Reworking bubbled epoxy

[Parc Ferme]

Well i have bad case of the bubbles in my epoxy floor (Legacy HD epoxy). I have 1500sqft that i have been coating in sections, between expansion joints. With 400sq ft left, a 200 sqft section has bubbled up. It hadn't rained in 2 weeks and i coated with 40% humidity (slightly rising) with the temps dropping. I coated after dark. I followed the same guide lines for coating this section as i had for all of the rest. It was so dry, the urethane cured with a slightly textured finish. I kind of like it, as it will help conceal scratches.

I applied the epoxy and urethane as directed, and then got all these bubbles. When i purchased for this project i bought extra epoxy (300 sqft kit) because my acid etch as too strong and left me with a 60 grit sand paper-like finish. Very porous. Anyway, i have been happy with the coating thickness and will have 300 sq ft of epoxy left. Im going to finish my final 200 sq ft before i rework the bubbled section.

My question is this. if I break every bubble open, and sand/rough-up the urethane surface? Can i apply the epoxy over the urethane with decent adhesion? Would a belt sander with an over used belt be a power tool option for roughing up the area?

Some suggestions from experience are gladly accepted.

Thanks.

 

[c7fx]

oops I missed the part about the urethane. Thats what happens when I read too fast and reply....

 

[dcs Inc]

Contact your provider and ask if their epoxy can over urethane. If one of my contractors called me with that question I'd tell them get the urethane off first.

 

[Jimmy Knight]

stories like this one are why I am going with tile...

 

[Parc Ferme]

Contact your provider and ask if their epoxy can over urethane. If one of my contractors called me with that question I'd tell them get the urethane off first.

So, in your experinece the products you use adhere better to abraded epoxy than to abraded urethane?

 

[LegacyIndustrial]

Yes. You can smooth out your bubbles scuff and recoat with the epoxy.
Make sure you solvent wipe before coating again to kill the dust and contaminants.

 

[Elite Crete Australia]

Well i have bad case of the bubbles in my epoxy floor (Legacy HD epoxy). I have 1500sqft that i have been coating in sections, between expansion joints. With 400sq ft left, a 200 sqft section has bubbled up. It hadn't rained in 2 weeks and i coated with 40% humidity (slightly rising) with the temps dropping. I coated after dark. I followed the same guide lines for coating this section as i had for all of the rest. It was so dry, the urethane cured with a slightly textured finish. I kind of like it, as it will help conceal scratches.

I applied the epoxy and urethane as directed, and then got all these bubbles. When i purchased for this project i bought extra epoxy (300 sqft kit) because my acid etch as too strong and left me with a 60 grit sand paper-like finish. Very porous. Anyway, i have been happy with the coating thickness and will have 300 sq ft of epoxy left. Im going to finish my final 200 sq ft before i rework the bubbled section.

My question is this. if I break every bubble open, and sand/rough-up the urethane surface? Can i apply the epoxy over the urethane with decent adhesion? Would a belt sander with an over used belt be a power tool option for roughing up the area?

Some suggestions from experience are gladly accepted.

Thanks.

You are probably better off using a drywall sanding screen on a swing sander. The problem with a lot of sand paper is that they can potentially leave behind a residue from the mastic that is behind the abrasive. This isn't always the case but it is something you should watch out for. Using a drywall sanding screen eliminates that risk.