Betostal SLN

Admixture acrylic resin
for waterproofness & reinforcement of resistance

(if the links below refer to Greek pages, contact us for further information)

1. Identification of the product
Category WINWET: 3. Repair & construction admixtures
Product description: Self-polymerizing acrylic water soluble resin admixture for the construction of waterproofing and elastic mud with high mechanical resistances for masonry and vertical masonry. Copolymer emulsion water-based.
Materials on which it is applied: Cement, fine white sand, sea sand, water
Safety data: It contains no carcinogenic solvents, is water based. For more details, please read the Safety Data Sheet of the product.
2. Data on the operation of the product
Which problems are solved by the product and in which ways: During the construction of the mud for masonry construction with bricks or with stones traditionally is used lime, which imparts to mud with the necessary adhesiveness and good workability. However, the lime has some serious drawbacks, such as hydrophilicity and the creation of white spots, which especially in the masonry is particularly unsightly. Furthermore, lime does not give any elasticity to the mud and no resistance to expansions and contractions and the vibration from microseismic and other causes, resulting in the creation capillary cracks through which because of hydrophilicity of lime moisture easily passes and destroys the internal plasters of the building. Indeed, when it is very cold, the trapped inside the cracks moisture when freezing expands and breaks up till eventually whittling and completely eliminates the consistency of the masonry. All this, of course, are problems perceived over the years, but the right time to prevent them is during the construction of masonry mud, not later.
Betostal SLN, which is an improved version of the for 17 years old Betostal 2/14, was on the market in 2006, after a lengthy investigation to solve the above problems, as it is 100% acrylic, it has great elasticity and waterproofness, is not damaged by alkalis of the wall neither is aging in time as the rubber emulsions, while not hydrolyzed by moisture such as resins in powder formula PVAc. It also greatly enhances the mechanical resistances of masonry against all factors that threaten it, the most important of which are following:

  • expansions and contractions due to temperature changes
  • vibrations due to earthquakes and other causes
  • friction and shocks heavy objects or objects with great impulse
  • the load which causes the weight of the construction itself

Besides these positive properties Betostal SLN has the positive properties of lime, which is the high adhesiveness and good workability, and therefore  removes it completely. For all these reasons Betostal SLN is the ideal solution and is necessary admixture for any construction or wall masonry.

Operating principle and way of action: The resin, as polymerized (“laminated”) due to contact with air, is creating a waterproof elastic mass which attaches great consistency and adhesiveness in mud and reduces the creation of pores during its drying. The result is a waterproof construction with high mechanical resistance, cohesion, elasticity and high waterproofness.
Benefits: 1. As an admixture of masonry mud it offers higher adhesiveness and resistance to mechanical stresses.
2. In conjunction with Betoplex it is an ideal admixture for construction of waterproof, elastic and resistant walls and bottom of pool, tank, planter, cesspools, wells, ground retaining walls etc.
Advantages over other methods: Compared with other additives in the market it has the following advantages:

  • As it dries, it doesn’t crack.
  • It is not affected over the years by the alkaline environment of the concrete.
  • It is not subjected to aging, neither disintegrated.
  • It is more resistant to expansions and contractions.
Comparison with other materials of Winwet family: As admixture it lasts longer to mechanical stresses due to load and shocks than Betoplex, which is used in other applications where high elasticity and not the mechanical resistance is desired (cast self-leveling floor screed, manufacture of repair cement for cracks without water, which is not cracking during drying, synthetic mud for horizontal structures etc.).
Compared with Sovaplex it has lower elasticity and adhesiveness, so it is used predominantly in the manufacture of elastic and waterproof plaster, when the elasticity is much more important than the mechanic resistances, for which outperforms Betostal SLN.
Compared to Polibond Elastico, which is a newer design and quite more expensive material, it has quite lower elasticity, while as far as the waterproofness is concerned it is the same. Polibond Elastico is used with little or no water and only with cement without sand, for the manufacture of elastic and waterproof mixture for the filling and sealing of cracks and openings created by expansions and contractions or landslides.
Experiment control of the efficacy of the product: Text under construction
Application fields: This space will be filled shortly with links that will lead into a separate document for each different product application field.
3. Application of the product
Necessary equipment for the application: For the application of the resin you should have at your disposal:­

