Review on 3M Large Hole Repair, 12 oz. High Strength by Jimmy Montalvo

If you follow the correct application procedure you will get an excellent result. After drying, it becomes very hard and durable. The correct procedure is to (1) sand the treated area and clean any loose or rotten wood. (2) If you wish, you can use masking tape on both sides of the area you will be patching. (3) If there is a hole with rotten wood, take out the rest of the rotten wood and mix it with this mixture. Pour the mixture back into the hole. (4) If you need to apply glue mask/wire, please do it now. Apply more connection. (5) Level the mixture as much as possible with a metal spatula. (6) Allow to sit and set for several hours or overnight. (7) Use a grinder to smooth the mixture as much as possible. (8) Now you can paint over the patched area. DONE !