RectorSeal Duct Seal 81880 Compound, Easily Applied to Plumbing & Metal Fabrication, Paintable General Purpose Sealant, 1 lb

This is a unique product. It works well to seal up holes in electrical boxes with wire passing through. Easy to knead and shape. Not sticky to the hands but stays in place very well. Too soon to tell but seems like it will stay pliable and not harden. Bottom line a great product for sealing up those holes in the wall through out the house where plumbing or wire passes through.

In my opinion, a very underutilized form of sealing. I use it around all types of pipes/wires extending through walls, but by no means is it limited to that. Very easy to use, and long lasting.

Great stuff. I use it all the time. Form it and it stays where u put it. Great price $4.89 on Amazon and they drop it off at your door. $5.97 at Home Depot.

Love this stuff works great for my application, the consistency of the product is nice and firm, looks like it's gonna stay flexible for a while and you don't have to worry about it drying out, it's a nice thick product that will be compatible with a lot of your applications. You can use this for a lot of different things, it'll be compatible with so many of your projects ones especially where you can't use grommets because of space constraints or anytime you need a extra seal on something, this stuff is great, most of all it's not supposed to dry out so that makes it really useful.

I used it to patch holes around my air handler.

This putty is fantastic.

Exactly what I was looking for, could not find at our local big box stores

I used some of this right after receiving it. It forms a great waterproof bond and is easy to work with. I can see using all of it around the house soon.

Product appeared old and was sticky on my hand skin. Finally, after shaping product and leaving it several days to dry, I found product to have hardened, but not hard enough. I could reshape product and it wasn’t a good seal-used around the sides of ducted diffuser. Back to the drawing board. Or, next time you cut your floorboards to install a diffuser for the ducting heating, make sure you know how to use a hacksaw. Try to cut diffuser housing spot-on or you’ll be forced to search for sealants that perform lower tham expected.

Good

This product works exactly as advertised; it is incredibly useful for a number of applications and remains flexible even if the open package is stored in the ambient air (in a dark storage room, in my case, though I suspect light wouldn't affect it). I've used this material in multiple projects when I needed non-critical sealing of gaps and seams between two hard materials.

I used this to cover the hole with my thermostat wires coming into the thermostat this making the readings more accurate! It works really well, very cheap and will last me a lifetime! Highly recommend!

It works