I have often mixed speed of hardeners to get the speed I want. But, the purpose of this post is I just seem to not have the hardener I want when I want it. Is there any disadvantage to just stocking fast and very slow and blending the hardeners? I would assume 40% fast and 60% very slow would hit about the speed of normal? Or is there something in the Fast that I should be concerned about? I know some fast hardeners have an accelerator in them that, well, should not be used unless you absolutely "have to".
Mixing/Blending Hardeners on Univeral
- Thread starter Bartman
- Start date
Barry, I understand. My climate in coastal SC is similar to yours. I can have frost and need A/C in a 48 hour period. I'm just looking for the most flexible stock of hardeners. I have a heated downdraft booth so I seldom spray below 60-65 degF and do a low bake at 120 if I'm in a hurry. On a side note, after using Universal for years, I just started spraying Euro2020 over the summer and was in love. Now I'm not as in love and gone back to exclusively spraying Universal. I guess it is based on how I spray and my gun, but do you hear that from anyone else? Does Euro2020 excel in the hot months? If I stick with Universal year round, is very slow too fast for me when it's over 95 degf? Just thoughts, best two products I have ever sprayed.
With your both blending activators would be no issue at all.
As far as the 5000 it should never be an issue as you decide the speed and viscosity with how you reduce it and speed of reducer.
Now 4:1;1 with a 1.3 tip, yes I could see it drying too fast in high heat.
now mixed 4:1;1.5 to 4:1:2 and proper speed reducer, should not be an issue but nothing is exact in this business.
Also the opposite of common sense:
90 degs.
mix 4:1:2 with medium reducer the clear will dry faster because you have thinned the solids and the reducer is too fast for temp.
mix 4:1:2 with slow and it will slow speed a little from less solids but reducer is proper for temp so not a big improvement but some.
Very slow would be trick or shot of retarder.
As far as the 5000 it should never be an issue as you decide the speed and viscosity with how you reduce it and speed of reducer.
Now 4:1;1 with a 1.3 tip, yes I could see it drying too fast in high heat.
now mixed 4:1;1.5 to 4:1:2 and proper speed reducer, should not be an issue but nothing is exact in this business.
Also the opposite of common sense:
90 degs.
mix 4:1:2 with medium reducer the clear will dry faster because you have thinned the solids and the reducer is too fast for temp.
mix 4:1:2 with slow and it will slow speed a little from less solids but reducer is proper for temp so not a big improvement but some.
Very slow would be trick or shot of retarder.
I think I should try 5000 with more reducer. In hot weather, I sprayed with slow activator and very slow reducer, 4:1:1 but because of the temp the viscosity was lower. Now I have just been changing reducers with temperature and still using slow activator. My mix room is NOT heated so the clear, activator and reducer have been cooler than the part being painted (not by a lot, 5-8 degF differential). Everything works fine but I have too much texture. I think I need more reducer as temperature cools.