We have a 40 year old home and in 2 spots water comes through the cracks in the cementwalls in the basement. Looking for the most economical way to fix the walls. Have heard about some products that you spray on the walls from the inside to take care of the problem. Are there any other products out there that might be able to do the job. Don't really want to spend the money on outside excavation, if we don't have to. Looking forward to hearing from you.