SKU: 66146295244

Coprox Waterproof Cement Additive (Prices from)

Sale price$121.50 Regular price$135.00
Save 10%

Pay in installments of $33.75 with ShopPay, AfterPay and Klarna

Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Aug 16 - Aug 21

Promo Codes Available:

For Your Every Summer RSVP, with Code: SUMMER15

Description

Coprox Waterproof Cement Additive (Prices from)Prevents Rising, Falling & Penetrating Damp Additive to Mortar, Screed, Unreinforced Concrete and Plaster Remedy for Leaks Coprox Waterproof Cement Additive is an excellent primary waterproofing when mixed with mortar, screed, unreinforced concrete or plaster. It is an essential ingredient in the construction of structural, retaining and boundary walls, floors, showers, basements, wine cellars, underground parking, ponds, swimming pools, reservoirs

  • Prevents Rising, Falling & Penetrating Damp
  • Additive to Mortar, Screed, Unreinforced Concrete and Plaster
  • Remedy for Leaks

Coprox Waterproof Cement Additive is an excellent primary waterproofing when mixed with mortar, screed, unreinforced concrete or plaster.

It is an essential ingredient in the construction of structural, retaining and boundary walls, floors, showers, basements, wine cellars, underground parking, ponds, swimming pools, reservoirs and water features for the prevention of rising, falling and penetrating damp.

Coprox Waterproof Cement Additive is also an excellent remedy for the plugging of leaks.

 

 

INSTRUCTIONS

Primary Waterproofing

  1. Add 2,5 kg Coprox Waterproof Cement Additive to every 50 kg of cement used in any mortar, screed, concrete or plaster mix.
  2. Ensure recognized building mix ratios are adhered to.
  3. Mix dry ingredients thoroughly.
  4. Add required quantity of water to the dry mixture using recognized building mix standards.
  5. Mix wet ingredients thoroughly before use.

Plugging Leaks

  1. Dovetail the leaking spot with a chisel to a depth of about 50 mm and clean thoroughly.
  2. Mix one part Coprox Waterproof Cement Additive with two parts of clean fine plaster or silica sand by volume, e.g. 1 cup Coprox Waterproof Cement Additive to 2 cups sand. Add a little water and mix until a putty like consistency is achieved.
  3. Wear protective gloves and knead well for about half-a-minute.
  4. Relieve the main water flow by inserting a piece of hose into the dovetailed cavity.
  5. Pack the plugging mixture firmly around the hose to keep it in place.
  6. Level the plugging mixture with the surrounding surface.
  7. Allow to dry for approximately 1 hour.
  8. Mix a fresh quantity of plugging mixture.
  9. Have a dowel stick approximately the same diameter as the hose ready for use.
  10. Carefully remove the hose using a twisting motion.
  11. Force the plugging mixture into the hole and apply pressure with the dowel stick for about 1 – 2 minutes.
  12. Remove the dowel stick.
  13. Fill the remaining void with the plugging mixture.
  14. Allow to dry for approximately 2 hours.
  15. Apply two coats of Coprox Masonry Waterproofing.


Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 66146295244

Discover Niche Categories That Outsell

Top-Converting Item to Boost Your Average Order

4.4 ★★★★★
Based on 24 reviews
Sort
Highest Rating
Newest First
Oldest First
Product Reviews
G
Verified Purchase
Galpin
Chelsea, US
★★★★★ 5
It’s a perfect size and pretty
Color: Beige, Size: 2 Layer
It fits perfectly and keeps everything organized I love it!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 16, 2026
J
Verified Purchase
Jennifer Stephens
Dallas, US
★★★★★ 5
Five stars
Color: Beige, Size: 2 Layer
I recommend buying this product again. I only shop with Amazon.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 27, 2026
C
Verified Purchase
Christine Ellis
Los Angeles, US
★★★★★ 5
Novelty quality plastic, gorgeous color, and sturdy
Color: Purple
I was a little surprised when I took it out of the pkg. It seemed flimsy. It holds whatever I put in any position, perfectly balanced.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 12, 2026
C
Verified Purchase
C.Blackman
Natrona Heights, US
★★★★★ 4
Plastic key holder
Color: Black
A little light as it is plastic, but it does the job
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 16, 2026
A
Verified Purchase
A.Daniels
Waukegan, US
★★★★★ 5
Great for keys
Color: Black
I haven’t misplaced my keys since I bought it. I do wish it were a little heavier in weight but it gets the job done
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 15, 2026

recommand products