GacoRoof Application Instructions
View the GacoRoof application DVD before beginning your deck. All surfaces must be dry and clean, without wax, dust, oil, asphalt coatings or contaminants. Do not apply GacoRoof if rain is expected.
Please note that Universal Colorants can not be used to tint GacoRoof. GacoRoof can be tinted gray using GacoRoof Colorant compound.
Figure A: Determine how much GacoRoof coating you will need. One gallon covers 100 square feet.
Figure B: In addition to GacoRoof coating, you may also need a 9” roller frame, a solvent-resistant 3/4” or 1” nap roller cover, a paddle for stirring, silicone caulk, GacoTape for transition areas, and mineral spirits for clean-up.
Figure C: Powerwash or scrub roof thoroughly before application.
Figure D: Repair all holes and cracks with silicone caulk.
Figure E: Bridge any gaps in your roof with Gaco RoofTape self-adhesive seam tape.
Figure F: Before application, stir coating thoroughly.
Figure G: Two coats are required. Apply each coat with parallel overlapping roller passes.
Figure H: Allow first coat to dry thoroughly (between 1 and 12 hours, depending on conditions) before applying second coat.
Figure J: Apply a second coat of GacoRoof coating in the same manner as the first coat.
Figure K: Your new GacoRoof is complete!
Figure L: GacoRoof Colorant can be applied to tint the standard bright white color of GacoRoof.
Surface Preparation
Remove all loose material and debris. Wash the roof, paying special attention to heavily soiled areas. The surface must be completely dry before applying GacoRoof. Caulk holes and cracks with silicone caulk; allow caulk to dry according to manufacturer’s instructions. Check flashings and transitions, then bridge openings (cracks, seams, laps, drains, skylights, scuppers, etc.) with Gaco RoofTape self-adhesive seam tape.
Where To Apply *
GacoRoof 100% Silicone Coating can be applied over the following roofing surfaces:
- Metal
- Tar & Gravel
- Cap Sheet
- Torchdown
- Composite
- Aged Asphalt
- Modified Bitumen
- Concrete
- Barrel Tile
- Sprayed Urethane Foam
- Low-Pitched Roofs
- Flat Roofs
- Mobile Homesv
- RV’s & Campers
- Built-Up Roofs
*Not recommended for application over 3-Tab mineral faced asphalt shingles, or over asphalt coatings.
A Note About Asphalt
An asphalt coating is different from aged asphalt. Aged asphalt refers to Built-Up Roofing (BUR), made up asphalt felts mopped to the roof substrate with hot liquid asphalt. Some volatile oils will be on the surface and with time disappear, i.e.; aged. GacoRoof coating will adhere to aged Built-Up Roofs.
Asphalt coatings include asphalt emulsion, (Water Base), aluminized and cut-back, (Solvent Base). These coatings are usually applied over older BUR roofs. None of these coatings have dependable long term adhesion to BUR and frequently chip or peel off after several years of service. It is the possibility of poor adhesion of these asphalt coatings that make them risky to coat with GacoRoof.
Application
Two coats are required. Before application, stir coating thoroughly. Use a solvent-resistant •'5f” or 1” nap roller cover to apply one gallon of GacoRoof per 100 square feet of roof. Allow the first coat to dry until it can be walked on – between 1 and 12 hours l. Apply second coat at one gallon per 100 square feet and allow the roof to dry. Keep container tightly closed between applications to minimize surface skinning. If surface skins, remove the skinned material from the container.
GacoRoof should not be applied in temperatures below freezing, or when rain is expected within 2 hours. For details and application tips, visit , or call our Helpline toll free at 1-866-422-6489
Clean Up
Clean equipment with mineral spirits. DO NOT use water. Dispose of GacoRoof coating in the proper manner.
Maintenance
Roof structures may settle over time. A periodic inspection of your roof, which includes transition areas, flashing, vents and skylights, is recommended. Do not recoat GacoRoof Silicone coating with acrylic, urethane, or Hypalon® coatings.
CAUTION: An old, neglected, or failing roof does not have the resilience to withstand the rigors of weather. GacoRoof may not be suitable for such a roof. If you are in doubt about the condition of your roof, consult a qualified roof inspector.
- GacoRoof is a white coating, which can be tinted to gray using GacoRoof Colorant.
- Use a solvent-resistant 3/4" or 1" nap roller cover.
- Apply between 32 degrees Fahrenheit and 120 degrees Fahrenheit.
- GacoRoof Gray Colorant can be added to the coating, which can then be applied as the base or top coat.
- Before applying second coat, check that first coat can be walked upon without sticking to shoes, and that the surface is free of debris.
- GacoRoof is not recommended for rooftop decks, GacoDeck Kit is ideal for surfaces which will receive a high volume of foot traffic.
- GacoRoof coating can only be coated with GacoRoof, other paints will not adhere to the silicone surface.
