How is Antirock Primer applied?

Brush, roller or spray onto a clean, dry, dust-free substrate. Shake well before use. Allow to dry fully before applying torch-on membrane — never accelerate drying with a torch.

Which substrates does it suit?

Designed for concrete and metal substrates being prepared for Soprema bituminous torch-on membranes. Not for self-adhesive membranes — use Elastocol Stick for those.

What is the coverage rate?

0.15 to 0.25 L/m² depending on substrate porosity. One 19 L pail covers approximately 76-126 m².

How long before I can torch over it?

Drying time varies with temperature and humidity. Wait until completely dry to touch with no solvent smell — typically 30 minutes to several hours.

What are the safety requirements?

Highly flammable (Class 3, UN 1263). Store away from direct sunlight and open flame. Keep all ignition sources away during application and drying.

Why use a primer at all?

Improves bond strength of the torch-on membrane to the substrate, particularly on dusty or porous concrete. Skipping the primer is the most common cause of delamination.

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Soprema AntiRock Primer

Name: Soprema AntiRock Primer
Brand: Soprema
SKU: SSOS39
Price: 250.00 AUD
Availability: InStock

$250.00

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Discover SOPREMA Anti Rock Primer - a powerful solution designed to enhance adhesion and ensure optimal performance of torch-applied membranes.

Primes concrete and metal to improve adhesion of SOPREMA bituminous torch-on membranes

Minimum 1 hour drying time on smooth surfaces, brush or roller applied

Shelf life up to 5 years in original sealed containers

Quantity: 1

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Soprema AntiRock Primer

The Waterproofing Shop

Pickup available, usually ready in 24 hours

22/872 Canterbury Road
Roselands NSW 2196
Australia

+61280213517

Product Details

This premium primer combines SBS modified bitumen, fast-evaporating solvents, and adhesive enhancing additives. Ideal for both concrete and metal surfaces, Anti Rock Primer improves the bonding capability, providing a strong foundation for waterproofing and painting applications. Trust SOPREMA's expertise in delivering top-quality solutions that deliver outstanding results, ensuring durability and long-lasting protection. Take advantage of Anti Rock Primer's superior performance and unleash the full potential of your painting and waterproofing projects.

How to Use

Apply by brush or roller on clean, dry substrates at 0.15 to 0.25 l/m2. Shake well before usingConfirm the substrate is clean and dry and free of any residue that may hinder adherence
Keep ignition sources away during application and until solvent has evaporated
Ventilate carefully using mechanical means if necessary in closed areas
Shake the pail well before using
Apply ANTIROCK PRIMER with a brush or roller at 0.15 to 0.25 l/m2
Allow the primer to dry thoroughly, a minimum of 1 hour on smooth surfaces
Do not accelerate drying of ANTIROCK PRIMER by heating with a torch
Confirm drying has allowed complete evaporation of solvents before the membrane goes down
Apply the SOPREMA bituminous torch-on membrane once the primer is thoroughly dry
Clean tools with petroleum solvents such as mineral spirits, varsol, xylene

Technical Specifications

Product Type: Primer for SOPREMA bituminous torch-on membranes
Chemical Base: Blend of SBS modified bitumen, fast-evaporating solvents and adhesive enhancing additives
Physical State: Liquid
Colour: Brown (TDS); the SDS records a black colour highly flammable liquid with solvent odour
Specific Gravity at 20C: 0.91 kg/l*
Solids by Weight: 35 %*
Brookfield Viscosity at 25C: 50 cP*
Flash Point, ASTM D93: -3 C*
Drying Time on Smooth Surfaces: Minimum 1 hour*
Drying Note: In all cases, drying time must allow complete evaporation of solvents
Coverage: 0.15 to 0.25 l/m2
Packaging: 19 l pail
Pails per Pallet: 36
VOC: 340 g/L (SDS)
Auto-ignition Temperature: 465 C (SDS)
Shelf Life: Up to 5 years in original sealed containers, in cool and ventilated area
Hazard Classification: Flammable Liquid Category 2, Poisons Schedule S5 (SDS)
Dangerous Goods: UN 1133, ADHESIVES containing flammable liquid, Class 3, Packing Group II (SDS)
Appraisal: Appraisal No.1145 [2021]
* All values are nominal, as published in the SOPREMA technical data sheet

