Sika 1 Waterproofer Water Proofing Admixture 25 Litre SK1WAT25 114449

Brand: Sika
 QR29716 |  In Stock

  • RRP£405.60 Inc. VAT
  • OUR PRICE £192.42

    £230.90   Inc. VAT
  • Product Code: SK1WAT25
  • SKU: 114449
  • EAN: 5055047200123
  • MPN: 

25 Litre Trade Deal Money Saver

Sika 1 Waterproofer Water Proofing Admixture 25 Litre

MPN: SK1WAT25

Sika Code: 114449

Barcode: 5055047200123


Due to Health and Safety Carrier limitations

May come as 5 x 5 litre or 1 x 25 litre depending on postcode


Sika 1 Waterproofer – Waterproofing Admixture – 25 Litre Trade Deal Money Saver

The Sika 1 Water-Proofer – 25 Litre Trade Deal Money Saver is the ultimate solution for professionals seeking a reliable and economical waterproofing admixture for large-scale projects. This high-performance product is specially formulated to provide integral water resistance in concrete, render, and mortar, ensuring long-lasting protection against water ingress. Its proven formula penetrates deeply, creating a watertight seal that enhances structural durability and integrity.

Sika 1 Water-proofer Water-Proofing Admixture 25 Litre Liquid additive which prevents transmission of water through sand or cement renders, screeds and mortar.

Sika 1 25 Litre is an aqueous solution containing complex colloidal silicates in the presence of water these swell and block the capillaries and pores

in the applied sand/cement renders, screeds and mortar to provide an effective barrier against the transmission of liquid water.

The 25-litre container offers exceptional coverage, making it ideal for trade professionals managing extensive waterproofing tasks in basements, tanks, swimming pools, retaining walls, and more. This bulk size ensures significant cost savings while maintaining the trusted quality of Sika 1 Waterproofer.


Sika 1 Waterproofer Key Features:

  • Integral Waterproofing: Provides water resistance throughout the concrete or mortar mix.
  • Cost-Effective Trade Deal: Bulk 25-litre size offers excellent value for large-scale applications.
  • Long-Lasting Protection: Protects against water ingress, ensuring structural longevity.
  • Wide Application: Ideal for use in concrete, render, mortar, and screeds.
  • Professional-Grade Quality: Trusted by industry professionals for over 100 years.
  • Characteristics and Advantages:

    • Proven for more than 90 years
    • Pre batched system mortars available
    • For brick, concrete and stone substrates
    • Compatible with OPC and SRC
    • Can be applied against live water infiltration
    • Wall render and screed application
    • Can be used internally and externally
    • Resists Water Pressure

Also Available:

Sika-1 Waterproofer 5 Litre Singles


Sika 1 Water-Proofer Applications:

  • Basements and Retaining Walls: Prevents water ingress and enhances structural stability.
  • Tanks and Swimming Pools: Ensures watertight integrity for water-retaining structures.
  • External Renders: Protects building exteriors from moisture penetration.
  • Tunnels and Substructures: Ideal for heavy-duty waterproofing requirements.
  • Sika 1 Uses:

    • Structural waterproof screeds to resist water pressure below ground
    • Waterproof renders to resist moisture and dampness above ground level Internal waterproof tanking
    • General waterproofing admixture for mortar
    • Part of the Sika Watertight Concrete system see separate BBA certificate and data sheet for basements cellars vaults replastering after DPC injection.
    • General Waterproofing Admixture for Both Above and Below Ground Applications For Brick Concrete and Stone Substrates - Can Be Used for Wall Render and Screed Application

Why Choose This Trade Deal Money Saver?

  • Exceptional Value: The 25-litre drum reduces costs for trade professionals managing large or ongoing projects.
  • Trusted Performance: Proven effectiveness across a wide range of waterproofing applications.
  • Convenience: Bulk size minimizes the need for frequent purchases, streamlining project workflows.

How to Use Sika 1:

  1. Prepare the Mix: Add Sika 1 Water-proofer to the water before mixing with concrete, render, or mortar.
  2. Follow Recommended Ratios: Ensure correct dosage for optimal waterproofing performance (refer to packaging instructions).
  3. Mix Thoroughly: Blend until the admixture is evenly distributed throughout the material.
  4. Apply as Needed: Use the treated material for your waterproofing project, following standard application techniques.
  5. Allow to Cure: Let the mix cure properly to ensure maximum water resistance.

Questions and Answers:

FAQs Sika 1 Waterproofer – 25 Litre:

1. How much area does a 25-litre container cover?
Coverage depends on the application and mix design, but a 25-litre container is sufficient for large projects or multiple small applications.

2. Is it suitable for swimming pools?
Yes, it is ideal for creating watertight concrete or mortar in swimming pools and tanks.

3. Can it be used in exterior renders?
Yes, it provides excellent protection against moisture ingress in external renders.

4. Does it affect the strength of the concrete?
No, it enhances the durability of the mix without compromising its strength.

5. How often should it be reapplied?
Sika 1 is designed to be a permanent waterproofing solution when correctly applied.

6. Can it be used for DIY projects?
Yes, but it is most suited for professionals due to its bulk size and trade-focused benefits.

7. Is it environmentally friendly?
Sika 1 is formulated with environmental safety in mind; however, proper handling and disposal are recommended.

8. Does it work with other admixtures?
It is advisable to consult the product documentation to ensure compatibility with additional admixtures.

9. Why is this size ideal for trade professionals?
The Trade Deal Money Saver offers significant cost savings and convenience for bulk usage in professional applications.


The Sika 1 Waterproofer – 25 Litre Trade Deal Money Saver is the go-to choice for contractors and trade professionals seeking an efficient and cost-effective waterproofing solution. Its bulk size, proven performance, and versatility make it an indispensable product for large-scale and high-demand waterproofing projects.


"Always read the Technical Datasheet prior to first use to ensure you have the correct information and  product for your application"


See All Sika Products

Data
Manufacturer Sika
Reference Code SK1WAT25
Reference Code sika 114449
Type Waterproofer
Size 25 Litre
Name Link
Sika 1 Waterproofer Safety Data Sheet Download Attachment
Sika 1 Waterproofer Technical Data Sheet Download Attachment

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