Superior Fusion FV-5 Stone Adhesive Knife Grade

Superior Fusion FV-5 Stone Adhesive — Professional Knife Grade for Seaming, Mitering & Chip Repair

The Superior Fusion FV-5 is a high-performance stone adhesive engineered for professional fabricators working with natural stone, engineered quartz, sintered surfaces, and ultra-compact materials. It combines Vinyl Ester and Modified Acrylic adhesive technology to deliver a smooth paste consistency that is ideal for precision seaming, mitering, laminating, rodding, and chip repair. Designed for indoor applications, this adhesive is formulated specifically for dense substrates where bond integrity and color clarity are critical to finished work quality.

What sets FV-5 apart from conventional polyester adhesives is its enhanced color and clarity profile, enabling accurate color matching across a wide range of stone colors and substrate types. The Vinyl Ester chemistry provides superior chemical resistance and bond strength compared to standard acrylic or polyester alternatives, while the Modified Acrylic component accelerates cure and improves workability. With a gel time of 3–5 minutes and a full cure in 20–25 minutes, fabricators can maintain efficient workflows without sacrificing joint quality.

Key Features & Benefits

Vinyl Ester / Modified Acrylic Hybrid Technology

The dual-resin formulation combines the chemical resistance and tensile strength of Vinyl Ester with the fast-cure properties of Modified Acrylic. This means stronger bonds on dense, non-porous substrates like quartz and sintered stone where conventional polyester adhesives tend to underperform. Fabricators get a more reliable seam that holds under real-world conditions.

Smooth Paste (Knife Grade) Consistency

FV-5 features a smooth paste consistency similar to Superior Poly-Epoxy, making it easy to apply with a putty knife or trowel into tight seams and chip voids. The knife grade body reduces slump on vertical and angled surfaces, giving fabricators better control over placement and minimizing cleanup time.

Enhanced Color Clarity for Accurate Color Matching

The FV-5 formula is engineered for superior transparency and color neutrality, allowing tints and pigments to blend accurately with the substrate. This is critical when working with book-matched slabs or repairing chips in highly figured stone where color inconsistency is immediately visible.

Fast Gel and Cure Times

With a gel time of 3–5 minutes and cure in 20–25 minutes, FV-5 supports a fast-moving shop environment. Fabricators can move seamed pieces, demold laminations, or proceed with grinding and polishing without excessive downtime, directly improving throughput per shift.

Broad Substrate Compatibility

FV-5 is engineered to bond to natural stone, engineered quartz, sintered surfaces, and other ultra-compact materials — covering virtually the full range of countertop and cladding substrates in modern fabrication shops. One adhesive for multiple material types reduces inventory complexity and changeover time.

Low Mix Ratio for Precise Catalyst Control

The 1%–2% mix ratio gives fabricators fine control over working time and cure rate, allowing adjustments to ambient temperature conditions. A lower catalyst percentage extends open time slightly, which is useful for complex seams or large chip repairs requiring more manipulation before set.

Common Applications

Seaming

FV-5's smooth paste consistency and fast gel time make it well suited for countertop seaming operations, providing strong, color-matched joints that are nearly invisible after grinding and polishing.

Mitering

The adhesive's body holds miter joints in position during cure without excessive slump, which is essential when assembling waterfall edges or 45-degree corner joints on thick-format stone.

Laminating

FV-5 bonds laminated stone build-ups securely, providing the structural integrity needed for thick-edge profiles and multi-layer laminations on countertops and architectural panels.

Rodding

When embedding fiberglass or steel reinforcement rods into routed channels, FV-5 provides the fill consistency and bond strength needed to secure rods firmly without voids or delamination.

Chip Repair

The enhanced color clarity and smooth paste body allow fabricators to fill corner chips, edge dings, and surface voids with a color-matched repair that blends seamlessly after curing and polishing.

Sintered and Ultra-Compact Surface Bonding

Dense, low-porosity materials like sintered stone and ultra-compact surfaces are notoriously difficult to bond with conventional adhesives. The Vinyl Ester chemistry in FV-5 provides the surface adhesion necessary to achieve reliable bonds on these challenging substrates.

