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Product Description

Houghto-Prep ZP3 is a cleaner and self-limiting coating for ferrous, aluminum, and other non-ferrous components in preparation for paint and other organic coatings. Houghto-Prep ZP3 cleans and coats faster for short dwell times. The Houghto-Prep ZP3 displaces surface soils/oils and using an efficient proprietary zirconium oxide chemistry, producing an amorphous coating that promotes paint adhesion and salt spray resistance. This easy-to-operate technology will reject oil extremely efficiently, allowing for continuous and complete removal with any oil removal system. Also, minimal removal of metal occurs, giving low levels of sludge and long bath life.

Houghto-Prep ZP3 is used at 1.5 - 2.5% by volume at 85 to 100° F. It is suitable for both soak and spray applications. The high cleaning efficiency of the product ensures effective cleaning of even heavily soiled components. The coating is formed during cleaning giving a single step process. The coating gives equivalent to superior salt spray corrosion protection and excellent adhesion to subsequently applied topcoats as compared to iron phosphates.


Cleaner performance can be affected by extremes of water quality. Hard water (in excess of 300 ppm CaC03) and high levels of sulphates and chlorides can reduce the stability of emulsions and reduce corrosion protection. Your Houghton Representative can advise on local water quality.


Concentration Temperature Range Concentration Control 1.5 to 2.5% 85 to 100°F Titration or Conductivity

Features & Benefits

Light to Medium soils

1. Houghto-Prep ZP3. 

2. Rinse.

Depending on local regulations, overflows may be discharged to local POTW.


Medium to Heavy Soils

1. Houghto-Clean 8170.

2. Rinse.

3. Houghto-Prep ZP3.

4. Rinse.

Bath life can be extended by using an oil coalescer or proper oil removal device.

Your Houghton representative can advise as many operations are different.


Houghto-Prep ZP3 can be controlled by using a simple acid-base titration as follows:

1. Place a 25 ml sample into a clean beaker.

2. Add 3 to 5 drops phenolphthalein indicator.

3. Titrate with 0.1 N Na OH from clear to pink. 4

. mis required X 1.0 = % by volume.