Pre-applied waterproofing also referred to as blindside waterproofing, is installed overtop of shoring substrates, creating a strong mechanical bond with the concrete as it cures to form an integral waterproof barrier. These systems are typically used in below-grade applications such as raft slabs, blindside walls, and tunnels where external access is limited after construction. By forming a continuous seal that prevents water migration, pre-applied waterproofing ensures long-lasting protection for structures exposed to hydrostatic pressure or challenging site conditions.

Lagging Wall

Natura HDPro™

SpraySeal™ NS-F300+GE

Foundation Wall

Raft Slab

Protection Slab

Mud Slab

Pre-Applied Waterproofing

NaturaSeal&nbsp;waterproofing solutions protect building structures from water ingress, moisture damage, and environmental deterioration. The waterproofing systems are efficient, eco-friendly, and cost-effective. This comprehensive suite of systems addresses a wide range of applications, including foundation waterproofing, podium and plaza decks, wet areas, water-retaining structures, and civil engineering projects. Each solution is engineered to provide a durable, seamless barrier that ensures long-term performance, structural integrity, and protection across residential and commercial developments.

Foundation Waterproofing

Underslab vapour barrier systems are traditionally installed beneath concrete slabs to prevent the upward migration of soil gases such as radon, methane, and moisture vapour. The system is also designed to resist hydrocarbons that may be present in the soil. These high-performance hybrid HDPE and PMAE membranes create a continuous monolithic seal that enhance indoor air quality, protects sensitive building materials, and supports compliance with health and safety standards. Underslab vapour barriers are a critical component of gas mitigation strategies across all building types.

Contaminated Soil

Granular Layer

RollnSeal B700 HD

SpraySeal F300 BGP / SpraySeal F300 BG

RollnSeal B700 RF

Rebar

Slab on Grade

SpraySeal&trade; F300 BGP is a proprietary Polymerized Modiﬁed Asphalt Emulsion (PMAE) technology formulated from organic compounds. This elastomeric waterprooﬁng coating is a post blended and instant-setting spray-applied to form a ﬂexible, seamless, non-permeable waterprooﬁng membrane.

SPRAYSEAL F300 BGP

SpraySeal&trade; F300 BG is a proprietary Polymerized Modiﬁed Asphalt Emulsion (PMAE) technology formulated from organic compounds. This elastomeric waterprooﬁng coating is a post blended and instant-setting spray-applied to form a ﬂexible, seamless, non-permeable waterprooﬁng membrane.

SPRAYSEAL F300 BG

BrushSeal&trade; M600 BR is a single component proprietary Polymerized Modified Asphalt Emulsion (PMAE) Technology formulated from organic compounds. This elastomeric (brush or roller) applied waterproofing coating is highly versatile and can be used for a variety of waterproofing and detailing applications, both indoors and outdoors.

BRUSHSEAL M600 BR

RollnSeal B700 HD is a 2-dimensional, HSPE (high strength Polyethylene) pre-applied waterproofing bonded system carrier sheet designed for heavy duty vertical and horizontal deep substructure applications. It is specially formulated using 100% virgin resin and high strength polypropylene (PP) geotextile. The select blend contains antioxidants &nbsp;that provides a high environmental stress crack resistance to alkalis and acids found in the soil and ensures a smooth, superior quality membrane. Our special extrusion process utilize low heat and low shear to prevent heat degradation in the finished product.

ROLLNSEAL B700 HD

GeotexSeal&trade; B700 RF is a needle-punched, uniform high-performance, nonwoven geotextile made of 100% polypropylene staple fibers and free of chemical binder.

GEOTEXSEAL B700 RF

Gas Mitigation: Underslab Vapour Barrier

Substrate

BrushSeal M600 BR

GeotexSeal B700 RF

Reinforced Concrete

NaturaSeal&amp;rsquo;s post-applied waterproofing system, also referred to as open-cut waterproofing, is installed after the concrete has been poured and cured to form a continuous barrier that protects the structure from water ingress. Commonly used on foundations, retaining walls, decks, and other exposed surfaces, these systems include specialized membranes designed to adhere securely to concrete surfaces. Post-applied waterproofing offers a reliable, long-term solution for both new construction and retrofit projects where the foundations are backfilled.

Back-fill

Post-Applied Waterproofing

Seamless foundation waterproofing for residential and commercial buildings, protecting structures from water ingress, moisture and long-term deterioration.

Foundation Waterproofing

Specification Layers

Gallery