Unibond SBR
Unibond (SBR) is a modified styrene-butadiene liquid emulsion that works as a ready-to-use bonding agent for repairing spalled concrete floors, columns, beams, and slabs. Its bonding capabilities also work well when bonding old concrete and mortar to new layers of concrete and mortar.
In addition to this, Magicrete Unibond SBR also works great as a waterproofing agent for bathrooms, roofs, underground concrete tanks, walkways, and small terraces by providing a damp-resistant, anti-carbonation coating to the structures. Other use areas for UWB are:
-It can be used as an additive in injection grouting for cracks and fissures
-It works as a great anti-corrosive coating on steel structures
-Ensures long-lasting and waterproof coating when used with cement paint
-Reduces shrinkage resulting in the prevention of cracking, dust build-up, and improvement in abrasion resistance
-It works as a great bonding agent for tiles and panels
-As a top finishing for chemical resistant floors
-Is a great fixing agent for slip bricks, tiles, and marble bedding
Features
Anti- Erosion/Corrosion
UWB has a first of its kind built in, intrinsic corrosion inhibitor technology which aids in it becoming resistant to erosion and corrosion
Multipurpose and Cost-effective
It is a multipurpose product that has a straightforward application method and is cost-effective
Durable
Enhances the durability and strength aspects of the cementitious system, enabling it to be applied in thin, refined layers.
Non-Crack Forming
Averts crack formation by enhancing its ability to bend, hence increases flexural strength. It furthermore curtails shrinkage cracks related to drying and aging
Anti-Hydrolysis Agent
Does not breakdown when it comes in contact with water molecules, hence it is immune to hydrolysis. Due to this quality, it can be used for external applications
Tough/ Resilient
It has increased resilient properties, while also increasing the toughness and hardness of cementitious film or mortar. It further prevents the generation of dust
Technical Specification
| PARAMETERS | SPECIFICATIONS |
|---|---|
| Appearance | SBR Latex |
| Specific Gravity at 250C | 1.01 +/- 0.02 |
| pH Value | 7 - 9 |
| Pot Life | 30 - 45 mins at 30o C |
| Chemical Resistance | Resists to mild acids, alkalies, sulphates |
| Freeze Resistance | Excellent Resistance |
| Shelf Life | 24 months in the original packaging |
Knowledge Base
FAQs
Magicrete Unibond SBR: Multipurpose Styrene-Butadiene Liquid Emulsion
Magicrete Unibond SBR is an advanced, ready-to-use styrene-butadiene rubber (SBR) liquid emulsion engineered for multi-purpose structural applications. It acts as an exceptional bonding agent for uniting old and new concrete, a robust repair mortar additive for spalled columns and beams, and an impermeable waterproofing coating for underground tanks, roofs, and wet areas. Featuring built-in intrinsic corrosion inhibitors and anti-hydrolysis properties, it radically enhances the flexural strength, abrasion resistance, and chemical endurance of any cementitious system.
The Financial Impact on Your BOQ (Bill of Quantities)
Specifying a high-grade, multipurpose SBR emulsion directly optimizes structural rehabilitation budgets and dramatically extends the lifecycle of concrete assets:
- Structural Asset Recovery: Instead of executing costly demolitions, Unibond SBR allows for the structural repair of severely spalled concrete columns, beams, and floors. By increasing the toughness of thin-layer cementitious patches, it restores structural integrity at a fraction of the replacement cost.
- Corrosion & Liability Prevention: The emulsion acts as a formidable anti-carbonation and weather-resistant barrier. It actively prevents chlorides, mild acids, and moisture from penetrating the concrete and attacking the internal steel, completely neutralizing massive long-term spalling and oxidation liabilities.
- Inventory & Procurement Optimization: Because this single product functions simultaneously as a structural bonding agent, a waterproofing coating, a tile-fixing additive, and an injection grouting viscosity reducer, it drastically cuts down the number of specialized chemical SKUs required on-site.
Mandatory Site Execution Guidelines
To achieve maximum bonding strength and ensure absolute waterproofing performance, site execution teams must strictly adhere to these application protocols:
- Substrate Decontamination: Whether applying a bond coat or a repair mortar, the existing concrete surface must be structurally sound and rigorously cleaned of all laitance, dust, oil, and curing compounds. The substrate must be pre-wetted to a saturated surface dry (SSD) condition before application.
- Strict Pot Life Management: Once Unibond SBR is mixed with cement (as a bonding slurry) or cement/sand (as a repair mortar), the chemical reaction dictates a strict pot life of just 30 to 45 minutes at 30°C. Site crews must only prepare micro-batches that can be placed and finished within this window.
- Wet-on-Wet Bonding Protocol: When used as a bonding agent to unite old and new concrete, the new concrete or repair mortar must be poured or applied while the SBR bonding slurry is still tacky. If the bond coat dries before the new concrete is placed, it will act as a debonding layer and fail.
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