wants to know if we want to have it sealed with "commercial" Enduro sealer for another $200. Refreshing caulk every year or so goes a long way to preventing water damage and mildew. Caulking a shower or tub is an easy DIY, too! Here's how to get professional.