GacoFlex® E5320

Part A is slurry with soft settling characteristics. Part B is a viscous liquid. When combined, the resulting product becomes a creamy, easy spreading mixture. When properly mixed and applied, E5320 Primer should remain a translucent pink color in its cured state.

• Improves Top Coat Adhesion - Gacoflex e5320 is an excellent multi-purpose primer that improves the adhesion of gacoflex silicone coatings and other topcoats.
• May help prevent asphalt bleed-through.
• Masonry Block Filler - When combined with ordinary sand, gacoflex e5320 works great as a masonry block filler.
• Excellent Adhesion - Gacoflex e5320 offers excellent adhesion to most surfaces including metal roofs, metal flashing, single-ply membranes, and more.

This multi-purpose primer offers excellent adhesion to most surfaces, including metal roofs, metal flashings, existing elastomeric coatings, wood, masonry and single-ply membranes. GacoFlex E5320 improves the adhesion of GacoFlex roof coatings, and spray polyurethane foam, including GacoFlex F2733 GacoRoofFoam™, to approved substrates. It can also be used as a masonry block filler when combined with ordinary sand.

GacoFlex E5320 is a two-component water-based epoxy primer providing excellent adhesion to most surfaces, including metal roofs, metal flashings, existing elastomeric coatings, wood, masonry and single-ply membranes. GacoFlex E5320 improves the adhesion of GacoFlex roof coatings, and spray polyurethane foam, including GacoFlex F2733 GacoRoofFoam™, to approved substrates. It can also be used as a masonry block filler when combined with ordinary sand.

When used unreduced as a block filler, the coverage is 70 – 100 ft²/gal. When thinned with 0.13 gal clean water/1 gal of GacoFlex E5320 (Part A & B Combined) (0.5 L per 3.78 L) and applied to smooth concrete, the coverage is 200 – 250 ft² / gal.

NOTE: Actual coverage may be less due to surface profile, losses due to overspray and wind, and residual coating left in the container.

Thinning

Thinning is not normally required for roller application. When thinning is necessary to extend pot life for spraying, for application at cool temperatures, or to achieve recommended application rates, thin combined material 10% - 20% with clean water and mix thoroughly.

NOTE: Do not thin more than 20%.

Mixing

GacoFlex E5320 is a two-component material. Equal parts by volume of Part A and Part B must be properly combined per the following directions before application:

• Mix Part A well for 3 - 5 minutes. Mix Part B for 3 - 5 minutes.
• Pour Part B into a clean, empty pail. Pour Part A into the same pail. It will sink.
• Mix both for 3 - 5 minutes. The mixture will appear thin and light pink. Power mixing is recommended when combining more than 1 gal each of Part A and Part B.

Pot Life

Pot life after mixing is 1.5 hours at 75°F. The pot life will double at 55°F and 100°F, and pot life is reduced to approx. 45 minutes.

Application

The product may be applied by brush, roller, or spray. On smooth surfaces, use a 1/4 - 3/8 in (6 - 10 mm) nap roller or nylon brush. When applying E5320 as block filler for porous concrete, use a 1 - 1-1/4 in (25mm - 32mm) nap roller. If blow holes form as the primer dries, make a second pass with a relatively dry roller; allow 5 - 10 minutes between passes. Contact Technical Services for an application utilizing the equipment. Do not apply to surfaces that are below 50°F.

• Single Ply Membrane Roofs, Smooth-surfaced Modified Bitumen, Existing Elastomeric Coatings (Including GACOFLEX A4271 BLEEDTRAP™) And smooth concrete - Apply one coat at a rate of 1 gal / 600 – 800 ft² for a total Dry Film Thickness (DFT) of 1 - 2 mils. Do not over-apply. Spray application (i.e., a non-continuous dusting) is preferred to achieve the required coverage rate. Combined material must be thinned 20% with clean water to achieve this coverage rate.
• Metal Roof Decks - Apply one coat at a rate of 1 gal / 300 ft² for a DFT of 2 - 3 mils.
• For Direct Application To Granular Surfaces And Smooth Built-up Membranes - Apply one coat at a rate of 1 gal / 250 ft² for a DFT of 1 - 2 mils.

NOTE: For all applicable substrate types, the application rate is job-specific. Additional material may be required to meet the minimum DFT requirement.

Dry Time

Allow E5320 Primer to dry for a minimum of 6 hours before applying a GacoFlex coating. Dry time is dependent upon temperature and humidity. Apply GacoFlex topcoat within 72 hours. If E5320 is exposed for greater than 72 hours, please contact Technical Services for assistance.

NOTE: Where maximum solvent resistance is needed, apply two coats of E5320 a minimum of two hours apart and allow to cure for 48 hours (at a daily maximum temperature of 70°F or higher). For 60°F days, allow up to one week. Full dry time may be longer when there is poor air ventilation such as in tanks or enclosed reservoirs.

Clean up

Clean brushes and rollers with soap and water; a small amount of vinegar may be added to make clean-up easier. Late in the pot life or hot weather, clean-up is impractical and brushes and rollers should be disposed of. Clean spray equipment with water supplemented with a small amount of vinegar and recirculate through lines and guns until residual coating is removed.