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Discussion Starter · #1 · (Edited)
When using TSP, do you guys add bleach or do you use TSP with no additive? What do you use for mildew?
 

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Rock On
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For using it where?
Sometimes bleach for ext
Never int
 

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Discussion Starter · #5 ·
Most of our exteriors have mold or mildew Tmrrptr. We usually use bleach mixed with water in spray bottles. Wondering if TSP with bleach would do a better cleaning job. For the most part, we hand scrub all the areas being painted.
 

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Trisodium phosphate is a syngergistic chemical when added to bleach. That and it also is sequestrant, which helps removes calcium deposits, makes the detergent you use a better detergent, aka detergent builder. Emulsifies the dirt and etches the paint to give it a 'profile' for better paint adhesion. I suppose better quality paints are filled with ingredients such as 'Butyl' that sort of melts the previous layer of paint to blend in with the new for a better job. But TSP is just good old fashioned prep - that will make even 'cheaper' paints cling better.
 

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Yes Tim, a cup of TSP, gallon of bleach in a 5, and blast it on w the pressure washer... let it sit for a bit, then rinse er down. Wet all the surrounding plants before, during, and after w hose..
r
 

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Trisodium phosphate is a syngergistic chemical...... also is sequestrant..... Emulsifies the dirt and etches..adhesion ..... ingredients such as 'Butyl'
WHOA! My head hurts from the excercise of your vernacular muscle. :blink:
 

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Bleach to kill mold, but not on bare wood. TSP to outright clean and etch.

Together on painted exteriors to accomplish both tasks at the same time.

Spray it on then powerwash it off. Sometimes using a deck brush to remove mildew/mold.

The hook is that too strong a mix will not rinse off very easily.
 

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Trisodium phosphate is a syngergistic chemical when added to bleach. That and it also is sequestrant, which helps removes calcium deposits, makes the detergent you use a better detergent, aka detergent builder. Emulsifies the dirt and etches the paint to give it a 'profile' for better paint adhesion. I suppose better quality paints are filled with ingredients such as 'Butyl' that sort of melts the previous layer of paint to blend in with the new for a better job. But TSP is just good old fashioned prep - that will make even 'cheaper' paints cling better.
what he said....
 

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If you add a surfactant to the mix - not only can you bring down the concentrations to do the same job, and it requires less brushing - especially if you use warm/hot water - and will rinse more completely.
 
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