Why Danosa Waterproofing Products

Roof protection you can count on. Waterproofing membrane options for every need.

Top Quality

Maximum waterproofing durability above all else.

Ease of Use

Installation made simple for better application.

Cost - Efficient

Lower ongoing maintenance expenses.


Green in mind from product inception.


Certified by the best international standards.

Frequently Asked Questions

Your questions about waterproofing products—answered.

Waterproofing membranes protect roof surfaces to keep water out of a structure. Or whatever the weather throws at it. Besides the shielding, this layered material enhances your roof's lifespan (bye-bye leaks, mold growth, and structural damage). And on the energy side, it adds extra reflectance and reduces heat transfer.

Whether modified membranes or liquid-applied coatings, you'll need a primer when installing for optimum adhesion and overall results. Otherwise, there's the potential for waterproofing underperformance.

SBS (Styrene-Butadiene-Styrene) and APP (Atactic Polypropylene) modified bitumen aren't the same thing. Both are durable and flexible, yes. But the main difference lies in the material and use case. In Puerto Rico, SBS-modified membranes are the go-to option. The system features versatile elasticity and memory capabilities to better adapt to sudden climate changes and building movement. For hotter/sunlight-intense conditions, the torch-applied APP-modified membrane is also a high-temperature and aging-resistant option.

The use of liquid-applied products makes sense with metal roofs and roof restorations. Traditional waterproofing membranes – on metal roofs – get expensive, complex, and time-consuming. And when it comes to restorations, the liquid-applied coating can increase an existing membrane's lifespan by up to 3-7 years.

Reach Out – We're Here to Help

Have a question? Whether it's roofing or waterproofing—Danosa's inbox is open.