Compatible Materials

• Natural stone (granite, marble, quartzite, travertine, limestone)
• Engineered quartz (Silestone, Caesarstone, Cambria, and similar)
• Sintered stone (Dekton, Lapitec, and similar)
• Ultra-compact surfaces
• Other dense stone and mineral composite materials

Available Sizes

Product Documents

• Superior Fusion FV-5 Safety Data Sheet (SDS)

Technical Specifications

Safety Data Summary

Hazard Information

• Highly flammable liquid and vapor (Flammable Liquid Category 2)
• May be fatal if swallowed and enters airways (Aspiration Hazard Category 1)
• Causes skin irritation and may cause allergic skin reaction
• Causes serious eye irritation
• Harmful if inhaled; may cause respiratory irritation
• Suspected of causing genetic defects (Germ Cell Mutagenicity Category 2)
• Suspected of causing cancer (Carcinogenicity Category 2)
• May damage fertility or unborn child (Reproductive Toxicity Category 1B)
• Causes damage to central nervous system (single exposure)
• Causes damage to blood system, liver, nervous system, and respiratory tract through prolonged or repeated exposure
• Toxic to aquatic life (Acute Aquatic Toxicity Category 1)
• Signal Word: DANGER

Personal Protective Equipment

• Chemical-resistant protective gloves
• Eye protection / face shield
• Protective clothing covering skin
• Respiratory protection when used in enclosed or poorly ventilated areas

Safe Handling

• Keep away from heat, sparks, open flames, and hot surfaces — no smoking near product
• Use only outdoors or in a well-ventilated area
• Keep container tightly closed when not in use
• Ground and bond containers and receiving equipment to prevent static discharge
• Use explosion-proof electrical, ventilating, and lighting equipment
• Use only non-sparking tools
• Do not breathe vapors, mist, or spray
• Wash skin thoroughly after handling
• Do not eat, drink, or smoke when using this product
• Avoid release to the environment
• Store in a well-ventilated place and keep cool
• Dispose of contents and container per local/regional/national regulations
• In case of ingestion: do NOT induce vomiting — seek immediate medical aid
• In case of inhalation: remove to fresh air and keep at rest in a comfortable breathing position
• In case of eye contact: rinse cautiously with water for several minutes; seek medical attention if irritation persists
• Emergency: CHEMTREC 800-424-9300

Frequently Asked Questions

Q: What is the difference between FV-5 and FV-9?
A: FV-5 has a smooth paste consistency similar to Superior Poly-Epoxy, making it ideal for seams and chip repairs where a flowable fill is needed. FV-9 has a thicker knife grade consistency similar to Superior V-Max SV-9, better suited for applications requiring higher body and less flow on vertical or angled surfaces.

Q: Can FV-5 be used on Dekton or sintered stone?
A: Yes. FV-5 is specifically formulated for use on sintered and ultra-compact surfaces in addition to natural and engineered stone. The Vinyl Ester chemistry provides the adhesion required for dense, low-porosity substrates where conventional polyester adhesives often fail to achieve adequate bond strength.

Q: What catalyst ratio should I use to extend working time in warm conditions?
A: The recommended mix ratio is 1%–2%. In warmer ambient temperatures, using the lower end of the range (1%) will extend the gel time slightly, giving you more time to work the adhesive before it begins to set. In cooler conditions, moving toward 2% will accelerate the cure.

Q: How long before I can grind and polish a seam after applying FV-5?
A: Full cure is achieved in 20–25 minutes under normal conditions. After that time, the seam can be dressed, ground, and polished. Cooler temperatures may extend cure time; allow additional time before grinding if working in a cold shop environment.

Q: Is FV-5 suitable for outdoor applications?
A: No. FV-5 is specified for indoor use only. For outdoor installations or environments with prolonged UV exposure or moisture, consult Superior Stone Products for an appropriate exterior-rated adhesive alternative.

Q: What is the shelf life and how should FV-5 be stored?
A: FV-5 has a shelf life of one year from the date of manufacture. Store in a well-ventilated area, keep cool, and maintain the container tightly closed when not in use. Avoid storage near heat sources, open flames, or ignition sources due to the product's flammable classification.