Dow 1205 Primer

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Description for Dow 1205 Primer

Air drying primer supplied as a solution of reactive materials in a solvent.

Note: This material has been discontinued. Please view the Comparable Materials tab or call us at (262) 293-7970 for additional help.

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Application Type	Coating, Primer
1 Part or 2 Part	1-Part
Material Form	Liquid
Substrate	Ceramics, Composites, Composites, Plastics, Silicone
Manufacturer	Dow
Chemistry	Mixture
Cure Method	Solvent, Moisture, Air drying
Cure Temperature (°C)	20 to 25
Cure Time (min)	60 to 120
Color	Clear / Transparent

Best Practices for Dow 1205 Primer

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Technical Data for Dow 1205 Primer

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Overview

Application Type
- Coating
- Primer
1 Part or 2 Part
- 1-Part
Material Form
- Liquid
Substrate
- Ceramic - Ceramics
- Plastic - Composites, Plastics, Silicone
- Composites
Industry
- Construction - Masonry
Chemistry
- Other - Mixture
Application Method
- Brush - Wiping
- Spray
- Dip
Cure Method
- Room Temperature / Air Dry - Air drying
- Solvent
- Moisture / Condensation Cure - Moisture
Color
- Clear / Transparent

Specifications

Cure Specs

Cure Temperature (°C)	20 to 25
Cure Time (min)	60 to 120

Other Properties

Flash Point (°F)	41.0, 55.4

Business Information

Shelf Life Details	Dow Corning 1205 Prime Coat has a shelf life of 12 months from date of manufacture. Refer to product packaging for “Use By” date. For best results, store below 32°C (90°F). Containers should be kept tightly closed when not in use. After use, any remaining primer should be returned to a sealable container as soon as possible for storage., Shelf life is indicated by the “Use Before” date found on the product label. For best results, Dow Corning primers, prime coats and adhesion promoters should be stored below 32°C (90°F). Special precautions must be taken to prevent moisture from contacting these materials before use. Containers should be kept tightly closed and head or air space minimized. Partially filled containers should be purged with dry air or other gases such as nitrogen to maximize shelf life. Small amounts for immediate use should be poured into clean, dry containers and discarded when finished., Material should not be used once it takes on a milky appearance or a large amount of white precipitate is observed, indicating moisture contamination. Repeated opening of the container can cause a small amount of white precipitate to form inside the container cap area, which does not affect the bulk material.
Shelf Life Type	from date of manufacture
Shelf Life (mon)	12

Best Practices for Dow 1205 Primer

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1. Surface Preparation
  
  Thoroughly clean all surfaces of dust, dirt, tar, oils and other debris. Remove rust from metal surfaces and scale by abrasive cleaning or wire brushing. Masonry surfaces should also be wire brushed and blown with compressed air to remove dust.
  
  Thoroughly clean and degrease all surfaces with an industrial solvent such as IPA (isopropyl alcohol), naphtha, mineral spirits, xylene, toluene or MEK on a clean, oil-free rag.
  
  The active ingredients must thoroughly wet-out and coat the bonding surfaces. Mild abrasion, solvent cleaning, plasma, corona discharge and other pre-treatments have been used to clean and enhance surface reactivity to bonding. In general, light surface abrasion is recommended whenever possible, because it promotes good cleaning and increases the surface area for bonding. Surfaces should be cleaned and/or degreased with Dow Corning ® brand OS Fluids, naphtha, mineral spirits, methyl ethyl ketone (MEK) or other suitable solvents that will remove oils and other contaminants that may be present. A final surface wipe with acetone or IPA may also be helpful. Different cleaning techniques may give better results than others. Users should determine the best technique for their applications.
2. Application
  
  Apply Dow Corning 1205 Prime Coat to clean, dry surfaces by dipping, brushing or spraying. A coverage rate of about 400 ft2/gal (9.8 m2/L) is recommended on rough or porous substrates. On smooth metal or plastic surfaces, a coverage of 800 ft2/gal (19.6 m2/L) is possible.
  
  These products should be applied in a very light, even coat by wiping, dipping or spraying. Excess material should be wiped off to avoid over-application, which generally appears as a white, chalky surface. When dip or spray coating, diluting by a factor of 2 to 4 with additional solvent may avoid excessive build-up.
3. Curing
  
  Allow the primer to dry and react with the surface for at least 15minutes. The exact time required depends upon temperature, humidity and the porosity of the substrate. It is the user’s responsibility to determine adequate primer dry times for specific applications.
  
  These products require moisture in the air to cure, and are generally cured at room temperature and in a range of 20 to 90 percent relative humidity for 1 to 2 hours. Low humidity and/or low temperature conditions require longer cure times. Mild heat acceleration of the cure rate may be possible but temperatures above 60°C (140°F) are not recommended. During application, the carrier solvent typically evaporates off quickly (except in the case of Dow Corning 1593 Cleaner/Primer, where the solvent does not evaporate at all), allowing the active ingredients to begin to react with atmospheric moisture and bonding surfaces. For optimal bonding, different cure times may be required for different temperature and humidity conditions. Users should determine the best cure schedule and conditions for their applications. The desired silicone elastomer should be applied after the primer, prime coat or adhesion promoter has fully cured.
Comparable Materials for Dow 1205 Primer

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Spec Engine^® Results
- Cho-Shield 1091 Primer(Parker Chomerics)
  An air-drying liquid coating for enhancing the adhesion of Cho-Shield 2000 series electrically conductive coating and Cho-Bond 2165 to chemically treated aluminum, and most composite surfaces.
- Chemlok 459M Primer(Parker Lord)
  Primer, designed for promoting adhesion to thermoplastic elastomers (TPE), thermoplastic polyolefins (TPO) and EPDM.
- HV 1860/023(Dow)
  Suitable for bonding high temperature peroxide cured silicone rubbers; remains active over several hours after application.
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