GacoFlex SF2000 SeamSeal is a silicone-based, solvent-free, single-component waterproof
elastomeric moisture-curing sealant combined with a reinforcing agent.
SeamSeal is intended for application over cleaned and primed roofs as a joint and fastener
treatment in place of fabric and/or elastomeric sheet tape. It may also be used to repair blisters in
spray polyurethane foam up to 4” in diameter, as a tape-seal over cracked polyurethane foam
insulation, and as filler for applications over existing “alligatored” smooth BUR. SeamSeal is UV
stable and may be used to repair most clean and dry roofing surfaces. It can also serve as a
substitute for caulk on a variety of substrates.
Apply by brush, trowel, piping bag or roller as received. For application utilizing equipment
contact Gaco Western. For cold weather application, keep material stored above 65°F (18°C). Do
not apply if rain is expected within 1 hour. For application in temperatures below freezing or
above 120°F (49°C) contact Gaco Western.
- Apply SeamSeal on all metal seams, joints, fasteners and penetrations at 75 to 100
linear feet of seams per gallon or 450 fasteners per gallon.
- Coat all surfaces including expansion joint covers and flashings. Extra material is
required at all edges and penetrations if neoprene sheet flashing is not used.
NOTE: Application rate is job-specific. Additional material may be required due to surface profile,
losses due to overspray and wind, and residual coating left in the container.