Concrete Patch

07-04-2009, 02:58 PM	#1
joetab24 Member   Join Date: Apr 2009 Location: Southeast PA Posts: 433	Concrete Patch I am working on cleaning up my basement floor. I want to patch some holes. I purachsed hydraulic cement (DRYLOK Fast Lock). The directions mention undercutting, chiseling a "reverse V". Is this necessary for holes I am trying to fill? THanks for taking a look.

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07-05-2009, 09:24 PM	#2
Bob Mariani Remodeling Contractor   Join Date: Dec 2008 Location: Sandy Hook, CT Posts: 3,590	Concrete Patch it would help. you need to chip away any and all loose concrete around these holes first. I would then apply a coat of thermo bond (bonding agent) to help the new stick to the old.

07-05-2009, 09:48 PM	#3
joetab24 Member   Join Date: Apr 2009 Location: Southeast PA Posts: 433	Concrete Patch thanks for the reply. never done this before. i am not sure i understand the "reverse V".

07-06-2009, 06:13 AM	#4
Bob Mariani Remodeling Contractor   Join Date: Dec 2008 Location: Sandy Hook, CT Posts: 3,590	Concrete Patch Quote: Originally Posted by joetab24 thanks for the reply. never done this before. i am not sure i understand the "reverse V". it is just a way to open the crack more to allow more cement into the area for the patch. The top of the "v" is at the surface and you are angling the 45 degree cuts into the crack to open it up under the surface more. Not an issue with what you are patching.