Cornerstone – SuperTherm Topcoat {Promix}

Masons Mortar

£16.65

We have not confirmed this price since it was first recorded. Check before buying.

SuperTherm Topcoat {Promix} is a dry bagged, ready mixed lime finishing plaster. WHAT IS IT -It s a ready mixed, high performance, lime finishing plaster. WHAT DOES IT DO It s designed to be applied as a topcoat over SUPERTHERM insulating lime plaster {as the basecoat plaster cannot be left as an exposed finish} HOW DOES IT LOOK Provides a suitable natural finish, aesthetically pleasing, with slight variation in surface texture, depending on how it s finished. If desired, and after it s cured properly, you can also apply a coloured lime paint or interior silicate paint. BENEFITS: •Easy to appl

Masons Mortar's own words, read from their page.

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Where this comes from

The part other shops don't tell you. Three separate questions, kept separate on purpose, each with its source.

UK company
Registered at Companies House as MASONS MORTAR LIMITED, number SC120873. Checked 2026-08-29.
Means the business is a British legal entity, not a British-sounding name owned elsewhere. It says nothing about where anything is made.
UK operations
Not yet checked.
Means people employed here, or premises they actually work from. We keep this separate from the company badge because a registered office can be an accountant's spare room, and a company can be registered in Britain while everything it does happens somewhere else. Where we have not looked, we say so rather than assuming.
British-owned
No majority shareholding traced outside the UK. Companies House.
Read from the register of people with significant control, following the chain of holding companies. It does not gate anything: a firm can be made here and owned elsewhere, and that is worth telling you rather than hiding.
Where it is made
The maker doesn't say, so neither do we.
This is about the individual product, not the company. A British firm can sell things made abroad, which is normal and not a criticism. We would rather tell you which is which than average them into a score.

Cornerstone – SuperTherm Topcoat {Promix}

Where this comes from

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