Costra Block Adhesives
High-Strength Bonding Solutions for AAC, Concrete, and Cement Blocks
In the ever-evolving construction industry, efficiency, strength, and precision are non-negotiable. Costra Block Adhesives are formulated to meet these demands with superior bonding performance, fast setting time, and enhanced workability. Whether you’re constructing residential buildings, commercial spaces, or industrial structures, our block adhesive delivers unmatched quality and reliability.
Designed especially for AAC blocks, concrete blocks, cement blocks, and fly ash bricks, Costra Block Adhesives ensure a robust bond between masonry units. The result? Stronger walls, reduced material wastage, faster construction timelines, and long-lasting durability.
What is Costra Block Adhesive?
Costra Block Adhesive is a polymer-modified, cement-based adhesive specially developed for block masonry work. Unlike traditional mortar, which requires sand and cement mixing, our ready-mix formula eliminates the need for onsite blending. This not only saves time but also ensures consistency in every batch.
It offers high bonding strength, smooth application, and minimal shrinkage—making it ideal for both interior and exterior block wall installations.
Key Features & Benefits
✅ High Bonding Strength
Costra Block Adhesive forms a strong chemical bond between blocks, ensuring structural integrity and stability. It reduces the chances of cracks, seepage, and joint failures.
✅ Ready-to-Use Formula
No need for mixing sand or cement separately. Just add water as per instructions, and the product is ready to apply.
✅ Fast Setting Time
With a quick setting formulation, this adhesive speeds up the construction process, reducing labor time and project delays.
✅ Consistent Quality
Every bag is quality-checked to deliver consistent composition and performance across multiple job sites.
✅ Thin Joint Application
Requires only 3–5 mm joint thickness, compared to 10–12 mm in traditional mortar. This reduces dead load and increases overall strength.
✅ Less Material Wastage
Precision mixing and easy handling minimize wastage and lower material consumption per square meter.
✅ Better Finish
Uniform joints lead to a smoother wall surface, reducing the need for extra plastering or surface corrections.
✅ Water-Resistant & Shrink-Resistant
Offers superior resistance to water seepage, weather fluctuations, and shrinkage cracks.
Recommended Applications
Costra Block Adhesives are suitable for a wide range of block masonry projects including:
- AAC block masonry for walls and partitions
- Fly ash brick wall installations
- Concrete and cement block construction
- Interior and exterior block wall bonding
- High-rise building construction
- Residential and commercial complexes
- Institutional and industrial structures
Technical Specifications
- Base Material: Cement-based with polymer additives
- Appearance: Grey powder
- Mixing Ratio: ~2.5 to 3 parts powder to 1 part water
- Open Time: 20–30 minutes
- Pot Life: 2–3 hours
- Compressive Strength: >7 MPa (28 days)
- Coverage: Approx. 4–5 kg per m² depending on block size and joint thickness
- Recommended Joint Thickness: 3–5 mm
Packaging & Storage
- Available Packaging: 40 kg moisture-resistant bags
- Storage Instructions: Store in a cool, dry place away from direct sunlight
- Shelf Life: 12 months from date of manufacture when stored properly in sealed packaging
Costra vs Traditional Mortar
| Feature | Traditional Mortar | Costra Block Adhesive |
|---|---|---|
| Joint Thickness | 10–12 mm | 3–5 mm |
| On-site Mixing Required | Yes | No |
| Material Wastage | High | Low |
| Application Time | Slow | Fast |
| Bond Strength | Moderate | High |
| Surface Finish | Uneven | Smooth |
By switching from conventional mortar to Costra Block Adhesive, contractors and site engineers can reduce construction time by up to 30%, lower labor costs, and achieve a cleaner and more reliable outcome.
Environmental & Safety Compliance
Costra Block Adhesives are developed with a focus on sustainability and site safety. Our adhesives are low in VOC (Volatile Organic Compounds) and environmentally safe for workers and occupants alike. Dust generation is minimal, and the product is non-toxic and non-corrosive.
Dealer & Contractor Support
Costra is committed to supporting its dealers, distributors, and on-site construction professionals with:
- Technical training and guidance
- Application demos
- Marketing materials
- Attractive dealer margins
- On-time supply logistics
If you’re a construction chemical distributor, building material dealer, or contractor looking for a reliable block adhesive brand in India, Costra offers trusted performance and a partnership you can count on.
Why Choose Costra Block Adhesives?
✅ Proven Performance on Major Sites
✅ Trusted by Leading Contractors Across India
✅ Fast-Moving Product with High Dealer Margins
✅ Backed by Advanced R&D and Quality Control
✅ Available Across Major Markets in India
