Soprema is a French waterproofing manufacturer whose torch applied and liquid applied systems are supplied to the Australian trade. The range stocked here covers Soprasun Plus sheet membranes for roof and balcony work, Colphene 3000 for below ground and retaining wall work, Alsan Flashing liquid detailers for junctions and penetrations, and the Elastocol Stick and AntiRock primers that go underneath them. It is a system led range, so most jobs pull a primer, a membrane and a detailing product from the same brand.
Soprema
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Soprema FAQs
Common questions about the Soprema range.
Still have questions?
Talk to our team for advice on the right Soprema product for your job.
Who is Soprema and what do they make?
Soprema is a French manufacturer of waterproofing and roofing materials, with its range supplied to the Australian trade. The focus is bituminous sheet membranes and the liquid applied products that detail them, backed by the primers and sealants that complete a system. What we stock sits mainly around roof, balcony, foundation and retaining wall work rather than internal wet areas.
What is the difference between Soprasun Plus 3 and Soprasun Plus 4.5?
Both belong to the same Soprasun Plus torch applied membrane family, and the designation identifies the grade. Which grade a job calls for is normally set by the project specification or the system build up rather than by preference, so check the technical data sheet on each product page before ordering. If you are matching an existing roof or balcony build up, confirm the grade with the specifier first.
Do Soprema membranes need a primer underneath?
Bituminous sheet membranes are normally applied over a compatible bitumen primer so the membrane bonds properly to the substrate. Elastocol Stick and AntiRock Primer are the two primers in this range, and the right choice depends on the substrate and the membrane above it. Prime first, let the primer go off, then lay the membrane, following the documentation for that pairing.
What should I use to detail upstands, penetrations and flashings?
Alsan Flashing is the liquid applied detailing resin in this range, stocked in a standard version, a Quadro liquid detailer and a Jardin version. Sopramastic is the cartridge product for joints and terminations. Liquid detailing is usually the cleanest way to close off corners, penetrations and upstands where sheet membrane is hard to dress in, so send the detail through if you are unsure which variant suits.
Can Soprema products be used below ground on basements and retaining walls?
Yes, Colphene 3000 is the below ground membrane in this range and is used on foundation and retaining wall work. Below ground waterproofing is usually a positive side application, meaning the membrane goes on the wet face before backfilling, and the detailing at penetrations and cold joints does most of the work. Where the same job also takes in external above ground areas such as balconies or roof decks, note those are commonly specified in Australia against standards like AS 4654, so read the specification for each area separately.
Is there a warranty on Soprema waterproofing?
Manufacturer warranties on waterproofing are generally tied to a complete system rather than to a single tin or roll, and often depend on an approved applicator installing to the published details. In practice that means the primer, membrane and detailing products need to come from the same system for cover to apply. For terms on a specific project, get in touch and we will point you to the right manufacturer documentation.
Where can I buy Soprema products in Australia?
Every Soprema line we carry is on this page: Soprasun Plus torch applied membranes, Colphene 3000 for below ground work, the Alsan Flashing liquid detailers including the Quadro and Jardin versions, Elastocol Stick and AntiRock primers, and Sopramastic cartridges. Order online for delivery Australia wide. If you are pricing a full roof, balcony or foundation build up, call the team and we will match the primer, membrane and detailing products so nothing is left off the order.




