At most hardware stores such as Homebase.
There are many stores that sell sealants online. One can purchase these sealants online from 'Home Depot', 'Walmart', 'eBay' or in the UK one can get them online from 'Homebase'.
It is possible to buy a camping mattress from many camping stores across the UK (e.g. Millets). Many bed and home stores also sell camping mattresses (e.g. Homebase) as do a lot of big retail stores (e.g. Argos).
You can buy styrofoam at Michaels craft stores.
There are many crafts or DIY stores located in the UK. Some stores that offer DIY products and supplies include Maxwells DIY, Homebase, B&Q, and Robert Dyas.
Bathroom sinks can be bought at brick and mortar stores such as Homebase. Alternatively you could try online at website stores such as Amazon or eBay.
Illuminated mirrors can be bought in many department stores or home stores. One could try John Lewis, Debenhams or Homebase. Alternatively one could buy online from Amazon or even eBay.
Work boots can be purchased at most building and DIY stores including Wickes, Do It All and Homebase. They can also be purchased online or at the stores of Screwfix.
HomeBase was created in 1983.
HomeBase ended in 2001.
One can purchase a patio bar set at many home improvement stores such as Wilkinsons, Homebase and The Range. They can also be purchased from Dobbies and Strikes garden centres, online from Amazon and in larger Argos stores.
One could purchase a shelf from a company like Homebase. Homebase offers a range of these products in their stores in the UK. Alternatively, shelves can be purchased online from Amazon. Occasionally a shelf is available on eBay.