When a foundation or underground structure must stay dry through decades of service, MasterSeal is the engineered membrane system. We install BASF MasterSeal on below-grade walls, plaza decks, and structural assemblies where leakage means failure. Full protocol, documentation, and warranty support included.
MasterSeal is BASF's answer to structural waterproofing: multi-layer membrane systems for applications where water intrusion is not a minor inconvenience but a structural liability. Multi-storey buildings with below-grade parking, plaza decks that sit above occupied space, underground utility structures, tunnels, and any assembly where the slab or wall must remain dry for the life of the building.
We work as a BASF-system installer, meaning we follow the full protocol: substrate prep, primer application, membrane installation at engineered thickness, and protection layer installation where required. The system warranty depends on this protocol being met; we document every step.
We work with the structural engineer to select the right MasterSeal variant (sheet membrane, liquid-applied, or hybrid) based on substrate type, exposure conditions, and construction sequencing.
Prepare the substrate
Concrete surface is cleaned and prepped to BASF specification. Cracks are repaired with compatible material, and joint areas are isolated and detailed for membrane application.
Apply primer and membrane
BASF primer is rolled or sprayed, then the MasterSeal membrane is installed at the engineered thickness with full coverage at all joints, penetrations, and transitions per the engineer's detail.
Install protection and document
Where required, the protection layer is installed to shield the membrane from backfill or traffic. The system is photographed and documented to support BASF warranty registration and structural review.
Engineered scope
Why Structural Waterproofing Demands Precision
Most MasterSeal projects involve a structural engineer because the waterproofing is part of the load-bearing assembly. The engineer specifies the product, thickness, and installation detail. Our role is to execute that spec with full documentation so the engineer can sign off and the warranty applies.
We also coordinate with other BASF products on the same project, such as MasterFlow grout for equipment pads or structural support. This keeps the entire system under one BASF protocol.
System types, structural engineer coordination, warranty and protection.
Below-grade structural waterproofing on commercial or institutional projects, plaza decks over occupied space, and any application where the engineer specifies BASF. We install when MasterSeal is specified rather than recommending it over alternatives.
Most MasterSeal projects do, because they involve structural assemblies. The engineer specifies the product and the install detail; we deliver to that spec with documentation.
For below-grade and traffic-exposed applications, yes. The membrane needs physical protection from backfill or traffic; the protection layer is what keeps the membrane functional through service.
Yes, system warranty applies when installed by a BASF-system installer to BASF spec. We deliver the documentation that supports the warranty submission.
Depends on area and system. Foundation walls can be done in days; large plaza-deck systems with multiple layers stretch over weeks. The schedule is in the quote.
MasterSeal below-grade install on a structural foundation. Documentation supported the engineering review, install passed inspection. The system path was clean from spec through warranty.
Z. G6
Structural Engineer, Las Vegas
★★★★★
Plaza deck MasterSeal with multiple protection layers. They knew the BASF protocol cold, joint detail at every transition. Holding through full traffic exposure.
Y. G6
GC, Henderson
★★★★★
Structural waterproofing with BASF spec on a complex below-grade project. The install matched the spec, documentation supported the audit. Real engineering-grade work.
Q. G6
Engineer, Boulder City
★★★★★
Below-grade MasterSeal across a foundation, full system warranty in our project file. Dry through three springs of melt. Worth doing right at structural scale.
X. G6
Property Developer, North Las Vegas
From the blog
Concrete Guides & Articles
Practical reading on planning, finishes and caring for concrete in Las Vegas.
