Is Soprasun Plus 4.5 suitable as a top-layer cap sheet?

Yes — the slate-granulated mineral surface provides UV protection, making it ideal as the exposed cap sheet in 2-ply torch-on roofing systems.

What goes underneath?

Soprasun Plus 3 (sanded or plain) is the standard base sheet, torch-welded directly to the primed substrate before cap sheet installation.

How much area per roll?

Mineral-faced rolls are 1 m × 7.5 m (≈ 7.5 m² per roll). Confirm roll length on delivery as Soprema occasionally vary lengths between batches.

How quickly can foot traffic occur after install?

Once the bitumen has cooled (typically 1-2 hours depending on ambient temperature) the membrane is fully bonded and trafficable.

How long can rolls be stored before use?

Rolls keep indefinitely when stored upright in their delivery packaging, away from direct sunlight and heat.

Which standards does the cap sheet meet?

Tested and compliant to AS 4654.1 with supporting ASTM data; passes durability, dimensional stability, watertightness and heat ageing.

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Soprema Soprasun Plus 4.5

Name: Soprema Soprasun Plus 4.5
Brand: Soprema
SKU: SSOS6
Price: 200.09 AUD
Availability: InStock

$200.09

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SOPRASUN PLUS 4.5KG MINERAL, a cutting-edge heat-welded cap sheet membrane featuring a composite reinforcement and APP modified bitumen. This high-quality roofing solution offers exceptional durability and waterproofing capabilities, making it an ideal choice for various applications.

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Soprema Soprasun Plus 4.5

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Pickup available, usually ready in 24 hours

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Roselands NSW 2196
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Product Details

With its advanced composition, SOPRASUN PLUS 4.5KG MINERAL ensures superior protection against weather elements, extending the lifespan of your roof. Experience peace of mind knowing that this innovative membrane is designed to withstand the test of time, providing long-lasting performance and reliability. Explore the advantages and diverse applications of SOPRASUN PLUS 4.5KG MINERAL for your painting and waterproofing needs.

Advantages:

Enhanced durability and strength due to the composite reinforcement
Superior waterproofing properties for maximum protection against water infiltration
Heat-welded installation ensures a secure and seamless bond
Exceptional resistance to weather elements, including UV radiation
Extended lifespan, reducing maintenance and replacement costs

Where it can be used:

Residential and commercial buildings
Flat or sloped roofs
Industrial facilities
Public infrastructure projects
Schools, hospitals, and other institutional buildings
Roofing projects requiring painting and waterproofing solutions

How to Use

Fully heat welded using a propane torch or MINI MACADEN; unroll perpendicular to roof slope, end-laps staggered 1m apart1. Verify substrate is smooth, dry, free of contaminants, with min 1% gradient.
2. For concrete substrate (CSP 3-6 per ICRI), prime with ANTIROCK PRIMER (skip if installing over compatible base sheet).
3. Unroll membrane perpendicular to roof slope from low point, shingled to prevent back-water laps.
4. Apply heat with propane torch to the underside until thermofusible film melts (6-12mm hot bitumen flowing ahead of roll, 3-6mm bleed-out at laps).
5. Stagger end-laps 1m apart; ensure all side-laps and 150mm end-laps fully adhered and watertight.
6. Detail all penetrations and upturns per Soprema Installation Guide.

Product Files

No documentation available for this product.

Soprema Soprasun Plus 4.5

$200.09

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Frequently asked questions

Is Soprasun Plus 4.5 suitable as a top-layer cap sheet?

Application
Yes — the slate-granulated mineral surface provides UV protection, making it ideal as the exposed cap sheet in 2-ply torch-on roofing systems.
What goes underneath?

Compatibility
Soprasun Plus 3 (sanded or plain) is the standard base sheet, torch-welded directly to the primed substrate before cap sheet installation.
How much area per roll?

Coverage & Coats
Mineral-faced rolls are 1 m × 7.5 m (≈ 7.5 m² per roll). Confirm roll length on delivery as Soprema occasionally vary lengths between batches.
How quickly can foot traffic occur after install?

Cure & Dry Time
Once the bitumen has cooled (typically 1-2 hours depending on ambient temperature) the membrane is fully bonded and trafficable.
How long can rolls be stored before use?

Storage
Rolls keep indefinitely when stored upright in their delivery packaging, away from direct sunlight and heat.
Which standards does the cap sheet meet?

Performance
Tested and compliant to AS 4654.1 with supporting ASTM data; passes durability, dimensional stability, watertightness and heat ageing.

Soprema Soprasun Plus 4.5

The Waterproofing Shop?

Frequently asked questions

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