Epoxy detail around a drain

[climb.on]

In the attached garage we taped off the edge of the plastic channel drain. See first 2 pics. I feel like because the epoxy and clear coat is so thick, it left a decent size lip that seems like it will fail rather quickly. Especially since this is where all the crud will be flowing around. I filled all the control joints with a flexible polyurea joint filler, but I wonder if it's the right thing here next to the drain. Perhaps a hard epoxy filler would be better in this spot...

I'm about to do my shop next, but would like a better result. I'm thinking of extending the epoxy right to the inside edge of the channel and not taping it off like the attached garage. Channel drain is made of polypropylene I think.

What's best practice in this situation?

 

[jabberwoki]

I did the same thing around the drain in my paint booth , worked like a charm.

 

[climb.on]

I did the same thing around the drain in my paint booth , worked like a charm.

Did you tape off the plastic (like the first two pics)? How long ago? Any issues with it peeling up?

 

[climb.on]

Anyone have thoughts about filling seams after putting down the epoxy? I don't really care to much about "hiding" the seams under the epoxy, I just want to eliminate the weak points where it might eventually fail.

 

[Armorpoxy]

One of the things we recommend around drains when possible is to cut in a small 'slot' with an angle grinder and cut wheel. The 100% solids epoxy 'runs into' the slot and makes a definitive stop point that shouldn't chip or peel. This only works with 100% solids epoxies as they will cure at almost any thickness.

 

[LegacyIndustrial]

Key the edge. Leaves a nice amount of material, this is technically how all transitions should be treated although few do it.

 

[climb.on]

Key the edge. Leaves a nice amount of material, this is technically how all transitions should be treated although few do it.

What does "key" mean? Round over the corner of the joint? Make it wider? Both?

 

[LegacyIndustrial]

What does "key" mean? Round over the corner of the joint? Make it wider? Both?

Grinding down the edge so that the liquid coating will be "fat" right at the edge.

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[climb.on]

Perfect thank you. I'll do that! Do you suggest epoxy first, then a joint filler filler over the top to fill the key?

 

[LegacyIndustrial]

The coating should be allowed to fill the key.
Once cured it should look level like the rest of the floor.

The only coating that can be used to fill the key is 100% solids epoxy. Anything else will bubble and make a mess.

 

[climb.on]

I am using high solids ~85%

 

[LegacyIndustrial]

I am using high solids ~85%

Bubbles.


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[NitroShark]

I filled all the control joints with a flexible polyurea joint filler

.

If you put flexible joint filler on first then coated over it. You have cracks waiting to happen now.

Hope you didn't do that...


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[climb.on]

Bubbles.

Don't call me that

.

If you put flexible joint filler on first then coated over it. You have cracks waiting to happen now.

Hope you didn't do that...

I did. I am expecting some cracks in the control joints...and probably else where too. But I'll have fewer of them than if I filled the joints after the fact. Now around the drain, I wish I would have filled the joint after. I'm going to do it that way in the other building. But all the other control joints are getting filled first.