ROMEX® FLEX-JOINT
Flexible Resin Jointing
Ideal for parking lots & permeable pavers
The world’s first flexible and permeable jointing mortar is made from a combination of sand, rubber and visco elastic resin and is perfect for unbonded surfaces. This innovative product is a perfect replacement for loose grit and allows for regular pressure washing. Simply mix with water in a cement mixer or directly in the bucket with a drill mixer on smaller projects. FLEX JOINT is compatible with any joint width over 3/8″ | 8mm and is perfect for use on permeable pavers or control joints in bonded construction. Contact us regarding joints outside of the recommended width.
WEATHER WARNING – Only install at surface temperatures between 7°C – 30°C | 44.6°F – 86°F. Lower temperatures result in slower hardening while higher temperatures cure faster. 20-30 minute working time.

- Vehicle loading up to 25
- Ideal for unbonded construction
- Bonded performance on unbonded application
- Used in combination with our ISATec 5-year
- warranty displacement protection system

BENEFITS
INSTALL VIDEO
INSTALL STEPS
REQUIRED TOOLS
ROMEX Install Tool Kit – Contents:
- Coconut Broom (40 cm)
- Premium Industrial Broom (40 cm)
- Coconut Handbrush (28 cm)
- Metal Dustpan
- Strong Sponge Squeegee (45 cm)
- Hard Squeegee (45 cm)
- Mini Handheld Squeegee (20 cm)
- Safety Glasses
- Latex Gloves
- Tape
Other Tools:
- Gravity Mixer
- Wheel Barrow
Construction Site Preparation: Prepare the foundation considering expected traffic loads and adhere to regulations and guidelines for paving stone surfaces. Avoid settling or loose stones. Utilize the ROMEX® SYSTEM-GUARANTEE with ISATec anchors (RSG – 5) for optimal results and consider using ROMEX® application tools.
Joint Preparation: Clean joints to a depth of at least 30 mm | 1 1⁄4″ (or 2⁄3 of stone height for traffic loads, minimum joint width 5 mm | 1⁄4″). Clean the joint-fixed surface of all impurities before starting work. Tape off adjacent surfaces not to be joint-fixed.
Pre-wetting: Pre-wet the surface, especially for porous surfaces or higher temperatures, which require more intense pre-wetting.
Mixing: Open the bucket and bottles, pour contents into the filler material. Add 2.5 liters of water if used as a normal paving joint mortar; (no water needed if product is used in bonded construction as a control joint). Rinse resin/hardener bottles with 100 ml | 0.025 gal of water and add to the mixture. Mix for at least 6 minutes using a professional drill mixer with helical paddle or rotary-drum mixer
Application: Apply the mixed mortar onto the pre-wetted surface and work it into the joints using a squeegee/rubber squeegee. Pour mortar at several spots or in small doses within the jointing area to maximize fluidity. Clean tools and work shoes regularly during jointing to prevent impurities.
Final Cleaning: After approximately 10 minutes, carefully sweep excess mortar off the stone surface with a large, coarse broom. Then use a soft broom for final cleaning until all residual mortar is removed. Sweep diagonally to the joint and avoid reusing swept-off material.
Subsequent Treatment: Rain protection is unnecessary during short periods light drizzle. For permanent or heavy rain, protect the freshly jointed surface for 12-24 hours. Avoid direct placement of rain protection to ensure proper air circulation.
Important Note: Initially, a thin film of epoxy resin remains on the stone surface, enhancing color and protecting from dirt. This film is temporary and will diminish over time. Test a sample surface if uncertain before jointing. A resin film does not indicate an application fault, and surface quality is not compromised.
Gallery Images