S.R.21 2014 + A1: 2016 ANNEX E - T3 - Blinding
SR21 Annex E T3 Blind is a fine crushed limestone material produced in accordance with Transport Infrastructure Ireland (TII) standards for unbound granular materials. It is specifically designed as a blinding layer—a thin, compactable layer used to seal and smooth the surface of sub-bases such as Clause 804 or Clause 505 materials before final surfacing.
This product ensures a tight, even finish by filling surface voids, reducing dusting, and improving compaction. It is also ideal for yard hardstandings, driveways, paths, and other construction projects requiring a clean, stable, and uniform surface prior to paving, concrete, or asphalt placement.
SR21 Annex E T3 Blind is compliant with EN 13242: Aggregates for unbound and hydraulically bound materials and certified under S.R. 21: 2021 +A1: 2023 Annex E (Table E.1, T3).
Typical Characteristics
Property | Specification |
|---|---|
Type | Fine crushed limestone (blinding / fines) |
Typical Size Range | 0 – 4 mm or 0 – 6 mm |
Compliance Standard | S.R. 21 Annex E T3 (EN 13242) |
Use | Blinding, finishing layer, sub-base sealing |
Compaction | Excellent — high density and smooth finish |
Permeability | Moderate — designed to reduce water ingress and dust |
Applications
Final surface dressing on Clause 804 sub-base
Hardstandings, farm roads, and yard surfacing
Pathways, driveways, and laydown areas
Blinding beneath concrete slabs or bituminous surfacing
Dust suppression and surface sealing on compacted stone layers
Key Benefits
Provides a clean, compact, and sealed finish
Improves appearance and stability of base layers
Reduces dusting and fines migration
Meets full SR21 Annex E T3 certification requirements