Too much non slip additive in polyurethane coating

[m237b]

Hello all,

Hope someone has an idea how to fix my issue. I was advised by a store owner where purchased polyurethane on specific amount of non slip additive to be mixed into the coating. Turned out, after drying out that amount of additive is too much and it wasn't spread evenly (even though was throughly mixed in) and is too visible, it looks like as white lines/stains along some of the roller tracks. I thought second coat would cover them or make less visible, but it didn't. Is there anything that can be done ? I mean, I can put a 3rd Poly coating, but it doesn't look like it is going to solve the problem .....

 

[kwfloors]

I think your going to have to aggresively sand out the non skid and apply a third coat. Probably with a floor sander to knock that non skid down. Or just keep coating til you cover them up.

 

[m237b]

Do you think it would be enough to sand problematic areas only or go for the whole floor ?
With what grit # sand paper you think it should be done ? About keep coating, not sure it is going to help as these areas have higher density of the non skid, so probably even when completely covered they probably will reflect light differently and stay visible ...not sure

 

[600SL]

The directions for my non slip additive warned that you have to keep mixing it as you apply because it is heavy and will settle out.

I don't know how bad the situation is but if its a working shop and not too bad I would leave it alone. If you put more poly on it you will need to put more no slip in.

If you want to redo it you might consider a colored poly instead of a clear poly. May help cover what's already down. My top coat matched my paint color.

 

[LegacyIndustrial]

600sl hit it on the head. Pigmented urethane will cover the issue and another coat will lessen the grit profile too.


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[m237b]

Yeah, it seems correct. Where I got Poly and non skid, owner mentioned nothing about mixing while applying, that's where all uneven areas came from, as I see more non skid where I started to roll and almost none at the end. Now, if I put more Poly with more no slip in, how can I make sure it spreads evenly between the problematic areas only and not will add to the density of them, making them even more visible ?

 

[m237b]

Can I "pigment" Poly myself, or it has to be purchased like this ? ...looks like with pigmented Poly all my flakes are going bye-bye ?

 

[600SL]

Yeah, it seems correct. Where I got Poly and non skid, owner mentioned nothing about mixing while applying, that's where all uneven areas came from, as I see more non skid where I started to roll and almost none at the end. Now, if I put more Poly with more no slip in, how can I make sure it spreads evenly between the problematic areas only and not will add to the density of them, making them even more visible ?

My understanding is that you don't need no skid it you are using flakes. the flakes are the no skid. My instructions told me to keep mixing. My no skid was a type of aluminum powder said to keep mixing it right on the label. If you use a pigmented urethane you will cover your flakes. I don't know how to correct this without sanding off all flakes. Wish I had better news.

 

[m237b]

600SL, so do you think sanding problematic areas would be enough before putting another Poly coating or the whole floor would have to be sanded ? What sanding paper grit # 70-80 ?

 

[600SL]

600SL, so do you think sanding problematic areas would be enough before putting another Poly coating or the whole floor would have to be sanded ? What sanding paper grit # 70-80 ?

Unfortunately you are beyond my level. I would say leave as is or cover with pigmented poly and loose the flakes. Pictures would help.

 

[m237b]

Here is the link:https://www.flickr.com/photos/w_oleg

Look at the four last photos marked as "Non Slip issue" you will see sort of a roller traces with a brighter colour than the rest of the floor. It is actually not visible with electric light, only with day light

 

[600SL]

Here is the link:https://www.flickr.com/photos/w_oleg

Look at the four last photos marked as "Non Slip issue" you will see sort of a roller traces with a brighter colour than the rest of the floor. It is actually not visible with electric light, only with day light

I can see it but I wouldn't mess with this. I know its disappointing to see a new floor not come out perfect but this will be unnoticeable in 6 months. And it still looks great right now.

Time to enjoy it!!!!

 

[m237b]

Hmm....I have material for one more Poly coat.....so last coat to apply and close the case ? I could do 6 mm roller (originally did with 5mm) to make it a bit thicker and apply mostly to these areas ?

 

[600SL]

Hmm....I have material for one more Poly coat.....so last coat to apply and close the case ? I could do 6 mm roller (originally did with 5mm) to make it a bit thicker and apply mostly to these areas ?

Just check my poly required no more than 24 hr between coats without scuffing.

 

[m237b]

I've applied it 16 hours ago, so I'm fine on that front. Question is if that would be fine to go thicker with 6mm roller

 

[retfr8flyr]

You don't want to apply poly to thickly. It will bubble up if it's applied in too thick a coat. I would stay with the same roller you already used.

 

[m237b]

ok, thanks...will go with 5mm then

 

[kwfloors]

Sanding I would scratch it with 80 grit.

 

[m237b]

sanding only the affected areas or the whole floor ?

 

[kwfloors]

You need to scuff the whole floor if your coating it again.

 

[m237b]

Well, all my problematic areas were in one half of the floor, so I've sanded that half, recoated and it looks much-much better now. Thanks for your help

 

[jaye944]

looked at your pics; I cant see anything wrong, looks really good to me,
I hope mine turns out as good as yours !

 

[m237b]

If you catch a right angle you'll be able to see some sort of lines where the coating wasn't uniformed and some old traces of excessive non skid additive from previous coating, but I hope in a couple months it will all become even less visible due to traffic. Good luck with your floor.

 

[BarneysGarage]

What grit did you end up using when sanding?

 

[m237b]

I used 80 grit