Coating Information and Estimating Guide

[benwah]

Hello all, I am new here and would like to contribute something that would probably help a lot of you out there. I am a consultant for a coating manufacturer in the US and they have been kind enough to make a killer guide for us, so I have scanned that and made it into a .PDF for everyone's convenience. I use this guide almost daily for estimating costs, square footage and mil thicknesses among other things.

https://drive.google.com/file/d/0ByN9yrP2RcWzNWNpbmwtbjNYY28/edit?usp=sharing

You will find in this guide:

1. Surface Preparation Standards - Page 1
I've added 2 pictures from the internet that are pretty accurate, sorry for the low quality, you'll just have to zoom and squint.

2. Coating Calculations..........2-4
Coverage............................2
Wet Film Thickness...............2
Dry Film Thickness................2
Cost/Mil Sq. Foot..................2
Spreading Rate.....................3-4

3. Conversions.....................5-10
Area...................................5
Density...............................5
Length................................5
Weight (Mass)......................6,7
Pressure..............................6
Volume...............................6,7
Temperature........................8-10

4. Dew Point Temperatures.....11-13

5. Volume of Thinner Required..14

6. Wet Film Thickness Requirements...15-16

7. Square Foot Coverage for Different Shapes...17-18

8. Surface Areas..................19-24
Water Storage Tanks............19-20
Pools..................................21
Pipes..................................22
Steel Beams........................23
Corrugated Metals................24
Roof Decks..........................24
Siding.................................24

You can download the .PDF by pressing CTRL+S. This will make it easier to view and zoom. I promise you this is a virus free file as I have just created and uploaded it to Google docs. You do not need a Google account to view and save this. If someone is concerned with this, please have a MOD look at it and verify.

 

[SunsetsAndFriends]

Oh no! My computer has been taken over by, yet, more floor coating information. Thank you. I love this.

 

[SunsetsAndFriends]

I haven't gotten very far into this, but I really 'love' the photos and the chart on page 2, regarding concrete surface preparation. Very sweet!!

 

[kwfloors]

I like the 'kiss' method, that looks like to much figuring.

 

[benwah]

I like the 'kiss' method, that looks like to much figuring.

Right, well the purpose of this guide is to figure...

Most people here would only use the surface prep and wet/dry mill section. But there are other tools and formulas for various applications in the coating industry, that's why I included those as well.

Say you have a 25x35 - 875 sq. ft. floor and you want to coat it. You think to yourself, "Oh no, how much paint do I need?!"

You know the epoxy primer that you're using is 66% +\- 2% solids. After looking at the product data sheet you see the suggested film thickness is between 4.0 and 7.0 mils DFT. You take a quick look at page 3 and see that you should be able to cover between 174-209 sq. ft. per gallon (between 5 and 6 mils DFT) for a 65% solids primer, so let's just call that 192 for an average.

875/192 = 4.5, so you know you need 5 gallons of primer!

If you have a wet film thickness gauge, you can look at page 15 and see that you need to stay between roughly 8.0-10.0 mils wet to achieve that dry film thickness.

On to your intermediate. It's a 100% solids epoxy. Manufacturer recommendations call for anywhere between 6.0-12.0 mils DFT. A 100% solids epoxy doesn't have solvents that evaporate into the air, so you know whatever you lay down wet, will dry at that same thickness. You want to be on the safe side and opt for 10-12 mils.

You see on page 3 that, theoretically, you can expect to cover 160 sq. ft. per gallon at 10 mils, but it doesn't have anything for 12?! What do you do, guess? No, you glance to the right where those scary numbers are. You see that 1604 x P (where P is volume solids) dived by D (which is the dry film thickness you want) will give you your dry mil thickness. Well we already know that 100% solids epoxy doesn't have solvents so we can omit the P.

1604/12 = 133.6 so 134

Then simply average 160 and 134 and you get....147!

875/147 = 5.95, so you know you need 6 gallons of 100% solids epoxy!

Now for your urethane top coat. You see that your clear is 62% solids and the manufacturer recommends between 2.0-3.0 mils DFT. Taking a look at page 3 once again, you look at the 60% solids line, You see that at at 2 mils you should get 481 and at 3 mils 321, but what about 62% It's not there.

Once again, back to that scary formula.

1604 x .62 (for 62% solids) dived by 2.5 mils (Right between 2.0 and 3.0) gives you... 397.79, so 398 sq ft per gallon at 2.5 mils.


875/398 = 2.198, so you know you need 2 gallon of urethane!


A few simple equations and and some basic research show me I need 5 gallons of primer, 6 gallons of intermediate and 2 gallons of clear.

I used 3 different way to figure each number, each being accurate. This can and will save you time and money trying to figure how much product you will need for a job. Pretty simple.

All the extra information in there is just a bonus for people estimating other projects or for basic knowledge! I hope some of you out there find this informative and useful

 

[Shea]

There is something to be said for the KISS method for some DIY projects. Over thinking has kept many people from putting down epoxy floors. That's why many garage floor epoxy kits are tailored for the typical 2-car garage - to make it as easy as possible for the over thinkers and intimidated.

However, this is a great download for the people who don't have the typical garage as well as engineer's at heart and others who take the time to understand what they are trying to accomplish. Not everyone wants to use something like this, but for others it can be invaluable.

 

[nolimits76]

Probably too many years in construction management and dealing with engineers -- but I like understanding the nuts & bolts of a project. I know, it's probably a sickness, lol.

Thanks for sharing!

You see on page 3 that, theoretically, you can expect to cover 160 sq. ft. per gallon at 10 mils, but it doesn't have anything for 12?! What do you do, guess? No, you glance to the right where those scary numbers are. You see that 1604 x P (where P is volume solids) dived by D (which is the dry film thickness you want) will give you your dry mil thickness. Well we already know that 100% solids epoxy doesn't have solvents so we can omit the P.

1604/12 = 133.6 so 134

Kind of -- P isn't really ignored, it just becomes 1. But for all practical purposes, you end up with the same result.

Remember...any % divided by 100 is equal to the decimal format. That being said:

100% / 100 = 1
80% / 100 = 0.80
75% / 100 = 0.75

And so on and so forth.

Using that logic, we do the formula again:

= (1604 * P) / D
= (1604 * 1) / 12
= 1604 / 12
= 133.66 or 134

Again, we get to the same end result. Just now we are mathematically correct.

 

[muzazah]

TMI for a DIY newbie but if you do this day in and out then I am sure this is very helpful.