Expansion Joint Filler
Dseal HD100 Board
A high-density, non-bituminous expansion joint filler board that fills and protects movement joints before sealing — compressible, high-recovery and ready to receive the joint sealant.
The foundation of a sound joint
Every expansion joint needs a compressible filler that fills the gap, accommodates movement and provides a firm base for the sealant. Dseal HD100 is a high-performance, cross-linked, pre-moulded closed-cell board engineered to do exactly that — holding its shape during the pour, then compressing and recovering as the structure moves.
Manufactured from closed-cell polymers such as polyethylene or ethylene-vinyl acetate (EVA), HD100 is non-bituminous, non-staining and rot-proof. Formerly known as SIL flex / CAPCELL HD100, it is the modern replacement for traditional bitumen-impregnated fibre boards. Used with a backer rod and Dseal sealant, it completes a watertight, long-lasting expansion joint in floors, walls and decks.
Why HD100
Built for movement joints
- Exceptional compressibility & high recovery — typically greater than 90–95%, so the joint reopens after compression
- Negligible water absorption — less than 1%, so it will not swell, rot or break down in the joint
- Non-staining & bitumen-free — no oily bleed onto concrete or finishes
- Excellent chemical resistance — stands up to acids, alkalis and hydrocarbons
- Thermally stable — performs from −40°C to +70°C
- Easy to handle — lightweight, cuts cleanly and installs fast on floors, walls and decks
Technical Datasheet
HD100 typical values
Indicative properties for Dseal HD100 expansion joint filler board. Custom thicknesses available on request.
| Property | Typical Value | Test Method |
|---|---|---|
| Material composition | Cross-linked closed-cell PE / EVA | — |
| Density | 100 ± 10 kg/m³ | IS 10566 |
| Water absorption | < 1% (< 0.080 kg/m²) | IS 10566 |
| Compression recovery | > 90% (min) | IS 10566 |
| Extrusion (max) | 6 mm | IS 10566 |
| Thermal stability | −40°C to +70°C | — |
| Bitumen content | 0% (non-bituminous) | — |
| Chemical resistance | Excellent — acids, alkalis, hydrocarbons | — |
| Standard sheet sizes | 1000 × 2000 mm, 1200 × 2400 mm | — |
| Thickness range | 5 mm to 100 mm (custom available) | — |
Where HD100 is used
HD100 suits any structure that needs a durable, low-absorption movement-joint filler:
- Structural & isolation joints in buildings and slabs
- Bridges — decks, abutments and pier hinge joints
- Concrete highways, airport runways & taxi tracks
- Parking decks & industrial flooring
- Water-retaining & water-excluding structures — canals, dams and storage tanks
- Back-up support for joint sealants
Standards & compliance
Dseal HD100 is engineered to meet the recognised standards for preformed closed-cell expansion joint fillers:
- IS 1838 (Part 3) — preformed fillers for expansion joints in concrete
- MORTH Clause 1015.3 — highways and bridges
- ASTM D3575 — flexible cellular olefin-polymer materials
- ASTM D7174-05 — preformed closed-cell polyolefin expansion joint fillers
FAQs
HD100, answered
What is HD100 made of?
HD100 is a cross-linked, closed-cell board made from polymers such as polyethylene or ethylene-vinyl acetate (EVA). It is non-bituminous, so it will not stain concrete or bleed oil.
How is HD100 better than bitumen filler board?
HD100 offers far higher compression recovery (greater than 90% versus roughly 70–85% for bitumen board) and much lower water absorption (under 1% versus 15–50%), and it does not stain or degrade — giving a longer-lasting joint.
What thicknesses are available?
Standard thicknesses run from 5 mm to 100 mm in sheets of 1000 × 2000 mm and 1200 × 2400 mm, with custom sizes available on request.
Is HD100 waterproof?
Its closed-cell structure gives negligible water absorption (under 1%), making it highly water-resistant and ideal for water-retaining and below-grade joints.
HD100 Supply
Need expansion joint filler board?
Tell us your joint dimensions and we will supply HD100 cut to suit your project.