I've always used drying type all purpose, troweled on, for this in the past.
Can You Skim Coat Concrete Walls. Skim coating can freshen up old concrete blocks and give your home or a wall on your property a new look. Concrete mixes rocks with the portland cement, thus, because of the rocks, can't be applied by hawk and trowel to any wall.
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A skim coat is a thin coat of joint compound—also known as mud—that you can use to repair or smooth out an area on a wall.v161483_b01. Smoothing wall texture can be a time consuming task. Skim coating can freshen up old concrete blocks and give your home or a wall on your property a new look.
This can involve the application of a single coat of mud to hide minor imperfections or it can involve the use of several coats to build up a smooth, finished.
Skim coating can freshen up old concrete blocks and give your home or a wall on your property a new look. Some materials weigh more than others so it will be based on the amount of solution in litres or gallons unless i know the pvc (pigment volume content) because it can be 90% which means the coating is like mud or 10% which makes it like water. Concrete is used for driveways, sidewalks, bridges, etc. Full skim coating is tricky and it takes some practice (and a lot of sanding) to get a decent result.
