$439.95 $405.00

In stock

Northern TILE Distributors

Efflock is a high performance additive for cement based building materials to repel damp and lock efflorescence.

What causes efflorescence?

Efflorescence is caused by water entering masonry. Water travels through the pores and dissolves soluble salts. In cement paste within concrete and mortar, the most problematic salt is known as 'free lime' (calcium hydroxide). Calcium hydroxide deposits then absorb carbon (carbonation), and become extremely stubborn to remove.

Efflorescence can also occur from atmospheric deposits or inherent salts in clay and aggregate. Efflorescence from inherent salts is often observed on face brickwork.

How does Efflock prevent efflorescence?

The product creates a water repellent molecular structure within the pores of concrete. Should any small amount of moisture be absorbed, it allows the controlled release of moisture while preventing salts from migrating to the evaporation point.

How long does Efflock take to cure?

The product cures with the hydration of the cement. Inclement weather should be avoided for 24 hours.

Does Efflock affect the adhesion of other materials?

Applying it does not change the appearance of any materials, and will not cause detrimental effect to the bond of subsequent adhesives or other coatings.

1L, 5L & 20L
1 litre of Efflock is sufficient for approximately 16m2 of tiling, comprising 40mm thick tile screed, tile adhesive and tile grout based on a 300 x 300 x 10mm floor tile.
pdf icon Efflock Water Repellent

Returns Policy

You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).

If you need to return an item, simply login to your account, view the order using the 'Complete Orders' link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.


We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.

When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.

Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.