N1 — Surface Joint Sealant N1 is a surface-applied hot pour sealant, slightly more rigid in its characteristics. Used for road and runway surface joints. This is the primary material referenced in Shepherd & Sons’ M20 motorway work on the current website. Suitable for standard surface joint sealing on highways and airfield surfaces.
Applications: Highways, motorways (including M20), airfield surface joints. Specification: N1 hot applied joint sealant.
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