  • what is indicated in the Winwet Application Equipment List.
  • What is indicated in the text concerning the specific field of application of the product
Protection of adjacent surfaces: Because when it is dried on marble, tiles, metals, etc. surfaces, it is hardly cleaned protect such surfaces with nylon or newspapers.
If it will drip, wipe the surface thoroughly immediately with a damp cloth or paper before starting polymerization of the resin.
Dilution: None. Pour the product in barrels, once you shed the cement, water and the other materials.
Weather conditions during the application: On cloudy or sunny weather, cold or heat the end result will be exactly the same. The sun and the heat just accelerate the polymerization and waterproofing. If there is a forecast for rain by the National Meteorological Service, the application should be deferred.
Lower polymerization temperature: 3οC. If the   temperature falls below 3οC before the polymerization is complete, the water begins to freeze and the same happens to the special penetrators containing the resin, thus losing its coherence and waterproofness. Therefore, you should avoid the application of the resin when it is very cold.
When the resin is polymerized completely, the frost does not cause any damage to the resin.
Drying time: Although cement needs several days to dry thoroughly, the resin which is an admixture in it is fully waterproofed when polymerized, so it dries up.
Completion time of polymerization: 4 days or less. During the hot and dry days of summer the polymerization lasts 24 hours.
Paintability after the application: The surface can be painted immediately after drying of the resin (property also redundant).
Paintability with paints admixture: There is   the possibility that the mud contains Betostal SLN be tinted with paint admixture or metal oxides. For more information please click here.
Instructions for use: Click here to see in PDF format the label with the instructions for use which is affixed on the product.
4. Resistance of the applied product
Resistance to expansions and contractions, vibrations and earthquakes: Very good. The polymerized resin within the mass does not lose its shape nor is torn due to the movement and the internal frictions caused by such phenomena.
Resistance to shocks and frictions: Good.
Behavior in acid and alkaline environment: The polymerized resin is not attacked by the alkaline environment which create for example the aggregates nor by the acid environment caused by weather conditions, plant roots etc.
Resistance to temperature
Thanks to its elasticity the polymerized resin withstands sudden temperature changes.
Resistance to extreme temperatures: Excellent, even at high heat and freezing cold conditions as those that occur only in certain areas of Northern Greece as far as Greece is concerned.
Resistance to solar ultraviolet radiation: Very good.
Resistance to constant contact with water or moist soil or other form of moisture: Very good: After its polymerization the resin does not dissolve in water and is not emulsified, even if it remains in continuous contact with water or humidity for several months.
Resistance to gauge pressure: High, but this feature is unnecessary, because obviously the walls and masonry are not used in applications that may be exercised such pressures by waters.
Lifetime: Unlimited. The polymerized resin does not lose its properties over time, firstly because the material does not age (is not dried nor decomposed) and has high elasticity (does not lose its shape nor is torn with expansions and contractions) and secondly because in the pores it is completely protected from the sun, the weather conditions and mechanical damages.
5. Natural properties of the product
Product form before its application: Milky thin liquid.
Product form after its application and   polymerization: Single transparent, colorless, waterproof cohesive elastic mass diffused into the concrete and the other materials.
Elasticity: Good.
Adhesiveness: Good.
Air permeability and vapor permeability: Yes, it allows transpiration, because the polymerized resin has such a molecular structure that does not allow the passage of water but allows the passage of air and water vapor between its molecules. This ensures the following key benefits:
1. The building is well ventilated and living in it is healthy and pleasant, because there is no smell (“musty”) or oxygen deficiency causing headaches, sleepiness, decreased performance, etc.
2. The tendency to form vapor condensation (droplets) and mold on the ceilings and walls is not deteriorated.
3. Thanks to adequate ventilation is avoided the gradual carbonization and weakening of the concrete that can occur when there is an increased concentration of CO2 in the building because of poor ventilation.
Filling capacity of cavities and cracks: Excellent, without leaving any gaps between the bricks or stones, even when they have cavities.
Solubility in water: The resin is dissolved in water, but this is unnecessary, it may be added to the blend as it is.
Waterproofness: Very good. No additive material may provide itself perfect waterproofness in the mass in which participates also water, as during drying of water is prevented cracking of the mass, however inevitably are created very small pores. To ensure absolute waterproofness of the mass, after drying, there should be a coating with a roller or a brush or spraying, to seal these pores, with Betostal F/18.
The reduction in water permeability of the mass is proportional to the amount of resin to be added to the mixture of cement and sand and inversely proportional to the amount of water.
Hydrophocity and oleophobicity: The polymerized resin itself is waterproof, but the concrete mass in which is diffused is not completely waterproof and is certainly not hydrophobic. To be achieved hydrophobic and oleophobic surface of the mass further of waterproofness, it is required a coating with Contraqua 7/50. For better adhesion of Contraqua 7/50 it can optionally be preceded by a coating with a resin of high adhesion (Betostal F/18) or high adhesiveness (Sovaplex DS), which functions as a primer, although the additive   Betostal SLN generates by itself very good conditions for the adhesion of Contraqua 7/50.
6. Satisfied customers
Customer List: A list of satisfied customers with phone numbers and names of responsible persons, who are willing to convey you their positive experience with the product.
Applications descriptions: Descriptions of product applications at our customer sites, consisting of the following sections:

  1. detailed description of the problem or problems that the customer faced
  2. description of the solution or solutions we applied
  3. ways in which the customer found out that  the application was successful
Recommendation letters Recommendation letters of satisfied customers who by means of the product finally solved some problems for which they until then had not found any solution
Frequently asked questions and customer objections: Please click here  to find answers on any questions, doubts and objections that are often raised by potential buyers of the product, together the valid responses received on various issues, the most important of which are:­

  • ­the working principle of the product
  • ­its reliability and efficiency
  • ­its lifetime
  • ­health and safety during its use
  • application method
  • ­special circumstances which render doubtful the success of the application
  • after sales service
7. Market information
Packaging, price,
For packaging, pricing and coverage, please click here.
Guarantee: For information regarding the guarantee of WINWET products, please click here.
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