Painted and coated surfaces
Internal walls, floors and ceilings
Limestone, including Portland, Blue Lias, Cotswold, Bath Stone and Hamstone. (For a limestone treatment, use Raincheck LS)
Bungaroosh
Fibre cement roofing sheets and panels

Yes, as long as there is some sand content within the lime mortar mix.

We recommend waiting 1 to 2 months before applying Stormdry Masonry Protection Cream onto recently applied lime mortar. Earlier application may inhibit the mortar curing process as well as Stormdry Masonry Protection Cream penetration.

If there is cement in the mortar mix, Stormdry Masonry Cream can be applied after 2 to 3 weeks.

Stormdry Masonry Protection Cream has been formulated to cure to a colourless finish with no gloss or pigmentation.

Because Stormdry Masonry Protection Cream achieves its water repellency by lining the pores of the masonry rather than by coating the masonry surface, it will not leave a glossy sheen associated with some masonry sealant products.

In some rare cases, after an initial application of Stormdry Masonry Protection Cream, there can be a slight darkening of the brickwork, but this will fade with time and will return to normal.

We always recommend carrying out a small discrete test area prior to the full application of Stormdry Masonry Protection Cream to masonry to confirm aesthetic acceptability.

It may take up to two months after application for the full beading effect to appear when rainfall hits the treated wall.

Stormdry can be applied to damp / wet walls, although it will slow down the absorption time. It will not affect the performance once Stormdry Masonry Cream has 'soaked in'.

Once a wall has been treated with Stormdry Masonry Cream, new mortar will struggle to adhere to it unless the following steps are carried out:

Rake the existing mortar out to at least 25 mm to remove any existing mortar that has absorbed Stormdry Masonry Cream. Repoint with a sand:cement mortar containing Stormdry Repointing Additive No.1.

The above also applies to lime mortar.

Stormdry Masonry Cream is suitable for application to the following unpainted/uncoated external substrates:

Sand & cement renders (Monocouche, Harling)
Concrete
Mud
Earth mortar
Natural and / or man made composite slate such as paving; cladding; roofing products
Uncoated / unpainted roof tiles

Stone such as:
Bullwell Stone
Jesmonite
These specific sandstones: Sheffield; York; Blaxter; Glasgow Red

Mortars such as:
Sand & cement mortar
3:1 Hydrated Lime/Sharp Sand
3:1 NHL 2/Building Sand
3:1 NHL 3.5/Plastering Sand
3:1 NHL 3.5/Sharp Sand
3:1 NHL 3.5/Building Sand
3:1 NHL 3.5/Ballast
3:1 NHL 5/Building Sand
4:1 NHL 2/Sharp Sand
4:1 NHL 5/Sharp Sand
6:1 Cement/Sharp Sand
6:1 Cement/Building Sand
6:1:1 NHL 3.5/Cement/Sharp Sand
6:1:1 NHL 3.5/Cement/Building Sand

Bricks such as:
Vandersanden Zero Mangaan
Vandersanden (Quartis)
Terca Oud Latem
Terca Pastorale
Weber Pral M External Render
Laterite Brick (Ghana)

It is always recommended to apply Stormdry Masonry Cream to a small area to check compatibility before applying it over a wide area.

A second coat is not necessary, assuming it was applied in accordance with our preparation and application guidelines and to a compatible substrate.

We do not recommend applying more than one coat as this may reduce wall breathability.

Stormdry Masonry Cream is designed to prevent rain penetration through an external wall, whilst allowing water vapour from within the building to pass through to the outside.

For this reason, we do not recommend it for use internally.