Gravity Vinyl Ester Knife Grade

Gravity Vinyl Ester Knife Grade — Extra-Clear, Ultra-Fast Stone Adhesive for Professional Bonding & Lamination

Gravity Vinyl Ester Knife Grade is a high-performance, extra-clear paste adhesive engineered for ultra-strong, fast-curing bonding and lamination of marble, granite, quartz, ceramic, and other hard surfaces. Formulated as a solid vinyl ester glue with a knife-grade consistency, it is designed for professional shop and jobsite use where visible joints demand both structural integrity and aesthetic quality. Its extra-clear, glossy finish makes it ideal for high-visibility seams and lamination work. The product is for professional use only and is available in 1 Quart, 1 Gallon, and 5 Gallon sizes to suit projects of any scale.

Technical Specifications

Adhesion Strength

Approximate Coverage Rates

Gravity's vinyl ester chemistry delivers a combination of extreme bond strength, ultra-fast gel time, and true extra-clear transparency that polyester-based alternatives typically cannot match for visible joint applications. Its resistance to both freeze and heat conditions, combined with excellent UV stability, makes it suitable for both interior and exterior installations where long-term color and structural performance are required. The knife-grade consistency provides superior vertical hold and precise application control compared to liquid-grade adhesives.

Key Features & Benefits

Extra-Strong Bonding

Gravity provides a powerful, durable bond across a wide range of hard surface materials. With a measured adhesion strength of 13.0 MPa on ceramic, contractors can rely on this adhesive for structurally demanding applications where joint failure is not an option.

Ultra-Fast Cure Time

With a gel time of 3.30–4.30 minutes in mass and a workability window of 25–40 minutes at 25°C, Gravity allows for rapid project turnaround without sacrificing open time for proper positioning. Faster cure cycles mean less downtime between fabrication steps on the shop floor or jobsite.

Extra-Clear, Glossy Finish

The extra-clear, transparent paste formula is specifically engineered for visible joints where aesthetics matter. Once cured, the adhesive delivers a smooth, glossy surface that enhances the natural appearance of stone and tile installations.

UV Stability

Gravity is rated for excellent stability to sunlight, meaning the bond line will not yellow or degrade in color when exposed to UV radiation over time. This makes it a reliable choice for exterior applications or interior spaces with significant natural light exposure.

Freeze & Heat Resistance

The adhesive is formulated to perform reliably across extreme temperature ranges, making it suitable for both indoor and outdoor installations. Contractors working in variable climate conditions can trust Gravity to maintain bond integrity without seasonal failure.

Sandable and Polishable

Once fully cured, Gravity can be sanded and polished to achieve a flawless, seamless finish that matches the surrounding stone surface. This is critical for countertop fabricators and installers who require invisible seams on finished work.

Common Applications

Countertop Seaming

Gravity's extra-clear formula and smooth, glossy finish make it ideal for seaming marble, granite, and quartz countertops where joint visibility must be minimized.

Stone Lamination

The adhesive is designed for lamination of hard surface materials, providing the bond strength and coverage needed to laminate stone edges and build-ups in fabrication shops.

Tile and Ceramic Bonding

With a documented adhesion strength of 13.0 MPa on ceramic, Gravity is well-suited for bonding ceramic tiles in both structural and decorative applications.

Grouting and Joint Filling

Gravity can be used for grouting applications, covering approximately 20–30 linear meters per unit, making it practical for filling and finishing joints in stone and tile installations.

Outdoor and Exterior Installations

Its resistance to freeze, heat, and UV degradation makes Gravity a dependable choice for exterior stone cladding, outdoor countertops, and other applications exposed to the elements.

Visible Joint Applications

The extra-clear, high-wet-effect formula is specifically suited for high-visibility areas where the adhesive line must be virtually invisible after curing and polishing.

Compatible Materials

• Marble
• Granite
• Quartz
• Ceramic
• Other hard surfaces

Product Documents

• Safety Data Sheet
• Technical Data Sheet

Application Instructions

Surface Preparation

1. Ensure the surface to be bonded is clean, dry, and free of dust, grease, or contaminants.
2. When treating a surface for the first time, evaluate adhesion on a sample or hidden corner before full application.

Mixing

1. Remove the desired quantity of product from the container and weigh it.
2. If color matching is required, add color paste, liquid dyes, or metal oxides at this stage — before adding the catalyst.
3. Add 1–3% catalyst (hardener) by weight to the measured adhesive.
4. Mix thoroughly using clean tools until the catalyst is fully incorporated.
5. Do not return unused mixed adhesive to the original container.

Application

1. Apply the mixed adhesive to the desired surface using a spatula or appropriate tool.
2. Spread evenly and position materials within the workability window (25–40 minutes at 25°C).
3. Allow to cure fully before sanding or polishing.

Cleanup and Storage

1. Clean tools soiled with adhesive using non-greasy solvents such as Acetone or Butyl Acetate. Use appropriate PPE when handling solvents.
2. Close containers with their original caps after use.
3. Avoid prolonged contact of the product with air.
4. Store away from heat, humidity, and direct sunlight at 20–25°C.

Safety Data Summary

Personal Protective Equipment

• Use necessary PPE when handling the adhesive and when cleaning tools with solvents such as Acetone or Butyl Acetate.

Safe Handling

• Read the technical and safety data sheet carefully before use.
• For professional use only.
• Do not return mixed product to the original container.
• Avoid prolonged contact with air.
• Close containers with original caps after use.
• Store away from heat, humidity, and direct sunlight at 20–25°C in original, unopened containers.
• When cleaning tools, use non-greasy solvents (e.g., Acetone or Butyl Acetate) with appropriate PPE.
• When treating a surface for the first time, test on a sample or hidden area before full application.

Frequently Asked Questions

Q: Can Gravity be used on wet surfaces?
A: No. The technical data sheet specifies that Gravity does not adhere to wet surfaces. Surfaces must be clean and dry prior to application.

Q: How do I add color to the adhesive?
A: Add liquid dyes, color paste, or metal oxides to the measured adhesive before adding the catalyst. Do not add colorants after the hardener has been introduced.

Q: What is the shelf life of Gravity?
A: At least 12 months when stored in original, unopened containers at 20–25°C, away from heat, humidity, and direct sunlight.

Q: Can the cured adhesive be sanded and polished?
A: Yes. Once fully cured, Gravity can be sanded and polished to achieve a seamless, flawless finish that matches the surrounding stone surface.

Q: What catalyst ratio should be used?
A: Add 1–3% catalyst by weight relative to the amount of adhesive being used. Always weigh the adhesive before adding the hardener and mix thoroughly with clean tools.

Q: Is Gravity suitable for outdoor use?
A: Yes. Its resistance to freeze, heat, and UV degradation — rated as excellent stability to sunlight — makes it suitable for both indoor and outdoor applications.