TopGun Waterbase Emulsion Waterproofing


The Mar-flex TopGun Waterbase (WB) Elastomeric Emulsion Exterior Below-Grade Waterproofing Membranes are tested and proven membranes that can be applied over almost any clean, dry, sound substrate.

It features our highest Residential *“Limited-Lifetime” warranty and is a waterproofing industry product leader.

*Limited Lifetime Warranty available for Residential Poured Wall New Construction


TopGun WB Waterproofing Membrane is available in 55-Gallon Drums, 330-Gallon Totes and Bulk (6,000 Gallons).


TopGun WB is recommended for new construction waterproofing of all below-grade basement walls of poured concrete, unit masonry construction or ICF walls. TopGun WB can be used as a membrane spray only or as part of a system.

Leeds Data

Mar-flex TopGun WB membrane is considered a GREEN product and can be used toward LEEDS building credits.


For maximum product output, Mar-flex recommends the use of airless spray equipment. A pressure of 3000 psi is required to spray the membrane.


Depending on porosity and roughness of surface, coverage rate for spray application should be 4-5 gallons per 100 ft². Final application should be a minimum of a 60-mil wet thickness resulting in 40-mil dry.