For any remaining adhesive use a pressure washer with hot water. Make a paste by mixing laundry detergent and warm water.
Allow the concrete to air dry.
How to get outdoor carpet glue off of concrete. One of the easiest ways to remove carpet glue from concrete is to scrub it off or use a scraper. Scrub the concrete with the scouring pad until all the glue is removed. If there s not much glue on the concrete a putty knife might even do the trick.
Sometimes this will work and may save you from buying an adhesive remover. Use the heat gun that you rented at the hardware store to remove any extra pieces of carpet that may be left sticking to the concrete. Use a soft bristled brush and soapy water to scrub as much of the glue away as possible.
Doubling the heat gun with a metal paint scraper will help keep you from burning yourself on the hot glue and carpet. Work in small sections so that you can remove the softened carpet glue before the water cools. Pour some boiling water on the carpet glue let it sit for 10 20 minutes apply the heat gun for a couple of minutes and scrape the glue to remove it from the concrete.
Then place the brush on the floor and scrub away glue residue using straight forceful pushes. Depending on the specific glue used and its age you may be able to simply boil a pot of water and apply it to the dry glue in order to loosen it up. Allow the hot water to mix with the glue for 1 2 minutes.
Pour the mixture on the concrete glue and allow it to sit for about three minutes. It s mostly the agitation with a brush that produces the results. Removing adhesive residue is normally a combination of trying different solvents available from the paint department of the local hardware store and a lot of elbow grease.
If there is still a significant amount of glue covering the concrete then you will want to use a large pot so you have enough water. Dip the heavy duty scrubber brush into the solution and let it soak for a moment. If your brush starts to dry out dip it in the solution again before continuing.
When the glue starts to become pliable use your scraper tool to work it out of the concrete. In order to make the scrubbing more effective mix one gallon of hot water with one cup of ammonia and a tablespoon of liquid detergent in a container. Using harsh chemical strippers or an indoor concrete cleaner is not necessary most of the time and using a scrubber will easily scrape away residual mastic.