Uncontrolled water ingress, dampness, and aggressive chemical exposure threaten concrete structures every day. With over 20 years of field engineering across Saudi Arabia and Egypt, OSISCO delivers certified waterproofing systems for structural preservation, environmental isolation, and long-term moisture protection.
Explore each system — engineered for site conditions, substrate type, and performance requirements.
Proven protection for basements, roofs and water-retaining structures
Rigid waterproofing for concrete and masonry structures
Flexible, durable membrane for tunnels, basements and pools
Long-term waterproofing for roofs, ponds and irrigation canals
Cost-effective protection for canals, lakes and infrastructure
Energy-efficient long-term roofing waterproofing
Flexible, UV-resistant coatings for roofs and facades
High-performance flexible coatings for demanding environments
Every facility faces a different battle — whether it is heavy hydrostatic pressure deep underground or intense UV radiation on an exposed roof. OSISCO specifies and installs durable below-grade and above-grade waterproofing technologies tailored to your site’s exact operational demands.
| Site Environment | Recommended Technology |
|---|---|
| Deep Foundations & Basements | PVC / TPO / EPDM / Bituminous Sheet Membranes |
| Exposed Roofs & Podiums | Spray Polyurea / Liquid Polyurethane Coatings |
| Water Tanks & Reservoirs | Crystalline Systems / Cementitious Slurry |
| Civil Structures & Tunnels | High-Performance Spray-Applied Elastomers |
Bituminous waterproofing & sheet membranes: Heavy-duty bituminous membrane waterproofing for foundations, basements, and retaining walls — hot-applied asphalt and torch-applied modified bituminous sheets engineered to withstand severe hydrostatic head.
Synthetic sheet membranes: Precision-welded PVC, TPO, and EPDM systems providing a continuous, puncture-resistant barrier for basements, sub-structures, and heavy civil assets.
Polyurethane waterproofing: For exposed roofs, balconies, and podium decks — exceptional dynamic crack-bridging, UV stability, and continuous joint protection.
Liquid applied waterproofing: Fast-curing systems for concrete roofs, terraces, and wet areas — forming a monolithic membrane that eliminates leak paths around complex penetrations.
Spray-applied polyurea: Ultra-fast curing elastomeric systems for extreme abrasion, high hydrostatic pressure, and rapid return-to-service projects.
Cementitious waterproofing: Polymer-modified cementitious slurry for concrete tanks, sumps, and wet rooms — bonded directly to concrete substrates.
Crystalline concrete waterproofing: Reacts with moisture inside the concrete matrix to grow insoluble crystals, self-healing hairline fractures and providing permanent protection from within.
| Property / Feature | Pre-Formed Sheet Membranes | Liquid-Applied Systems (PU / Polyurea / Acrylic) |
|---|---|---|
| Primary Application | Below-grade waterproofing, foundations, basements | Above-grade waterproofing, exposed roofs, podiums |
| Joint Integrity | Factory-controlled thickness; heat-welded seams | 100% seamless; eliminates lapped joints and weak points |
| Substrate Adaptability | Best for large, flat horizontal and vertical planes | Ideal for complex geometry, pipes, and intricate detailing |
| Chemical & Hydrostatic Resistance | Excellent barrier against soil salts, sulfates, and standing water | High resistance to UV exposure, pollution, and ponding |
Complete external tanking, retaining wall waterproofing, underground waterproofing, and waterproofing for concrete foundations designed to withstand continuous subterranean water pressure.
Roof waterproofing, podium waterproofing, balcony waterproofing, and terrace waterproofing utilizing weather-resistant elastomeric coatings.
Certified, non-toxic systems for water tank waterproofing, swimming pool waterproofing, reservoirs, and wastewater treatment facilities.
Heavy-duty bridge waterproofing, tunnel waterproofing, and parking structure waterproofing for dynamic loading and de-icing chemical exposure.
OSISCO protects mixed-use towers, shopping malls, and hotels against envelope leaks, dampness, and subterranean water ingress.
Chemical-resistant waterproofing for industrial buildings — containment basins, slabs, and roofs exposed to harsh process fluids.
Mega-scale works including water tanks and reservoirs, civil shafts, bridge decks, and tunnel membrane installation with resin injection support.
OSISCO is a certified applicator for leading global manufacturers, installing in strict compliance with ACI, ASTM, DIN, and EN standards:
Your questions, our answers
Waterproofing makes a structure water-resistant or impervious to water ingress. It is vital because unsealed water entry corrodes internal steel rebar, degrades concrete strength, encourages mold, and leads to severe structural degradation over time.
Look for a certified team with proven experience in your building category, direct applicator credentials from global manufacturers (such as Sika or Mapei), strict safety compliance, and a strong portfolio of successfully completed projects.
When specified correctly and applied by certified professionals, premium waterproofing systems typically last between 15 to 25+ years, depending on the material, exposure, and ongoing maintenance.
Selection depends on environmental exposure. Foundation waterproofing relies heavily on synthetic or bituminous sheet membranes, while exposed roofs perform best with liquid polyurethane or spray polyurea coatings. OSISCO’s engineering team reviews site conditions to recommend the exact specification.
Basements require full tanking using heavy-duty pre-applied PVC/TPO sheet membranes or multi-layer modified bituminous sheets, combined with specialized waterstops placed at all construction joints.
Membranes are pre-manufactured sheets (like PVC or bitumen) rolled out and seam-welded onto surfaces. Coatings are liquid-applied resins (like polyurethane or acrylic) that cure on-site to form a jointless protective film.
Cementitious slurries are primarily used for water-retaining structures such as water tanks, swimming pools, sumps, wet room interiors, and basement interiors where positive-side or negative-side rigid protection is required.
Polyurethane is ideal for exposed roofs, podium decks, and balconies that require high elasticity, seamless coverage, strong UV resistance, and durability under foot traffic.
Yes. Existing concrete can be retrofitted by mechanically profiling the surface, repairing structural defects, and applying liquid coatings, crystalline treatments, or structural injection systems.
Underground structures are waterproofed by installing external tanking membranes (PVC, TPO, or bitumen) prior to backfilling, placing continuous waterstops at construction joints, and sealing fractures with high-pressure resin injection.
Systems are typically verified using flood testing (filling horizontal areas with water for 24–48 hours), spark testing (electronic leak detection for pinholes in coatings), or visual seam inspection.
Our engineers respond within 24 hours. Free site assessment included.
Our engineering team responds within 24 hours.
Free site assessment for all new inquiries.