Smart waterproofing solution for underground reinforced in-situ concrete.

Since 2009, we have been offering a complete waterproofing solution, also known as the “white tank” method, with crystalline admixture and other products in this system, including construction and deformation joint profiles, on large construction sites.


Leaking cracks

Engineers calculate 0.2-0.3mm shrinkage to the reinforced concrete structure in the construction design. Our real life experience show that cracks open more than 0.3 mm and will result in leaking cracks.


for leaking cracks!

Crystalline admixture

“self-healing” ability for racks up to 0.4 mm.

Construction joint profiles

To waterproof construction joints.

Crack Inducer Profile

For controlling and waterproofing cracks that open > 0.4 mm.

More about the materials

used in the "white tank" waterproofing system

Crystalline admixture

The crystalline 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.

When the gap is under constant dynamic load, i.e., moving constantly, the admixture can not fill cracks with an opening greater than 0.4mm. In that case we need a solution that enables for the concrete block to move, but also waterproof the cracks that has been made by the moving. For that we made WPM CRACK INDUCER profile.

Crystalline admixture is packaged into a soluble bag which makes the mixing process easier and with zero waste!

Construction joint profiles

WPM SEALING ELEMENT profiles are designed to waterproof construction joints. Compared to alternative solutions, metal sheet is more reliable and long lasting. We have added mineral coating to make concrete and metal sheet connection stronger and reliable.

Works with up to 2.5 bar of water pressure. 


In 2008 we started to use crystalline admixture in hopes that it will solve our problems due to the fact that it can grow together up to 0.4mm cracks. When engineers calculate 0.2 to 0.3mm cracks to the reinforced concrete structure in the construction design it seemed like a perfect fit at the time.

When we understood that some cracks open more than 0.4 mm and crystalline admixture could not grow them together we designed a solution for controlling the shrinkage of reinforced concrete structures so that the cracks produced by the shrinkage are immediately waterproof at the desired location. We added pin-shape to the profile to make the joint connection stronger so that it can be used in a load-bearing structures.

In addition, as the crystalline admixture can not grow together dynamic cracks that open and close, WPM CRACK INDUCER profile allows that movement to happen, making dynamic cracks waterproof.

3D Automatic Crack Inducer Calculator

3D Automatic Crack Inducer Calculator

To make our customers life easier, we made a 3D Automatic Crack Inducer Calculator solution, which calculates the quantitative cost of all WPM construction joint profiles. Just add height, length and width. The calculator is interactive and can be viewed 360 degrees from any angle.

In addition we are working on a next generation calculator so we can add the whole concrete structure plan with the pipe and cable penetrations.

Sounds interesting and you would like to know more?

Waterproofing step-by-step proccess

in the "white tank" waterproofing system

Crystalline admixture to concrete mix
Crystalline admixture is mixed to the concrete in the concrete factory. We use crystalline admixture in souluble bags so it can be inserted to the mix conveniently and with no waste.
WPM CRACK INDUCER PROFILE-s are added to the concrete structure to control cracks that appear due to concrete shrinkage.

Using our 3D Automatic Crack Inducer Calculator's plan, the instalment of the profile is easier than ever, because it shows exactly where to install the profile by a cm.
Construction joint profiles
Construction joint profiles are added just before casting process to prevent water infiltration from the construction joints.

Using our 3D Automatic Crack Inducer Calculator's plan, the instalment of the profile is easier than ever.
Concrete pouring
Concrete that is mixed with crystalline admixture is being pored after all the construction joint profiles and crack inducing profiles are installed.
Concrete structure is waterproof after casting proccess!
With 3 component white tank method the concrete structure is waterproof after the casting process. No need to take extra time to add any types of coating to the outer layer of the structure! If there will be any cracks crystalline admixture in the concrete will grow it together (cracks up to 0.4mm)

If there should be a static crack opening up to a 0.4mm and will not grow together we will inject the static crack and close the leak in our own expense. Same goes with WPM CRACK INDUCER profile static cracks, if they start to leak and do not stop the leaking, we will eliminate the leak in our own expense.


