wall hole sealant

Constantin

I had a similar issue with penetrations through walls, though my materials were different. In my case, I had brick being penetrated by PVC, copper, and iron. I settled on a mastic normally reserved for fireproofing, which has the same color as the brick the pipes, etc. were penetrating.

These pastes are neat in that they seal pretty good, yet remain pliable, and do not attack most materials. One such product is "Flame Stop V", though I used a different one (which I cannot find at the moment).

If waterproofness is required, you could go in with a polyurethane caulk (not foam) on the inside and leave something more decorative on the outside. We used Rub-R-Wall on the exterior of our foundation wall and despite standing water, clay soil, etc. have yet to experience a wet wall.

Don \"Grumpy\" Walsh

I have two 4" pvc conduits that pass through an exterior concrete block wall at approx.14" below finish grade. Each of those conduits serve as a sleeve for the 1/2" Onix tubing that I ran for the snowmelt system. Now the curbing around the paved area has been eliminated and the grade is pitched slightly towards the area of the pipe penetrations. There is a four foot wide expanse of soil where the landscaping is to be installed; I am concerned that there might be a potential for water to migrate into the building via these two sleeves. I have considered using an expanding foam to fill the void, but I am concerned about the interaction with the Onix. I also need to make these penetrations watertight. Have any of you experienced this situation, and how did you solve the problem? Your help will be greatly appreciated.

Brad White_91

Constantin is on it

Fire and smoke-stop mastic is excellent. It often goes by the name "RTV Silicone". (RTV= "Room Temperature Vulcanizing"). Indeed it is often a red color, expands and packs well with little pull-away.

If you are installing a single line within a sleeve or core, I use link-seals but the ganged penetrations are just plain fussy.

Anything you can do to slope the grade away from the opening, please do so.

Don \"Grumpy\" Walsh

Thanks Guys, I think you have solved my problem. Oh, and have a grand 4th of July! Thanks again!

clammy

pipe sleves

When ever i go through concrete wall i will usually use a larger piece of pvc as a sleeve and then i will usually use a regular fernco reducer to seal off where my pipes go through the sleeve ,then a good quality silcone sealant if it is below grade and of course motor mix to seal the pvc sleeve throughthe building in areas where rising water table comes into play i'll try to pitch it away from the home and hope for a drain pipe abnd some gravel but if such is the case i'll try to keep it a little high .peace and good luck clammy