SikaFlow 647 is a structural-grade, two-component epoxy grout designed for demanding maintenance and repair applications. With a low-viscosity formulation, it flows easily into tight cracks, voids, and confined spaces, making it an excellent choice for injection or gravity feed repairs. Its strong adhesion to steel and concrete — whether the substrate is dry, damp, or contaminated with oil — ensures dependable performance in less-than-ideal field conditions. This epoxy grout cures quickly and achieves high compressive strength, providing long-term support under machinery and structural components exposed to vibration, dynamic loads, or chemical exposure. Whether used for crack injection, baseplate grouting, or epoxy mortar applications, SikaFlow 647 delivers reliable, high-performance results in industrial environments where precision and durability matter.
Key Features of SikaFlow 647
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- High Bond Strength
Bonds effectively to wet, dry, and oil-contaminated concrete and steel without compromising structural integrity. - Low Viscosity for Deep Penetration
Easily flows into fine cracks and tight spaces, making it effective for injection or gravity-fed applications. - High Compressive Strength
Reaches up to 15,000 psi (103 MPa) in epoxy mortar form at 28 days, suitable for sustained loads. - Versatile Application
Can be used for baseplate grouting, crack repair, precast pile bonding, or as a binder for epoxy mortar. - Cold Weather Tolerant
Usable down to 55°F with an optional accelerator for faster curing in colder conditions. - VOC Compliant and Solvent-Free
Meets environmental regulations without sacrificing performance or ease of handling.
- High Bond Strength
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Recommended Uses for SikaFlow 647
SikaFlow 647 is best suited for industrial and structural settings requiring strong adhesion, minimal downtime, and precision repair under difficult conditions.
Applications include:
- Grouting baseplates under rotating or vibrating equipment
- Pressure injection into voids and cracks in foundations
- Epoxy mortar repair for damaged concrete
- Bonding of post-tensioned beams or precast piles
- Sealing under machinery subject to chemical or thermal exposure
- Thin-bed repairs in high-traffic areas
Frequently Asked Questions
Can SikaFlow 647 be used in damp or oily environments?
Yes. It bonds to damp and oil-contaminated concrete surfaces, making it ideal for less-than-perfect jobsite conditions.
What’s the mix ratio for SikaFlow 647?
The mix ratio is 1.5 parts A (resin) to 1 part B (hardener) by volume.
Can I extend this epoxy to create a mortar?
Yes. Mix a full unit with 120 lbs of Sikalastic-941 oven-dried aggregate for epoxy mortar applications.
Is SikaFlow 647 the same as MFlow 647?
Yes. SikaFlow 647 was formerly branded as MFlow 647.
What is the working time of it at different temperatures?
At 75°F, working time is approximately 20–30 minutes. Cooler conditions extend working time, while higher temperatures shorten it.
Can SikaFlow 647 be used in underwater applications?
No. It is moisture-tolerant but not designed for submerged repairs.
