Sika -1 Waterproofer

£113.86 £94.88
In stock

Sika -1 Waterproofer

Colour: Yellow

The Sika -1 Waterproofer solution contains complex colloidal silicates which swell in the presence of water, blocking the capillaries and pores in cement, screeds and mortar to provide an effective barrier against the transmission of liquid water.

• 90 years track record
• Type A waterproofing system according to BS8102- 2009
• Proven resistance to hydrostatic back pressure
• Fully bonded waterproofing barrier  
• Can be applied to wet substrates
• For use on concrete, brick and structural blockwork
• Can be used internal and externally
• Can be applied to wall, floors and soffits
• Quality controlled system
• Used for negative or positive water pressure situations

  • Approximate Coverage 0.75 Litres per 25kg cement as general waterproofer

• Internal waterproofing of below ground structures to meet the requirements of BS8102 – 2009 Grades 1 - 3.
• Waterproofing of swimming pools and other water retaining structures.
• Waterproofing of basements, cellars and vaults.
• Waterproofing of tunnels.

Mixing Instructions
Place a the correct amount of gauging solution into a mixer and add the mortar and mix until for gauging liquid has been evenly dispersed, approximate 3 minutes. The Sika 1 pre-bagged waterproofing system should be mechanically mixed using a forced action mixer or drill and paddle mixer to limit the amount of air entrapment and to ensure thorough dispersion of the Sika 1 Liquid Admixture. A tumble mixer is not suitable for mixing.

More Information
Brand Sika


ean 7425715137101
Best Seller No
Recently Added No
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Delivery & Returns

Delivery & Returns

Delivery Information - What does your delivery option mean?

All deliveries are subject to stock and availability.

UK Mainland

**Next Day Cut Off – subject to cleared payments and passing of payment security checks by 11am.

Orders processed after 11am using the next day service option cannot be guaranteed.

All UK Mainland orders qualify for FREE delivery* when you spend over £150 ex VAT. *Please note certain items do not qualify for free delivery. 

Consignments will be delivered using DX, DPD, APC, Hermes or direct from the supplier if stock is not readily available within our warehouse.

Please note that orders placed on a Friday after 11AM for next day delivery will be dispatched on the following Monday for delivery on Tuesday.

Orders placed prior to a Bank Holiday will be delivered two days after the Bank Holiday.

Delivery Options

Price (inc vat)


Next Day Delivery


Monday - Friday, excluding public holidays. Order before 11AM for delivery the next working day.

2-7 Working Day Delivery 


Monday - Friday, excluding public holidays. 

FREE Delivery over £180 (2-7 Working Days)


Monday - Friday, excluding public holidays.

Unfortunately, We Cannot Guarantee Next Working Day - you will be notified if we can't fulfill this. 

Outside UK Mainland (Including Ireland)

*Please note the following postcodes are classed as Non-Mainland UK or Remote / Rural delivery: AB, IV, KW, PA, PH, HS, KA, ZE, PO30-PO41, IM, JE, GY, BT, TR21-TR25.

Regardless of the order weight and quantity, the following locations incur a carriage charge of £24.99 INC VAT


It is advised you arrange your own courier collection from our warehouse. If you require assistance Dortech Direct can schedule a delivery for you. Prices are dependent on box quantity and order weight. Please call our sales team for a quotation on 0330 1281212.

Please Note

  • All available delivery options will be displayed at checkout / basket pages
  • Working days do not include Weekends or Bank holidays
  • For all enquiries ring 0330 1281212 /

BACS & Purchase Orders

  • The delivery times & dates are only valid from receipt of funds or valid PO number


By ordering with Dortech Direct you agree to inspect goods upon delivery. Damaged goods should be rejected. If you notice damage after goods are delivered, you must report this to us within 48 hours of delivery. Dortech Direct does not accept damage liability for issues reported over 2 working days from the point of delivery.

You can report damage by sending your order details and images of any issues to


If you need to return a product within 14 days, we are happy to refund the product provided it is returned, as sold, with all the original packaging, tags, labels and accessories.

Prior to returning any goods for any reason, please fill in the Returns Form and put it in your package that you are returning. 



Is there a re-stocking fee?

Please note some orders are subject to up to a 35% restocking fee. While every effort will be made to avoid this charge in some cases it is un-avoidable.This charge represents the administrative time and overheads to reprocess the stock. 

I've sent my package, how long will the refund take?

We aim to make the returns process as quick as possible, but please allow up to 14 days for your refund to be processed. If you haven't received any information after this time, please get in touch with one of our team.