ABOUT COMPANY
For over 25 years, Primostar has been helping builders create watertight and long-lasting structures with complete waterproofing and construction material solutions – from foundations to roofs.
At the heart of our work is the membrane-free “white tank” system – an environmentally friendly solution that makes concrete watertight from within. One of its key components is patented in three countries, reducing material use by up to eight times – a smarter, greener, more sustainable way to build.
Most of our materials are of German quality and come with professional consultation and installation guidance, ensuring reliability, precision, and long-lasting performance.
Trusted by contractors, developers, architects, and construction professionals, Primostar guarantees durable, watertight, and energy-efficient structures that last for decades.
Innovation
- Proven innovations that keep your structures safe for generations.
- Smart opportunities that make your construction faster, more versatile, and cost-effective.
- Smart, forward-thinking choices that save you time and money.
Reliability
- A partner you can rely on: listening, adapting, and solving challenges with you.
- An open-minded and reliable partner who listens to your needs, adapts to every situation.
- Flexible, personal solutions tailored to your situation and challenges.
Sustainability
- Environmentally friendly opportunities that make your project safer, smarter, and future-proof.
- Sustainable solutions with recyclable materials — helping you build responsibly without compromising quality.
- The right solution for your needs — reliable quality and long-lasting peace of mind.
Mission
To offer environmentally friendly and sustainable waterproofing solutions.
Vision
We want to be the leading company developing and offering waterproofing solutions in the entire Baltic and Scandinavia
years of operation
in a different market
completed projects with
White Tank solution
Primostar OÜ history
Indrek Uusalu joined Primostar.
Founded construction company Traveter. 
TalTech dormitory at Akateemia tee 7 and 9. Membrane Waterproofing.
Supplying projects with crystalline waterproofing admicture and metal-sheet waterstops.
Eesti Energia Oil Plant. White tank waterproofing.
Waterproofing of Tondiraba Ice Hall.
Founding of waterproofing materials manufacturing company
WPMEstonia OÜ.
Opened office in Lithuania.
Opened office in
Latvia.
Joining with Estonian Concrete Association.
First project in Ukraine. Ovruch kindergarten bomb shelter and foundation.
The first project in Turkey.
Primostar Group AS
As a result of the reorganization, everything bearing the Primostar name will be moved into one AS Primostar Group.
Primostar Group AB We established a subsidiary in Sweden.
Primostar Group AS is listed on the Nasdaq First North stock exchange.
What is the story behind the development of Primostar's eco-friendly waterproofing solution?
In the past, we imported construction joint profiles from German manufacturers for many years, but when using them on the construction site, the products developed some defects, which we wanted to improve with our own production. That's how the idea came to create the WPM® brand in 2018, whose main field of activity was waterproofing solutions for construction joints and controlled volume shrinkage cracks in concrete structures.
WPM® - from idea to implementation
We started production with simpler R and L construction profiles, which would be weather-resistant and become homogeneous when solidified with concrete.
In the first half of 2019, we started patenting the Crack Inducing Waterstop profile, and at the end of the year, the profile was used for the first time on the project Valge Street 16, as you can see in the video below.
Primostar's integral, i.e., white tank waterproofing solution, is a comprehensive approach to underground, reinforced concrete structures - using WPM® Metal Sheet waterstop, Crack Inducing waterstops, and crystalline waterproofing concrete admixture.
8 920+
Crack Inducing Waterstop
amount (in meters)
83 691+
Metal sheet Waterstop amount
(in meters)
488 969+
Crystalline waterproofing admixture amount (kg)
WPM® Crack Inducing Waterstop
is used to control shrinkage cracks, which results in the planned shrinkage crack being immediately waterproof and in the desired location.
WPM® Metal Sheet Waterstop
used for waterproofing construction joints against pressurized water in various underground reinforced concrete constructions.
Crystalline waterproofing admixture
gives the concrete a self-healing ability. Together with the water entering the crack, the admixture can close the static cracks in the concrete with an opening width of less than 0.4 mm.
Need more information about the white tank solution?
PASSIONATE TO WATERPROOF
BELOW GRADE SMARTER AND GREENER!
SAVE
THE ENVIRONMENT
- You will use 10X less waterproofing material.
- In order to be environmentally friendly, we have removed the packaging from the products.
SAVE
TIME
- Compared to conventional waterproofing, the installation of white tank waterproofing is up to 20x faster.
- The solution will last as long as the construction.
SAVE
RESOURCE
- You save on labor costs because the installation can be done by any concrete worker.
- Installation does not require additional equipment or special technology.
Read more about the environmentally friendly system of white tank:
Some examples of completed works
TalTech dormitory at
Akateemia tee 7 and 9.
Köster KSK was used for the first time.
Roll waterproofing volume 9500 m2.
Eesti Energia oil factory
Crystalline waterproofing admixture project.
Volume of concrete admixture 1714 m3.
Tondiraba Ice hall
Primostar supplied the material for the waterproofing of the Tondiraba ice hall: a pre-installed membrane under the floor, cold adhesive KSK on the walls, and the whole structure was cast with a crystalline admixture.
Volume of concrete admixture 6500 m3.
Roll waterproofing volume 15,000 m2.
Viimsi Primary School
Roll waterproofing volume 1778 m2.
Tartu mnt 52
Waterproofing and TPO roofs.
Volume of concrete admixture 1420 m3.
Roll waterproofing volume 1547 m2.
Veho car center
The volume of roll waterproofing is 3549 m2.
We have been awarded two times Gasell's diplomas for our development.
Gaselle companies have increased turnover and profit by more than 50% in three years, created the newest jobs, and carry the important characteristics of a rapidly developing company - flexibility, speed, and courage.
Only less than 1% of Estonian companies are Gasell's.
We care about the community and people!
We gladly support young, future successful athletes.
Support the rebuilding of Ukraine. We helped to build the Ovruch kindergarden.
We always support the Tallinn MK starge of cross-country skiing.