KRASO - Pipe Penetrations

Kraso pipe penetrations and sealing elements, makes it easy to penetrate pipes and cables through concrete walls without water infiltration

BeSealed - Plugs and Rings

BeSealed hydrophilic plugs and rings allow us to waterproof concrete cracks around formwork spacers and formwork spacers themselves

WFP Injection System

Using as a backup addition to joint profiles, allows to inject injection resign to close all openings in construction joint to stop water infiltration, if it were to happen.

"white tank" method

helps you

Save environment

You will use environmentally friendly raw materials which helps to reduce your footprint

Save on installation time

You are able to install material quicker = less labour costs, ability to do more jobs and help more customers.

Save money

You will save money on labour and material costs. 

Here is a price comparison using “black tank” method vs “white tank” method:

Prices march 2022 – Estonia

Waterproofing with bituminous membrane (black tank method)Waterproofing with crystalline admixture and WPM profiles (white tank method)
Foundation3200m2 x 35€ = 112 000€1000m3 x 3kg = 3000kg x 6.90€ = 20 700€
Walls1700m2 x 22€ = 37 400€425m3 x 3kg = 1275kg x 6.90€ = 8 797.5€
Intermediate ceiling (-1)3200m2 x 20€ = 64 000€1000m3 x 3kg = 3000kg x 6.90€ = 20 700€
Intermediate ceiling (0)3200m2 x 20€ = 64 000€1000m3 x 3kg = 3000kg x 6.90€ = 20 700€
WPM CRACK INDUCER profile660m x 51.50€ = 33 990€
WPM SEALING ELEMENT500m x 10€  = 5000€500m x 10€  = 5000€
Carcass1000m x 10€ = 10 000€1000m x 10€ = 10 000€
SUM292 400€119 887.5€

Sounds interesting and you would like to know more about how to become a partner!

Selection of projects

that has used our waterproofing system

Kiikri 6, Kiikri Residendid

Kiikri 6, Tallinn

Materials used:
– Crystalline admixture


Marijas iela 2A, Riga

Materials used:
– Crystalline admixture

Kalvarijų g. 88, Vilnius

Materials used:
– Crystalline admixture


with our "white tank" waterproofing solution?

Reliable partner

Primostar was started in 2000 and has grown yearly turnover on average every year 26%
from 24 000€ to 1.4M € in 2021.
We have gone through economical crash of 2007-2008 and all other ressesions between and are stronger than ever!

Quality products

Primostar has been providing German quality materials since day one. We are working with industry-leading experts!
Now producing our own Estonian made product we are on par with the German quality if not even better!

20+ years of experience

By working closely with our partners we are seeing first hand what is working and what is not. With that, we have gathered knowledge of what is working and what is not, making us qualified to offer consultation with our experts for our products.

Who are we looking for?

We at Primostar are looking for two types of partners!

Construction company's looking to buy straight from us

We are looking for partners that know and trust us with our solutions. If there is a new building going to be built, we would like to be in the loop of the project planning process so we can give our best know-how and plan the best waterproofing solution for that particular building.

Our 20+ years of experience show that problems start when constructors don’t plan the waterproofing solution to the plan early which lead to a budget and material problems later.

Retail company's looking to represent our products with our 20+ years of experience

We would like to partner up with a retail company that want to represent our products with our waterproofing solution.

We are offering products from our “white tank” solution that are constantly improving and customizable if needed. We also share our most up-to-date know-how with different situations to keep our partners always step a head!

Indrek Uusalu

Our majority shareholder and CEO

Indrek is entrepreneur, leader, product developer and next-generation waterproofing solutions enthusiast.

He joined the company in 2002 as a commission-based salesman and became the CEO the next year in 2003.
As a CEO he is responsible for growing the company’s average turnover from 24 000€ to 1.4M€ in 2021.

Founded a manufacturing company WPMEstonia OÜ in 2018 with 16 years of knowledge in the industry and created needed, patent pending product, to help builders waterproof their concrete structures better and smarter!

After sending the request, we will send a copy of the sent email to the sender’s email so that the content of the message is not lost and everything is conveniently accessible!

Send us your questions or inquiry!