The Power of Sika 158 Fast Primer
2-3 hours drying time
10mm nap roller

In the realm of construction and building maintenance, addressing moisture in concrete under timber floors has long been a challenge for professionals. Enter Sika 158 Fast Primer, a breakthrough solution designed to effectively mitigate moisture issues while adhering to the highest standards of safety and performance.
Here at VCS, we have been strong supporters of the Sika products for the simple reason that they engineer products that will work across a broad range of industries. They are real life solutions to real life challenges and timber flooring can offer some challenges given the fact that solid timber can expand and contract. In fact, Australian Timber, has a particularly dense structure as they can expand significantly. Using moisture barriers and adhesives that can control the flow of moisture intrusion from below is extremely important. Sika 158 plus T55 Adhesives offer the solution with solid timber.
Low VOC
One of the standout features of Sika 158 Fast Primer is its Very Low Volatile Organic Compounds (VOCs) content, which ensures not only compliance with environmental regulations but also promotes a healthier indoor air quality. As we navigate an era that prioritizes sustainability, it is crucial to utilize products that contribute positively to our environments.
Moreover, this primer excels in moisture control—boasting an impressively low Moisture Vapour Transmission rate of just 3.7 gm/m²/24hrs, as per ASTM E96. Such performance makes it an exceptional choice for areas where moisture resilience is paramount, offering peace of mind to homeowners and contractors alike.
User Friendly
Sika 158 Fast Primer is water-based, making it user-friendly and straightforward to apply. Its Green Star Certification further attests to its environmentally responsible attributes, ensuring that you’re not just protecting your flooring but also championing eco-conscious practices.
The application process is remarkably streamlined, requiring only a single coat on most substrates. Its solvent-free formula means that storage is simplified and safer, eliminating concerns associated with dangerous goods (DG). With very low odour during application, it enhances the overall experience for both the applicator and the occupants of the space.
Functionality is at the core of Sika 158 Fast Primer’s design. It penetrates porous construction materials effectively, solidifying its position as a go-to solution for various substrate types. The easy mix ratio of 2:1 A-B not only simplifies application but also ensures you achieve optimal performance every time.
Fast Drying
The rapid drying time of just 2-3 hours at 23°C significantly reduces downtime on projects, allowing for faster progress without compromising quality. Furthermore, its highly fluid consistency makes application an uncomplicated task, ideal for both seasoned professionals and those new to the field.
When facing challenging moisture conditions, rest assured that Sika 158 Fast Primer has been tested to resist up to 4 bar negative water pressure—a testament to its strength and durability. Moreover, it is suited for use with underfloor heating, providing versatility that enhances its applicability across a range of projects.
In conclusion, Sika 158 Fast Primer stands as a definitive answer to the moisture management challenges posed by concrete substrates. With its innovative features, commitment to sustainability, and user-friendly characteristics, it is not just an option; it is the authoritative choice for professionals looking to deliver excellence in every project. Choose Sika 158 Fast Primer—where quality meets performance, and sustainability drives innovation.





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