How We Optimize Your Below-Grade Waterproofing Solution Up to 10X Greener?

Tested in Lab and Real-life Projects


to control and waterproof leaking shrinkage cracks!

WPM® Crack Inducer Profile

For controlling and waterproofing  concrete shrinkage cracks

WPM® Construction joint profiles  ​

To waterproof construction joints up to 2.4 bar positive waterpressure

WPM Crystalline admixture healing - Primostar OÜ

Crystalline admixture

Gives concrete “self-healing”  ability for cracks up to 0.4 mm.



helps you

Save environment 

You will use 2-10x less waterproofing materials which reduces the ecological footprint

Save installation time

You can install material quicker = have fewer labor costs, do more jobs, and help more customers.

Save money

You will save money on labour and material costs.


Waterproofing Solutions Materials Consumptions Comparison by m²

Black Tank Waterproofing 

Materials used:

  •  2 layers of 3mm SBS material (floor slab)
  • WPM® metal sheet waterstops
  • Primer
  • 2 layers of 3mm SBS material (wall)

    NET weight: 9.8kg/m²

Membrane Waterproofing 

Materials used:

  • WFP Pre-Tec
  • WPM® metal sheet waterstops
  • Primer
  • Köster KSK

    NET weight: 2.1kg/m²

Integral i.e. White TankWaterproofing 

Materials used:

  • Crystalline admixture 3kg/m³
  • WPM® metal sheet waterstops
  • WPM® Crack Inducing Waterstops

    NET weight: 1.05kg/m²

  • Crystalline admixture 1kg/m³ 
  • WPM® metal sheet waterstops
  • WPM® Crack Inducing Waterstops 

    NET weight: 0.48kg/m²

3D Automatic Crack Inducer Calculator

To make our customer's life easier, we made a 3D Automatic Crack Inducer Calculator solution, which calculates the quantity 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.


used in the "white tank" waterproofing system

WPM® Crack Inducer Profile

In 2008 we started to use crystalline admixture in hopes that it will solve our problems with shrinkage cracks due to the fact that it can grow together up to 0.4mm cracks. When engineers calculated 0.2 to 0.3mm cracks to 1m of 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 watertight at the desired location. We added a keyway shape to the profile to make the joint connection stronger so that it can be used in load-bearing structures.

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


WPM® Construction Joint Profiles

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

WPM® Waterstops works with up to 2.4 bar of positive water pressure. 

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 crack is under constant dynamic load, i.e., moving constantly, the admixture can not heal shrinkage cracks. In that case we need a solution that enables 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!


in the integral i.e. "white tank" waterproofing system 


WPM® CRACK INDUCER PROFILE-s are added to the concrete structure to control shrinkage cracks.

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.

WPM® 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.

Crystalline admixture to concrete mix

Crystalline admixture is mixed to the concrete in the concrete factory. We use crystalline admixture in soluble bags so it can be inserted to the mix conveniently and with no waste.

Concrete casting

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 for extra membrane 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.


we use to waterproof all extra necessary components

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 construction joint waterstops, allows to inject injection resign to close all openings in construction joint to stop water infiltration, if it were to happen.

When casting 10m+ walls without WPM® Crack Inducer profile then shrinkage cracks are guaranteed to occur!

With our experience from 2008, we have seen countless times the same problem!
Shrinkage cracks appear mostly after every 4-5m.

When using WPM® Crack Inducer profile with calculated distance we can solve shrinkage cracks problem!

As we saw that shrinkage cracks appear mostly after every 4-5m we decided to try different crack inducers on the market. Soon came out some of their deficits and we decided to make our own crack inducer without the flaws.

In the picture, we can see how on a 20m wall we are using three WPM® Crack Inducer profiles with a 5m distance to control and guide shrinkage cracks while waterproofing them at the same time.


Result of the WPM® Crack Inducer profile - Controlled and waterproofed shrinkage cracks.

Here is a price comparison using the classical i.e. "black tank" waterproofing method vs integral e.i. "white tank" waterproofing method on the same underground structure:

Prices march 2022 - Estonia

Waterproofing with the bituminous membrane (black tank method) Waterproofing with crystalline admixture and WPM® profiles (white tank method)
Foundation floor slab3200m2 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 Profile-660m x 51.50€ = 33 990€
WPM® Waterstops500m x 10€  = 5000€500m x 10€  = 5000€
Reinforcement1000m x 10€ = 10 000€1000m x 10€ = 10 000€
292 400€119 887.5€

Save on metal

As steel has risen in price, we can also use WPM® CRACK INDUCER profile to use smaller diameter rebars in constructions that does not need over dimensioning to control shrinkage cracks.  


that has used a "White tank" waterproofing system

Kiikri 6, Tallinn,

Materials used:

  • Crystalline admixture - 
  • WPM® SEALING ELEMENTS 80R and 125R - 625 m
  • WPM® CRACK INDUCER profile - 160 m

Marijas iela 2A, Riga, Latvia 

Materials used:

  • Crystalline admixture - 
    7416 m³
  • WPM® SEALING ELEMENTS 80R and 125R - 1260 m
  • WPM® CRACK INDUCER profile - 320 m

Tērbatas iela 72, Riga, Latvia

Materials used:

  • Crystalline admixture - 1230 
  • WPM® SEALING ELEMENTS 80R and 125R - 720 m
  • WPM® CRACK INDUCER profile - 145 m

Tērbatas iela 72, Riga, Latvia

What are YIT Latvia's thoughts about the "White Tank" solution in general?

"We like that materials were easy to handle and install. The best part is that there was no pasting and plastering of anything, pure and quick work! The turnover time was faster than we were used to before which was just a bonus for us! "


Does YIT Latvija plan to continue using "White Tank" waterproofing solution in cooperation with Primostar SIA?

"When we can we definitely will! The solution is quick and easy and the Crack Inducers are genial for controlling shrinkage cracks!"

Ingars Grimza • Project Manager | SIA YIT Latvija

 More references...​ 


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.

Indrek Uusalu

Primostar group majority shareholder and CEO

Indrek is an 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 a needed, patent-pending product, to help builders  waterproof  their concrete structures  better and smarter !


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