Primer 700 is a high performance, two-component urethane primer system designed for use on concrete. By mixing in a 1:1 ratio by volume, bubble-free films can be produced up to 50 mil (1.3 mm) thick. Working times are adjustable by selective additions to the resin blend. It also exhibits a low sensitivity to substrate moisture, leaving a minimal bubbling when applied to damp surfaces.

Features:

  • Concrete and wood primer for polyurethane and polyurea spray coatings.
  • Industrial flooring, roofing, decking, truck bed liners, pipeline and tank coatings.
  • Penetrates and seals the surface, leaving a smooth, pinhole and bubble-free coating.
  • Excellent adhesion to a variety of substrates.
  • Outstanding stability at low temperatures.
  • Working at different volume ratios offers a variety of stiffness and flexibility.
  • Primer may be applied on damp surfaces with no bubbles or foaming.
  • Flexibility to adjust the cure profile to match customer processes with the adjustment of catalyst.
  • Long work times (up to 45 minutes)

Primer 700 is a two-component urethane primer designed for use on concrete, wood and other porous substrates in coating applications where a solvent based primer cannot be used.  Primer 700 is formulated to be used with fast cure (1 to 3 minute cure) plural application coatings over concrete; these are coatings which are spray applied through high pressure plural mixing/spraying equipment or the dual cartridge with static mixer type spray guns.  A solvent free primer must be used with very fast curing coatings to prevent bubbling as solvents evaporate from surface.  This primer should be allowed to full cure overnight before spray application of fast set coatings over it.  Use this primer over concrete surfaces when spraying Speedliner series coatings. It also exhibits a low sensitivity to substrate moisture, leaving minimal bubbling when applied to damp surfaces. Mix 1:1 ratio by volume, brush, roller or spray-on application. Primer 700 contains no VOC solvents and is classified as non-flammable material, see material safety information.  Primer 700 should not be used with our Speedliner 1000 spray-on truck bed liner product.

Application and Mix Ratio

Surface must be properly prepared prior to application. This could entail scrubbing, high pressure detergent washing, steam cleaning or solvent wiping of the surface to remove dirt, oil, grease, pollutants and other contaminants. Allow the surface to thoroughly dry. Once dry, remove loose or excess mortar or other material that may work to impair adhesion.

To prepare the system for application, mix the appropriate volume of materials together for approximately 2 minutes. At this point, a cloudy liquid will result which will eventually become clear and amber. Shortly thereafter, a slight exothermic will become noticeable and the mixture will increase in viscosity. The actual working time will depend on the temperature resin blend.

Material can be applied by brush, roller or low pressure spray equipment. Ensure product is applied in an even and uniform manner, making sure recesses and edges are thoroughly coated.

Properties

Working Properties

Mix Ratio By Weight

100 parts A/ 82 part B

Mix Ratio By Volume

100 parts A/ 100 parts B

Viscosity @ 72°F

45 CPS

Color

Clear Amber

Finish

Gloss

Pot Life @ 72°F

45 minutes

Dry Time @ 72°F

Tact Free:

4 hours

Recoat Time* @72°F

2-24 hours

*Cure time depends on temperature and relative humidity.

 

Physical Properties

Specific Gravity (Part A)

1.17

Specific Gravity (Part B)

0.96

Specific Gravity (Mixed)

1.06

Weight/Gallon Part A

9.74 lbs.

Weight/Gallon Part B

8.00 lbs.

Weight/Gallon Mixed

8.87 lbs.

Elongation

45%

Tensile Strength

ASTM D-412 die C

2400

Tear Strength

D-624 die C

200 lb./in.

Theoretical Coverage

1500 mil ft. /gal.

Recommended Thickness

3-5 mils.

Modulus of Elasticity

47900 psi

Polyurea Top Coat Adhesion (elcometer)

>500 psi

 

Clean Up

Dispose of all empty Primer 700 component containers in accordance with local, state and federal regulations. Empty component containers can be rendered non-hazardous by rinsing the containers with a small amount of mixed material and allowing the solvents to evaporate. The containers will then contain non-hazardous cured urethane.

Storage and Shelf Life

The reaction of isocyanates with water leads to the formation of insoluble ureas and carbon dioxide gas which can result in pressure buildup inside closed containers. Therefore, extreme care must be taken to assure containers used for Primer 700 dry. Freshly manufactured Primer 700 Component A is a brown liquid. Sedimentation is usually due to contamination from atmospheric moisture or to dimmer formation. The latter may occur on products with long storage times, typically over one year. Reaction from atmospheric moisture can be prevented by storing Primer 700 in carefully sealed containers under a dry nitrogen atmosphere. During handling, Primer 700 must also be protected from atmospheric moisture and water ingress, and containers must be carefully resealed after each sampling. Containers that have been contaminated with moisture should not be subsequently sealed; otherwise, a hazardous increase in pressure may result. Primer 700 is resistant to short-term exposure to low temperatures. However, low temperatures will result in increased viscosity, which makes handling more difficult. It is not advisable to store Primer 700 for long periods below 32º F (0ºC). The recommended storage temperature for Primer 700 is 60 to 95º F (16-35ºC). A small amount of finely divided insoluble solid in the liquid product does not usually cause difficulties in handling or product performance. However, if necessary, the liquid product may be filtered through a suitable in-line filter. It is suggested that the filter vessel be of stainless steel with a suitable polypropylene filter bag. The lines should be heated and brown clear with nitrogen after use.

Shipping

Shipping Class: Class 92.5 Hazardous