Armortop question

[Southbound35]

After a recent successful garage floor re-do with Armorpoxy Armorclad, I'm now considering redoing our back patio with their Armortop.

The back patio was poured in 2 sections, likely several years apart, and there is a 1" expansion joint between the sections. The joint was filled with some sort of material then the entire patio was epoxied. Just after we moved in, the material in the joint began to crack and fall out.

I recently removed the rest of the material, which was white and crumbled easily, almost like gypsum, and was left with a 1" space between the two slabs. I filled this joint with backer rod and polyurethane concrete sealer, to keep further moisture from getting under the slabs. Now I have a large gray "stripe" running between the two slabs.

I'm planning on re-painting the entire patio with Armortop epoxy, mainly to change to color. My question is, can I paint over the polyurethane filler in the joint with the Armortop? If not, is there another way to fill the joint or cover the polyurethane sealer before the epoxy goes on?

 

[benwah]

It is not common practice to install epoxy over a polyurethane sealer. I would suggest not doing this.

My suggestion would be to remove the product that you originally used and fill with a gel crack filler or flexible epoxy, before coating with epoxy. Keep this in mind, being outside the concrete is exposed to much more weather (freeze/thaw cycles) and may crack again.

Another option is to use an expansion joint cover in lieu of filling the joint.

 

[Southbound35]

Can you elaborate on the "expansion joint cover"?

 

[benwah]

Not a problem!
https://www.google.com/#safe=off&q=expansion+joint+cover

 

[Southbound35]

Can anyone provide any further info on expansion joint covers? I've searched multiple times and what I'm finding is more industrial applications and items related to construction. I need something DIY friendly if I'm going to go that route.

Additionally, I've contacted Armorpoxy and have yet to receive a response. I'm hoping they might have a specific product I can use to fill the gap that I can then paint over with epoxy. Can the Armorpoxy rep on TGJ give me some assistance?