Project Reference: MasterSeal CR 435 - Joint Repair
Location: Seven Hills, MB Solutions Australia
Market sector: Sealants
Products used: MasterSeal CR 435 high performance chemically resistant polyurea hybrid joint sealant
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The Background
A joint between two slabs (one sloping) had opened up over time and the joint had become contaminated with dirt and debris. The exposed edges of the joint were showing signs of damage. The immediate needs were to stop further deterioration and seal the joint.
The Challenge
The affected driveway was in use from morning to night and there was little availability to stop the passage of trucks and forklifts. The joint needed to be resealed during working hours and not disrupt the activities on site. The material needed to be suitable for the abrasion of all types of vehicles including cars, utility vehicles, delivery vans, B doubles and hard wheeled forklift traffic.
Our Solution
The MasterSeal CR 435 joint sealant had some unique characteristics that made it perfect for this application. It had high Shore A hardness making it abrasion-resistant. It also had fast cure allowing return to service in minutes, rather than hours or days. It was self-priming so minimal preparation was required. All that was needed was to clean the joint and install a backer rod to give the right joint thickness. This allowed the joint sealant to move with the expansion and contraction of the slabs.
Project Facts at a Glance
- The movement joint needed repair without stopping traffic.
- Trucks and forklifts crossing the joint in less than 15 minutes of the application
- Minimum joint preparation required
Product Facts at a Glance
- A two-component, chemically curing, hybrid polyurea sealant
- MasterSeal CR 435 exhibits high chemical resistance, moisture insensitivity during curing and is UV resistant, resulting in good durability
- UV stable polyurea technology - non-staining, non-yellowing, non chalking for use internally and externally
- Fast-curing properties - allows return to service after one hour at 20ºC
The Customer's Benefit
- Shore A hardness of 80MPa – giving long term durability and abrasion resistance.
- Gel time of approximately 4 minutes – fast hardening allowing for a return to service within 15 minutes, almost no disruption to normal operations.
- Twin cartridge – part used cartridges can be kept for the next job. Only the static mixer was discarded- no wastage.
- Concrete grey colour of the cured sealant – blends in with the concrete.
- UV stable – suitable for internal and external use. The sealant will not crack or disintegrate under exposure.
Traffic moved over the joint within 15 minutes of application
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