The best thing I can offer for that scenario is to use our Antiquing Concrete Stains and our Tinted Concrete Sealer and with it being so old it would be best to do it in this order.
1. Clean off slab by first soaking in a citrus based degreaser for 20 minutes then power washing
2. Let dry 24 Hrs.
3. Apply 1 thin coat of Tinted Concrete Sealer in a Solvent Based Satin (color of your choice) then let dry 12 hrs.
4. Apply our Antiquing Concrete Stain in however many colors you like with whatever application method you like and let dry 6 hrs.
5. Apply 1 more thin coat of Tinted Concrete Sealer in a Solvent Based Satin (color of your choice) then let dry 24 hours and you should be done!
We are sandwiching the Antiquing stain in the sealer because your concrete is so old its most likely extremely porous and the Antiquing stain would disappear as soon as you applied it without a coat of sealer to stop it from penetrating too deep.
On that note you might want to expect needing 3 coats of sealer total if its extremely porous.
I have streaking with the water based concrete sealer. Is there a way to help fix this?
Suggestions for prepping the wall? How high up and what material (plastic, paper…)
Is everstain and sealer safe to use on outdoor con create fountains that birds may drink out of?
I am looking for a stain for an indoor cement pad. I know just enough chemistry to get myself in trouble, so I have decided that the phenolphthalein dye’s would work well and certain that the alkalinity of the cement will give me a nice blue color and that the imperfections in the skim coat on top of the cement pad will add some realism to the result. Then I would seal in with a non-slip water-based polyurethane. Am I off the mark here?