Burnt Sand MasticRoundtower Burnt Sand Mastic is a traditional, oil based jointing compound designed for creating durable, flexible joints between timber or metal window and door frames and surrounding lime render, plaster, or masonry. Formulated with a blend of burnt sand, natural oils, and driers, this mastic cures slowly while remaining flexibleaccommodating minor movement and helping to prevent cracking, moisture ingress, and internal damp. Used extensively in

Protect fresh lime work from:

5 Grey develops higher early and long-term strength

improving comfort during warmer periods

As the lowest-strength mortar within the Cornerstone Marine range

Heritage Finish 35

Level the surface evenly while the plaster is still workable

marine environments

this hawk is easy to handle and comfortable to use

Published manufacturer literature states that sheep wool can help remove odours and airborne pollutants such as formaldehyde from indoor environments

Robust and flexible 3-layer membrane: coated PP nonwoven fabric

The membrane works to eliminate air and vapour leakage from internal areas to external

It is particularly suited to traditional restoration projects where compatibility with historic Roman Cement details is required