I have just came across UK Sealants while looking for Silka 221 in black, had previously paid £14.99 on Amazon and have just paid £11.80 including postage. They are still trading online if you have a project ongoing.
www.uksealants.co.uk
I have no connection with this company at all!
Sealants Specialist | Silicone Sealant, Expanding Foam, Epoxy Resins, Adhesives and Supplies - UKSealants
UKSealants are a leading supplier of sealants, silicone and adhesives. Stocking brands such as Sika, Soudal and Everbuild. Free delivery on orders over £100.
I have no connection with this company at all!