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Soprema AntiRock Primer

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Soprema AntiRock Primer $250.00

Technical overview

ANTIROCK PRIMER is a blend of SBS modified bitumen, fast-evaporating solvents and adhesive enhancing additives. It is used to prime concrete and metal surfaces to improve the adhesion of SOPREMA bituminous torch-on membranes, and the SDS describes the same use on civil engineering structures. It is applied by brush or roller at 0.15 to 0.25 l/m2 and must be thoroughly dry before the membrane goes down, a minimum of 1 hour on smooth surfaces. The data sheet carries Appraisal No.1145 [2021] and states that all values are nominal. It does not cite an Australian Standard, a test method other than ASTM D93 for flash point, or an accredited test report for this primer.

View full technical data sheet

Key applications

Priming concrete surfaces to improve the adhesion of SOPREMA bituminous torch-on membranes
Priming metal surfaces to improve the adhesion of SOPREMA bituminous torch-on membranes
Priming concrete and metal on civil engineering structures ahead of torch-applied waterproofing
Roofs
Civil works
Foundations

Surface suitability

Concrete (clean, dry and free of any residue that may hinder adherence)
Metal (clean, dry and free of any residue that may hinder adherence)

ANTIROCK PRIMER is a highly flammable product. Store away from direct sunlight and open flame. Keep ignition sources away during application and until solvent has evaporated. Harmful if inhaled, swallowed or when in contact with the skin. In closed areas, ventilate carefully using mechanical means if necessary. Do not pour residues in drains. Do not accelerate drying of ANTIROCK PRIMER by heating with a torch. It must be thoroughly dry before applying the waterproofing membrane and drying time must allow complete evaporation of solvents. Classified in the SDS as a Flammable Liquid Category 2, Poisons Schedule S5, suspected of causing cancer and of damaging the unborn child.

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Technical Specifications

Product Type	Primer for SOPREMA bituminous torch-on membranes
Chemical Base	Blend of SBS modified bitumen, fast-evaporating solvents and adhesive enhancing additives
Physical State	Liquid
Colour	Brown (TDS); the SDS records a black colour highly flammable liquid with solvent odour
Specific Gravity at 20C	0.91 kg/l*
Solids by Weight	35 %*
Brookfield Viscosity at 25C	50 cP*
Flash Point, ASTM D93	-3 C*
Drying Time on Smooth Surfaces	Minimum 1 hour*
Drying Note	In all cases, drying time must allow complete evaporation of solvents
Coverage	0.15 to 0.25 l/m2
Packaging	19 l pail
Pails per Pallet	36
VOC	340 g/L (SDS)
Auto-ignition Temperature	465 C (SDS)
Shelf Life	Up to 5 years in original sealed containers, in cool and ventilated area
Hazard Classification	Flammable Liquid Category 2, Poisons Schedule S5 (SDS)
Dangerous Goods	UN 1133, ADHESIVES containing flammable liquid, Class 3, Packing Group II (SDS)
Appraisal	Appraisal No.1145 [2021]
* All values are nominal, as published in the SOPREMA technical data sheet

Frequently asked questions

View all FAQs

How is Antirock Primer applied?

Application
Brush, roller or spray onto a clean, dry, dust-free substrate. Shake well before use. Allow to dry fully before applying torch-on membrane — never accelerate drying with a torch.
Which substrates does it suit?

Compatibility
Designed for concrete and metal substrates being prepared for Soprema bituminous torch-on membranes. Not for self-adhesive membranes — use Elastocol Stick for those.
What is the coverage rate?

Coverage & Coats
0.15 to 0.25 L/m² depending on substrate porosity. One 19 L pail covers approximately 76-126 m².
How long before I can torch over it?

Cure & Dry Time
Drying time varies with temperature and humidity. Wait until completely dry to touch with no solvent smell — typically 30 minutes to several hours.
What are the safety requirements?

Storage
Highly flammable (Class 3, UN 1263). Store away from direct sunlight and open flame. Keep all ignition sources away during application and drying.
Why use a primer at all?

Performance
Improves bond strength of the torch-on membrane to the substrate, particularly on dusty or porous concrete. Skipping the primer is the most common cause of delamination.

Why trade professionals choose Soprema

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.

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