top of page

J.M. Pereira & Sons, Inc. has been in the waterproofing business for over 30 years. In keeping with our determination to provide the best products and services to our customers, we use a waterproofing product called Top Gun by Mar-Flex®. 


The TopGun product is an Elastomeric Emulsion exterior below grade waterproofing membrane that can be applied over almost any clean, dry, sound substrate. It features our hightest Residential "Limited -Lifetime" warranty and is a waterproofing industry product leader.

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

    Mar-Flex  Waterproofing

Because the product is asphalt-based it adheres to the wall as tenaciously as tar, but its rubbery nature allows it to stretch to bridge the minor shrinkage and expansion cracks typical in poured concrete walls. It carries a limited lifetime warranty that can be transferred to future owners of the home, adding both value and protection.


If you are a contractor who has used our waterproofing in the past, you can rest assured that your customers will be receiving the same great performance and the same great warranty coverage. With the advent of TopGun, we were presented with the opportunity to upgrade to a water-based product with out sacrificing the convenience of a membrane only product or the consumer confidence and marketability of a transferable limited lifetime warranty.


Our applicators are manufacturer certified and, as always, all warranty issues are handled in-house.

With next-day service and a service area covering Southeastern Pennsylvania, South and Central New Jersey and Northern Delaware, we will be there when you need us.

bottom of page