Sika Fast Fix All Weather | Ready to Use, Self-Setting Paving Jointing Compound for Any Weather, Suitable for Stones Setts, Paving Block and Footpaths - Deep Grey - 14kg - 20 sq.m :
No Nonsense Builders Silicone Clear 310ml - Screwfix
No Nonsense Patio Jointing Mortar Anthracite 15kg - Screwfix