Concrete & Masonry Sealers Q&A

Question 1

I have a 1958 built house with a sunroom that has a concrete floor. It was painted with exterior green concrete paint that is easily rubbed off on your hand in the form of a dust. Can I paint over this with your paint or do I need to get rid of the old green paint first? View answer

Asked 6 ´years ago

Question 2

Can this concrete paint be used over old wall paint that ended up in the perimeter area? View answer

Asked 6 ´years ago

Question 3

Which product is best as a coating for a new concrete garage floor to prevent oil dripping into concrete from cars? View answer

Asked 4 ´years ago

Question 4

Are the color tints used also zero voc? View answer

Asked 6 ´years ago

Question 5

PFAS question View answer

Asked 2 ´days ago | Green Building Supply, Penetrating Gloss Sealer

Question 6

Is AFM WaterShield the right product to apply to the walls in a bathroom to repel moisture? The previous owner of my home had a bathroom (with shower) built, with NO fan to deal with moisture in the air when the shower is running. When I use this shower I use a window fan to push the moist air out, but, lots of moisture collects on the walls/ceiling in the bathroom. No issues with mold/mildew. How can I make these walls more hydrophobic so when the shower is used, the condensation that collects doesn't stick so readily, allowing the walls to dry more quickly after being wiped down. I will get a bathroom fan installed eventually but I want to add a water repellent on the walls (applied on top of the wall paint). Any product suggestions? View answer

Asked 4 ´years ago

Question 7

I have a terra cotta kitchen floor that hasn't been impregnated or sealed for more than 18 years. What do you suggest especially with a household with cats? View answer

Asked 1 ´year ago

Question 8

What sheen is best for a natural slate kitchen floor? Our floor looks very dry, and we don't mind it looker darker with a sealant but don't want extremely shiny. View answer

Asked 6 ´years ago

Question 9

Will this work on Terrazzo tiled floor? View answer

Asked 6 ´years ago

Question 10

Can this be used on previously sealed concrete floors? We are looking for something to help reduce the off-gassing from the sealant already applied. View answer

Asked 3 ´years ago

Question 11

Will this seal cinder block walls? View answer

Asked 5 ´years ago

Question 12

I am interested in your GBS concrete sealer. I just put Behring concrete stain on my concrete floor so I don't know if the GBS can penetrate. View answer

Asked 10 ´years ago

Question 13

Can I apply a wax, like Bioshield Wax Finish, to a concrete floor that has been sealed with this product? Does it need a "sacrificial" wax layer? View answer

Asked 6 ´years ago

Question 14

I am building a tiny house in my backyard. The foundation will be a concrete mono slab. I would like to use the slab as the finished floor. Will this sealer be good to use for a finished look on a concrete floor? View answer

Asked 4 ´years ago

Question 15

Can I use this product on a concrete block exterior wall ? My wall is starting to deteriorate due to neighbors watering View answer

Asked 2 ´years ago

Question 16

Can thinset be used over concrete that's sealed with the penetrating sealer? Would it interfere with the adhesion? View answer

Asked 6 ´years ago

Question 17

My basement concrete foundation walls had previously been painted with latex paint years ago. Can WaterShield be applied over top of the old latex paint? View answer

Asked 6 ´years ago

Question 18

Can I apply this to a concrete floor to prevent moisture from coming up through the concrete? View answer

Asked 5 ´years ago

Question 19

How is this sealer applied? I presume it's spread over the tile and grout and the excess wiped off. View answer

Asked 6 ´years ago

Question 20

How much area will the grout sealer sample cover? View answer

Asked 5 ´years ago

Question 21

Does this product contain PFAS or other fluorinated substances, which are known as the "forever chemicals" and are quite toxic? Most grout sealers apparently contain them. Thanks! View answer

Asked 3 ´years ago

Question 22

I live in an old farmhouse with a stone basement that have been parged. The walls crumble and create a mess. Will Watershield work? View answer

Asked 5 ´years ago

Question 23

Will GBS Penetrating Concrete Sealer work for polished concrete? Do you carry any caulk, sand, or silica substance that can be used to fill cracks in the concrete prior to applying GBS Penetrating Concrete Sealer?The concrete in the basement was recently ground to "salt and pepper" look and caulking from radon mitigation was removed with it. The radon levels went up from what they were before. There are various hairline cracks that I planned to grind clean and fill prior to applying the sealer. View answer

Asked 3 ´years ago

Question 24

Hi, I just put new tile on my home, and I'm about to add the grout and I'm looking for a sealer. I have 5 dogs and want something that is waterproof for when they have accidents and also they come in with dirty soil paws and would like for my grouts not to stain. I clean everyday so I will make sure it always clean but staining has happened to me before ina previous tile, and I didn't know sealers existed. What could be the best products for this. And also do I apply it at the same time as grout of after the grout has fully dried? View answer

