What is Selleys Storm, and when should you choose it over a silicone?

Selleys Storm is a sealant range built around one capability that ordinary sealants do not have: it can be applied to a wet surface. Selleys describes Storm as delivering an immediate waterproof seal on any material*, wet or dry, indoors or outdoors, and says it can even be applied in the rain to stop leaks in an instant.

That is the whole reason the range exists, and it is the only reason to choose it over a conventional sealant. If your joint is dry and will stay dry until the sealant cures, a standard silicone is a normal choice. If the leak is active, the surface is damp, or the weather will not wait, that is Storm's job.

Why Selleys positions it this way

Conventional sealants such as silicones cannot be applied to wet surfaces, and can have adhesion issues on certain surfaces. Storm is Selleys' answer to both problems: regardless of the surface, and whether it is wet or dry, Selleys says Storm Sealant is ready for the job*.

It is powered by what Selleys calls Sil-X Advanced Polymer Technology, developed to withstand the toughest conditions.

One honest caveat. Selleys attaches an asterisk to its "any material" and "ready for the job" claims. The footnote that asterisk points to is not published on the brand page, so treat "any material" as a marketing summary rather than a specification, and check the sealant's own product page for the substrates and conditions it actually names before you rely on it.

What that means on site

Being able to seal in the rain changes the sequencing of a repair rather than its quality. With a conventional sealant, a leak found during weather has to be temporarily patched, then dried, then properly sealed once conditions allow — three visits and a window of exposure in between. A sealant that goes onto a wet surface collapses that into one job.

It also removes the most common cause of sealant failure on remedial work, which is applying to a surface that looked dry but was not. Where you cannot be confident a substrate is genuinely dry through, a product formulated for wet application removes the guess.

The Storm range

Check the product page for the cure figures, colours, pack sizes and — most importantly — the stated limitations. The brand page carries none of those.

Projects Selleys links to this range

Common questions about Selleys Storm

Can I really apply Storm in the rain?

Selleys states that it can be applied in the rain to stop leaks in an instant, and that it delivers a waterproof seal wet or dry, indoors or outdoors.

Does the surface need to be dry?

No. That is the distinguishing property of the range — conventional sealants such as silicones cannot be applied to wet surfaces, and Storm is formulated to be.

How soon is the seal waterproof?

Selleys describes the seal as immediate. For the full cure figures, check the product page.

Will it stick to any surface?

Selleys makes an "any material" claim but attaches an asterisk to it, and the footnote is not published on this page. Check the sealant's own product page for the substrates it names before relying on it for an unusual material.

What is Sil-X?

Sil-X Advanced Polymer Technology is the technology Selleys names as powering Storm, developed to withstand the toughest conditions.

Is Storm a silicone?

Selleys distinguishes it from conventional sealants such as silicones, describing it as powered by Sil-X Advanced Polymer Technology. The Storm Sealant product page sits within the roofing silicone category of the catalogue.

When would I use a wet area silicone instead?

For sealing bathrooms, kitchens and laundries, the Wet Area Silicone range is the one Selleys positions for those permanently damp indoor environments. Storm is positioned for extreme weather and for sealing surfaces that are wet at the time you seal them.

Can I use it outdoors and indoors?

Selleys states it delivers a waterproof seal indoors or outdoors.

What is Selleys Storm?

Selleys Storm is a range of waterproof sealants designed to protect homes from extreme weather conditions, offering superior protection against the elements. It features Sil-X™ technology and delivers immediate waterproof sealing on building materials in both wet or dry conditions, indoors or outdoors, and can even be applied in the rain to stop leaks instantly.

What technology does Selleys Storm sealant use?

Selleys Storm sealant uses Sil-X™ technology, which is a moisture-curing silyl-modified polymer (SMP) technology.

What colours and sizes is Selleys Storm available in?

Selleys Storm is available as a 290mL cartridge in Black, Grey, White, and White (Export) variants, with additional colours Clear and Grey also referenced in the broader product range.

What are the key features of Selleys Storm sealant?

Selleys Storm sealant is waterproof, weather resistant, highly flexible, highly versatile, paintable (with two coats of water-based exterior paint recommended), UV resistant, low odour, non-slumping, and stops and prevents leaks.

What surfaces and applications is Selleys Storm suitable for?

Selleys Storm is suitable for sealing, bonding, and filling joints in wet or dry surface applications, for both interior and exterior use, and can be applied to glass, metal, timber, brick, concrete, tiles, and most plastics.

What are the technical specifications for Selleys Storm, such as application temperature and curing times?

Selleys Storm has an application temperature range of 5°C to 35°C, a density of approximately 1.60, a tooling time of about 15 minutes, and a skin time of 15 to 30 minutes.

Who makes Selleys Storm and what company is behind the Selleys brand?

Selleys Storm is made by Selleys, an Australian adhesives, sealants and fillers brand founded by Martin Selley in 1939 in Sydney, Australia. Selleys is a division of DuluxGroup (Australia) Pty Ltd.

Can Selleys Storm be applied in wet conditions or rain?

Yes, Selleys Storm can be applied in wet or dry conditions and can even be applied in the rain to stop leaks instantly, thanks to its Sil-X™ technology.