About This Product
Description
Polyflame EJB is a high-performance, compressible bitumen-impregnated fibreboard specially engineered for expansion joints in civil and structural construction. The product is manufactured from natural wood fibre chips combined with proprietary binding materials, which are mechanically reduced to fine fibres and then pressed under controlled conditions to form a dense, continuous sheet structure.
During the manufacturing process, premium-grade bitumen is uniformly impregnated throughout the entire board — not just surface-coated — significantly enhancing moisture resistance, dimensional stability, and long-term durability. The result is a robust, flexible board that conforms to joint surfaces while maintaining structural integrity under repeated load cycles.
Whether used in roads, bridges, retaining walls, or building slabs, Polyflame EJB delivers consistent performance year after year, even under harsh weathering and heavy traffic conditions.
Key Characteristics
Why Polyflame EJB?
- Multi-purpose bituminized softboard crafted from natural wood fibres — suitable for roof, wall, and floor applications in concrete and timber constructions
- Excellent elastic recovery after 50% compression — the board bounces back to near-original dimensions, sealing the joint effectively
- Good inherent thermal insulation properties, reducing heat transfer at joint interfaces
- Available in a wide range of bitumen content levels to suit varied site conditions and performance requirements
- Lightweight and easy to cut, shape, and install — significantly reducing on-site labour time
- Completely free of Asbestos, Chromated Copper Arsenate (CCA), and Lead — safe for workers and the environment
Standard Compliance
IS: 1838 (Part 1) – 1983
Polyflame EJB is manufactured in full compliance with the Indian Standard IS: 1838 (Part 1) – 1983, covering type requirements for preformed fillers for expansion joints in concrete structures — specifically tested for compression, extrusion, and recovery performance.
✔ Bureau of Indian Standards Compliant
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Roads & Runways
Ideal for filling structural expansion and separation joints in motorways, highways, runways, and pedestrian walkways where traffic-induced movement is constant.
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Bridges & Structures
Used extensively in bridge decks, abutments, retaining walls, curbs, piers, and lateral support systems to absorb thermal and dynamic movement.
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Buildings & Basements
Suitable for in-situ concrete construction, screed floors, site slabs, subways, basements, and other sub-structural applications requiring flexible joint treatment.
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Block & Concrete Joints
Effectively fills structural separation joints in block masonry and cast-in-place concrete constructions, preventing cracking and spalling.
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Piers & Abutments
Specially suited for expansion joints in piers and lateral support structures like abutments where directional movement must be accommodated.
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Industrial Floors
Applied in flat works, industrial concrete floors, and heavy-duty surface slabs that experience thermal cycling and mechanical loading.
