Recently had quartz countertop and backsplash installed and there had to be a joint in the backsplash. Whatever was used to adhere the joints, (caulking or sealant) was carelessly wiped across the backsplash in several spots and dried to a thin,milky film. I used a razor blade they left behind to remove excess product that was raised but there remains these areas obviously still with a coating on it. What can I use to safely remove this film of their product?

  • 2
    Photos would help, different caulks/sealants can be dealt with in different ways. Also you might try the ideas in this related question Commented Jul 1, 2022 at 18:40
  • Try wetting+soaking with different solvents and wiping with a towel. You can smoosh a wetted napkin onto the vertical surface to hold the solvent against the face for 5-10 mins before wiping. I would hit it first with 70% isopropyl alcohol, then if needed try other solvents in order of vinegar, lime-away, acetone, and naptha (zippo lighter fluid).
    – dandavis
    Commented Jul 1, 2022 at 19:30
  • 3
    Why not call the installers back and have them fix the mistake on their dime? It was a poor installation job, they should fix it!
    – Milwrdfan
    Commented Jul 1, 2022 at 22:51
  • Agree try a few different solvents. If you go to an auto-parts store, they have a special chemical made to remove RTV gaskets (your caulk might be RTV).
    – Kyle B
    Commented Jul 2, 2022 at 5:16
  • 1
    Do NOT use any chemicals, you might damage your quartz top. Use the razor method.
    – Traveler
    Commented Jul 2, 2022 at 6:09

1 Answer 1


They already left you the best tool for that

4 Inch Razor Blade Tile Scraper

But the blade needs to be replace every so often.

razor blade

A old used razor blade would not work, so replace it !

Source: Amazon

Just make sure you always hold it flat to the surface of the counter top, and not more the 45 dgr

  • 1
    What makes you think this would be any more effective than the razor blade the OP already used?
    – brhans
    Commented Jul 1, 2022 at 19:27
  • @brhans his razor blade was already used, and not sharp enough.
    – Traveler
    Commented Jul 1, 2022 at 19:33
  • 1
    You need to apply some pressure so the blade doesn't ride over the caulk, and doing so is easier when the blade is in a handle like this. You need to change the blade frequently. Buy a box of 100 from Amazon, it costs less than a tube of caulk. Using the leftover blade from the installer that he probably shaved with before he arrived won't get you results. I wouldn't use 4 inch, I'd use smaller ones but you can experiment to find the tool you like.
    – jay613
    Commented Jul 2, 2022 at 3:27
  • The razor isn't going to work unless the surface is "perfectly flat".
    – Kyle B
    Commented Jul 2, 2022 at 5:14
  • @KyleB so what would you recommend to do in this case ?
    – Traveler
    Commented Jul 2, 2022 at 5:57

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