Jeffco Fuel Tank Sealer

General Description

Jeffco is an 2-part grey epoxy with excellent fuel-resistance properties.  It is optional on the Velocity, but many builders choose to use it as getting the fuel strakes sealed without it can be challenging.

Velocity Use

The surface should be prepared by roughing up with sandpaper and wiped down with denatured alcohol.  Mix 2:1 by volume, and add in a small amount of Cabosil to thicken.  Paint on with a brush, and continue to pull the mixture up any vertical surfaces to maintain thickness.  Watch for pin holes appearing, and continue to work epoxy over these areas until pinholes don't appear anymore.  Note that you will get it on yourself, and it will ruin whatever you're wearing, so plan accordingly.  Also, try to keep it off of yourself, this is one of the few materials in the kit that gives me a rash.

Product Description

Jeffco 9700-FCR is a high quality epoxy novolac coating system with chemical, high temperature, and abrasion resistance superior to Bis-A type epoxy resins.  This tightly crosslinked system cures in the presence of moisture and humidity with excellent mechanical properties.  It contains no solvents (100% solids, zero VOC) or carcinogens and has minimal odor and toxicity that assures ease of application. 9700FCR’s viscosity is well suited for vertical applications.  Jeffco 9700FCR is typically stocked in gray and ships DOT non-corrosive.

APPLICATIONS: - Tank Lining - Secondary Containment Coating - Floor Coatings

Product Specifications

PROPERTIES OF sp9700FCR SYSTEM LIQUID PROPERTIES (77ºF):	Minimum	Maximum
Resin Viscosity (Part "A")
Hardener Viscosity (Part "B")
Mixed Viscosity
Mix Ratio , Part	2 :1	2 :1
Pot Life, minutes @ 77ºF	25	30

Solids by Volume 100% Volatile Organic Content (VOC) 0 lbs./gal Application Temperature 55°F minimum, 100°F max Maximum Re-coat Time @ 77°F 24 hours Dry To Touch @ 77°F 8 hours Light Traffic @ 77°F 14-16 hours Full Cure @ 77°F 7 Days

Packaging Weights

1 gallon, 3 gallon, 15 gallon, 165 gallon

Directions for Use

SUGGESTIONS FOR USE: Follow general surface preparation and application procedures specified in ACI 503.1-4. Do not apply to concrete less than 30 days old. Do not apply to concrete with curing or sealing membranes. Do not apply to substrates at a temperature less than 50°F.

SURFACE PREPARATION: Substrate surfaces must be structurally sound and free from contaminants such as dust, oil or dirt.  Surfaces must be shot blasted or mechanically abraded to achieve a minimum 5-mil profile.  Coated surfaces must be mechanically cleaned and abraded with 60-80-mesh.  A calcium chloride “dome” test is recommended and hydrostatic pressure must be <5 psi before epoxy coating application.  Free-standing water must be removed.  Do not apply over old epoxies or other previously applied coatings.

Thorough and complete mixing is critical, a Jiffy mixer is recommended.  First mix each component separately.  Proportion each component at the ratio of 2 parts A (resin) to 1 part B (hardener) by volume or, if using 1-gallon kits, pour all of Part B (hardener) into Part A (resin) and mix at 400-600 RPM for 3-5 minutes.  Use an up and down motion, scraping the mixing container sides and bottom.  Mix no more material than may be applied in 20 minutes.

PRIMING: Best results are obtained using Jeffco 1500 series H20 based epoxy primers first.  1500 series primers should be applied at a rate of 250 - 300 sq.ft. per gallon.

FLOOR COATINGS: 9700FCR is an excellent bonding, medium viscosity, chemically resistant protective floor coating.  It is a thixotropic, moisture insensitive coating that can be applied by roller, brush, or squeegee.  This allows 9700FCR to be used in vertical applications. It will not crater or blush, drying to a high gloss.  Also makes a great floor coating that will protect concrete in areas were high concentrations of chemicals are used.  Jeffco polyethylene beads or other non-skid material may be broadcasted into 9700FCR to achieve a non-slip surface.

Typical Mechanical Properties

CURED PHYSICAL PROPERTIES OF NEAT RESIN:
NEAT RESIN CURED PROPERTIES OF sp9700FCR SYSTEM:	Minimum	Maximum
Shore D Hardness	86	86
Tensile Strength	7,000	8,000
Flexural Strength	13,000	13,800
Compressive Strength	12,000	14,000
HDT, ºF	140	140
Elongation	3.2	3.2

Safety and Handling

Here are the MSDS for Jeffco 9700.  Note that it is a skin sensitizer, and you should avoid contact with your skin as much as possible (this is one epoxy that does give me a rash).  Also note that you will get it on your clothes, so wear somthing you don't mind ruining. Media:9700FCRA.pdf
Media:H9700FCRB.pdf