Said It Here

Is old black flooring adhesive safe to remove?

Old black flooring adhesive left behind on concrete can look suspicious, leaving homeowners unsure if it is safe to scrape off or simply cover over with new planks. This uncertainty stops people from safely finishing their flooring removal or knowing whether they can install new vinyl directly over the residue.

Overview
People affected3 accounts across 1 forum
Workarounds found5 items attempted
Community agreement7 total upvotes

What people tried

Every workaround mentioned in the threads below. We haven’t tested any of them — and nobody here is claiming they worked.

Found another way around this?

Share your steps and trade-offs so fellow engineers don't have to reinvent the wheel. No account required.

  1. 1
    stopping the removal process
    Did this help you?
  2. 2
    getting a sample tested
    Did this help you?
  3. 3
    applying a skim coat over the adhesive
    Did this help you?
  4. 4
    Placing a rug and bed over the old hearth
    Did this help you?
  5. 5
    Leaving the carpet over it
    Did this help you?
Tried another approach not listed above?+ Share your workaround ↑

In their words

Unedited, grouped by where they were said, most upvoted first within each place, each linked to the thread it came from.

r/Flooring3 people · September 2026

“Bought a house and whilst decorating the master bedroom found this flooring under the carpet.”source ↗

“is this suitable to keep as is if we wash/sand?”source ↗

Silver-Actuator-6633 · r/Flooring · 5 upvotes

“Is this safe to remove.”source ↗

FrodoShaggingz · r/Flooring · 1 upvotes

“So i took this old Stick and peel flooring that was installed on grey concrete about 15 years ago. A pain in the you know to take off so i just stopped. But the i saw this area that aas sorta black? The sticky adhesive on the vinyls is black so im hoping it was that but whos to say?”source ↗

“And should i just put my new vinyl planks over it? And other area that i took off the cement look normal”source ↗

LoadGroundbreaking13 · r/Flooring · 1 upvotes

Where this came up

People with this problem also raised