Asked 2 ´years ago

Question 25

Is this suitable as a waterproofer on variance plaster in a shower? View answer

Asked 5 ´years ago

Question 26

Can this be used to seal cork wall tile? View answer

Asked 4 ´years ago

Question 27

Will this work for sealing concrete tiles on a bathroom floor? View answer

Asked 5 ´years ago

Question 28

I have an interior cement basement wall in a rec room that is starting to crumble in places because moisture is coming through. I used drylock 15 years ago and it worked great for years, but boy did it stink! It looks like I need to repeat the process now on a small area of the wall. What less awful product can I use to seal it this time? (It was painted over with Ben Moore latex paint so it does have paint on it) Or could I use drylock and then seal that in, but with what? Thanks in advance! View answer

Asked 6 ´years ago

Question 29

Will it stop the moisture from coming up through the concrete? View answer

Asked 5 ´years ago

Question 30

Can I use the safe coat watershield in a shower floor with travertine tile to seal it? View answer

Asked 4 ´years ago

Question 31

My landlord just re grouted the grout lines on our kitchen countertop which has porcelain tiles. Our place is very old, and he used a white TEC Color Matched Sanded Caulk Grout. It has cured but is a little rough because of the sand in it. He said he is not doing anything else to it, but will pay for inexpensive material(s) for us to do our self if there is something to smooth/seal it. Would grout sealer work? We have kids and really need to get this fixed. View answer

Asked 5 ´years ago

Question 32

Which is recommended to seal basement concrete floor prior to carpet install, WaterStop or Green Building Supply, Penetrating Concrete Sealer? View answer

Asked 6 ´years ago

Question 33

I am restoring the interior of a building which has a poured concrete floor and block walls. Previously, both the walls and the floor were painted, but since at one end of the building the ground rises several feet up the wall on the outside, the moisture from the earth managed to seep through just a little, causing damp on the floor and wall in that area, and eroding the paint. What product would you recommend to solve this slight dampness? would its use require me to remove the old paint completely (which would be a chore)? I intend to panel the walls and repaint the floor, and do not want recurrence of the problem. View answer

Asked 6 ´years ago

Question 34

I'm looking to redo my basement floors and considering delta-dye by legacy industrials, do you know if this would be an appropriate sealer as I want to go with something healthier than their recommended sealers? If not, do you have anything that may be suitable? View answer

Asked 4 ´years ago

Question 35

Can you use the sealer on existing sealed grout? View answer

Asked 5 ´years ago

Question 36

I bought a 1936 concrete home in Miami Florida in January in the dry season. The town has no storm drainage system( which I didn't know) and the property is in a flood zone. We are elevating the ground 18 inches with soil around the entire foundation, and grading a slow slope down away from the house. I want to waterproof the concrete foundation before we push the soil up against the house. What is the best material to use? I was told that an epoxy liquid would be good to coat on the foundation, but I have no idea if that's good. Thanks for any help you can provide. We don't have a basement, only a crawl space. View answer

Asked 5 ´years ago

Question 37

Can I use this on a cement surface where I park my car? View answer

Asked 6 ´years ago

Question 38

Can liquid nails and grout adhere to concrete after this has been used to seal a pot being used as a fountain? View answer

Asked 5 ´years ago

Question 39

Hi! I recently lime washed my stone fireplace. We love the way it looks, but are now thinking the previous owners must've stained the stone because the limewash is still pretty dusty and not entirely calcified. Will this product work to seal the lime washed stone? View answer

Asked 6 ´years ago

Question 40

I have an interior brick wall and brick fireplace. What product can I use to get a clear matte seal finish does not have to be waterproof? View answer

Asked 4 ´years ago

Question 41

I'm building a tiny home on a trailer. I want the walls to breathe but still be waterproof beneath the cedar siding. This product seals too strongly for that correct? What would you recommend? I might be driving in the rain at times so water intrusion will be higher than a standard build. View answer

Asked 5 ´years ago

Question 42

Can this be used to seal grout for a reptile rock wall? View answer

Asked 3 ´years ago

Question 43

Hi! i bought a gallon and painted the inside of my planters but read in your instructions it should not be exposed to sun or the elements. Since mt boxes are angled, above soil line there will be 10 inches exposed to sun and rain on all my 10 planters. Should I coat this with something else? Ideally white (and even more ideal if i don't need to coat again but i do want it to last). Thank you! View answer

Asked 4 ´years ago

Question 44

Can I use this in bathroom shower to seal grout? Also can I use it for exterior applications? View answer

Asked 3 ´years ago

Question 45

Does this help with a leaking roof? View answer

Asked 6 ´years ago

Question 46

Can this product be used over painted concrete basement floor with no efflorescence? Floor has detectable moisture (since it is a basement), but nothing visible. View answer

Asked 6 ´years ago

Question 47

I applied two coats of AFM Concrete Floor paint almost three months ago and now there is an oily substance leaching out of the paint all over the floor. I wipe it up and comes right back. What's up with this? View answer

Asked 10 ´years ago

Question 48

I want to paint my garage floor. What do I use to clean the floor 1st before painting? View answer

Asked 6 ´years ago

Question 49

I have a painted concrete basement floor and white powder coming through will this product cover it? View answer

Asked 6 ´years ago

Question 50

So is this considered breathable? As a new slab takes 2 years to fully dry... will this trap moisture or let it come through? View answer

Asked 2 ´years ago

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