Question on Corotech v440 epoxy

[dhuston99]

Got my 500sq new concrete slab diamond ground and cleaned, ready to start the epoxy this weekend. This is just going to be a woodshop, no cars or chemicals. I have Corotech V155 100% solids pre-primer and Corotech V440 for the color coat. 25 lbs of flakes. Planning on 1 coat of primer and 2 coats of color with flakes in 2nd coat.

Question 1

The primer sts 500-800 sq ft per gallon for masonry with a 2.0-3.2 mil thickness. If I use the whole gallon of primer with I have issues? Best way to judge thickness if trying to use partial gallon? I do have a 3/16 notched squeegee but was planning on just using 3/8 9inch roller. Any advice on the primer?

Question 2

I have 3 gallons on the V440. It sts 375-475 sq ft per gallon with 15.9-1.9 mil dry thickness. Was planning on just doing one gallon first then doing the other 2 gallons for second coat but now worried about the second coat being too thick. Would this be an issue again? I guess I can just do 3 separate coats with each gallon but that spreads my time frame out as it has a 8 hr recoat time.

Question 3

I havent gotten a topcoat yet as I dont know what my local store has. Will I be okay to not have a topcoat? Benefits to topcoat?

Thank you for any suggestions.

 

[kd3pc]

if it states 375-475 and you have 500 sq feet, I would speak with the manufacturer about coverage....and have several gallons of each on standby if needed.

flakes will likely be exposed without a top coat.

Your questions should be directed to the manufacturer. I would not be in a hurry to start until you get them answered.

 

[dhuston99]

Thank you for the reply. I guess my main concern is about too much product. I can go get another gallon of the V440 and just use two gallons for each coat. But that gives me 750-950 sq ft of coverage. Is it best to just mix that much and not pour it all out on the floor?

 

[Shea]

Got my 500sq new concrete slab diamond ground and cleaned, ready to start the epoxy this weekend. This is just going to be a woodshop, no cars or chemicals. I have Corotech V155 100% solids pre-primer and Corotech V440 for the color coat. 25 lbs of flakes. Planning on 1 coat of primer and 2 coats of color with flakes in 2nd coat.

Question 1

The primer sts 500-800 sq ft per gallon for masonry with a 2.0-3.2 mil thickness. If I use the whole gallon of primer with I have issues? Best way to judge thickness if trying to use partial gallon? I do have a 3/16 notched squeegee but was planning on just using 3/8 9inch roller. Any advice on the primer?

Question 2

I have 3 gallons on the V440. It sts 375-475 sq ft per gallon with 15.9-1.9 mil dry thickness. Was planning on just doing one gallon first then doing the other 2 gallons for second coat but now worried about the second coat being too thick. Would this be an issue again? I guess I can just do 3 separate coats with each gallon but that spreads my time frame out as it has a 8 hr recoat time.

Question 3

I havent gotten a topcoat yet as I dont know what my local store has. Will I be okay to not have a topcoat? Benefits to topcoat?

Thank you for any suggestions.

1) It states right in the data sheets for the V155 primer that it should be applied at a recommended film thickness of 2 -3.2 mils using a 1/4" nap roller. With a coverage rate of 500 - 800 square feet for concrete, you should be OK using close to the entire gallon since you profiled the surface via grinding.

2) The V440 is applied with a resulting dry film thickness of 1.5-1.9 mils. It is a water-based epoxy and cannot be applied thicker than that or you will have a variety of cosmetic issues. You shouldn't use much more than a gallon for each coat.

3) 25 lbs. of 1/4" color flakes for 500 square feet is going to be a medium coverage. Since this is a wood shop, I would recommend applying a clear coat with anti-slip media mixed in. Sawdust and other debris is going to catch in and around all those color flakes and make cleanup more difficult. Bare concrete would be easier to clean. Because sawdust can be slippery, the anti-slip in the clear coat will help.

I would recommend staying with the manufacturer's line of products in order to retain your warranties. Once you mix in a different manufacturer's product, the warranties for both are out the window. Plus, you know there will not be any compatibility issues.

 

[dhuston99]

So I got the primer and first coat down but neither covered as far as the mfg said. Used the whole gallon of primer and two gallons of V440. Problem is some weather came in and has put me past the 72 he recoat window. What is the best way to scuff sand the first coat before going on the next one? I was think about using a drywall sanding pad on a pole with some 120 grit. Will that get the job done? Also, there seem to be some places where there are little clumps of gloss. I thought it was beads of condensation when I first looked at it. Any help is greatly appreciated.