SEALGUARD VFI-990 High Solids Silicone

Equipment

The coating can be applied to the surface with airless spray equipment, industrial paint brushes, or nap rollers. When spraying, use equipment equivalent to:

• Graco GH 933 or DutyMax GH 675DI are capable of 1.5-2.5 gpm and a minimum constant pressure of 5,000 psi. We also recommend spraying with Graco Xtreme-Duty ½-inch or ¾ inch hoses with ⅜ inch whip hoses and Graco XTR-7 Airless Spray Guns with minimum .030 sized tips. The Graco 5:1 Monarch Transfer Pump should be used with drums.
• WIWA HERKULES GX, model 333/075, produces a flow rate per cycle of 275 cm3 or 9.3 fl oz, a pressure ratio of 75:1, and max inbound air pressure of 6.5 bar or 94 psi.
• Hennes-Johnson Model 5320 Silicone sprayer with a trigger gun capable of providing 5,000 psi of constant pressure at 3 gpm with ¾ or ½ inch nylon lined hoses and a whip hose.

Surface Preparation

Remove dirt, leaves, debris, and other materials detrimental to adhesion with a broom. Use a pressure washer and VFI-1009 Cleaning Detergent to clean areas containing animal fats, oils, and grease. Rinse the surface and allow it to dry.

Gaps and seams should be tight and flush, and any additional repairs should be made. Tighten and replace loose or backed-out fasteners with oversized fasteners. VFI recommends applying a primer like VFI-#11 9:1 Epoxy Primer to the roof and SEALGUARD VFI-993 Silicone Flashing Grade on seams, penetrations, and protrusions before coating.

Mixing

Mix the coating until uniform before use. Mix times may vary depending on volume and mixing method.

Application Requirements

Apply VFI-990 over the prepared surface at a minimum rate of 1.5 gallons per square to create a monolithic layer on the roof. Check specifications for required wet and dry film thickness. VFI-990 should only be applied when the surface and ambient temperatures are between 40°F – 120°F and when existing and forecasted weather conditions permit quality application. Bring the material to a minimum of 65°F before use. Some substrates will need additional strength by applying the coating with polyester fabric reinforcement. The time between subsequent coats should not exceed 48 hours. Ensure the material is fully cured before applying a second coat. Wait 24-72 hours for the coating to fully cure before you allow limited foot traffic on approved walking areas.

Cleaning

Do not use water to clean application tools and equipment. If spraying, do not leave VFI-990 inside the spray equipment. It will cure with moisture and stick to hose walls and unsealed connections. Clean the pump equipment, spray guns, and hoses with chemically dry mineral spirits. Recirculate minerals spirits through the lines until the uncured coating is removed.

Storage/Shelf Life

The material shelf life is 12 months from the date of manufacture. Store in a dry, temperature-controlled space in sealed and unopened containers between 60°F – 90°F. Opened containers can be resealed with a nitrogen purge, but it will ultimately shorten the shelf life of the product.

Precautions

VFI-990 should not be applied if the temperature is below 40°F and decreasing or if rain and other moisture contaminations are present. Avoid breathing in vapors or repeated skin contact. Do not thin or add foreign material to the product. See Safety Data Sheet for complete safety data.