ANTI-HYDRO PRODUCTS
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The "one & only" since 1904

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FOR PERMANENT CONCRETE

95% OR GREATER HYDRATION!

Learn more about hydration
For over 120 years, Anti-Hydro Products, LLC has been integrally waterproofing many concrete and masonry structures all over the globe. The success of our flagship product Anti-Hydro AH-1 or "AH-1",  has been attested not only by the commercial recognition accorded by its uses in many prestigious projects worldwide, but also by tests performed by many governmental agencies and accredited independent laboratories.

​​Invented and developed in 1900 in the laboratories of Stevens Institute of Technology in Hoboken, New Jersey.
​AH-1 was the ground breaking integral waterproofing compound and has remained unchanged for more than 120 years.

A testament to its proven
waterproofing ​efficacy,
​reliability and durability.​

AH-1 is a combination of organic and inorganic chemicals that reacts with Portland cement to produce more complete hydration. Water requirements, bleed water and shrinkage are reduced. The increased hydration provides internal curing and a much harder cement paste.  AH-1 increases the early and ultimate strength of concrete. These combined reactions produce impermeable concrete that is hard and non-dusting.

AH-1's primary function is the waterproofing of concrete. The true advantages go far beyond the waterproofing. Anti-Hydro reacts chemically with Portland cement increasing the hydration percentage of the cement by as much as 30%.  The morphology of the concrete is altered significantly reducing the porosity and eliminating the migration of liquid and gas into or out of the set concrete. The changes at the molecular and structural level created by the use of AH-1 provide incredible benefits.

AMERICAN MADE

WITH​ AMERICAN PRIDE

OUR PRODUCTS

Concrete/Masonry Products ​and ​Problem Solving
Worldwide Since 1904

ANTI-HYDRO® AH-1

ADMIXTURE FOR WATERPROOFING,
INCREASED HYDRATION, COMPRESSIVE,
​FLEXURAL & TENSILE STRENGTH
AH-1 (ANTI-HYDRO)
Increases the early & ultimate strength of concrete.
​These combined reactions produce impermeable
concrete ​​that is hard and non-dusting.
MORE INFO

PROCAST® ​PC-1 ​

HIGH PERFORMANCE ALL-IN-ONE
ADMIXTURE ​FOR PRE-CAST CONCRETE​
​
PC-1 PROCAST AP
Provides higher strength, extreme low absorption,
improved abrasion resistance & protection against
freeze-thaw damage for ​architectural
​or decorative precast concrete.
MORE INFO

HYDROCAP ADMIX® HA-1 ​

HIGH PERFORMANCE ADMIXTURE FOR
​INTEGRAL CRYSTALLINE WATERPROOFING
​

HA-1 HYDROCAP ADMIX
A unique crystal-forming dry admix that has been
successfully used for many decades to integrally
​waterproof concrete/masonry and improve durability.
MORE INFO

HYDROCAP POWDER® HP-1 ​

CRYSTALLINE SLURRY COAT 
FOR SURFACE WATERPROOFING
​

HP-1 HYDROCAP POWDER
A crystal-forming waterproofing slurry coat dry
premix that has been widely used over many
​decades for waterproofing concrete or masonry.​
MORE INFO

THROUGHOUT THE ENTIRE WORLD ARE
MONUMENTS OF ARCHITECTURAL BEAUTy
WHERE 
ANTI-HYDRO PRODUCTS HAS
PLAYED AN IMPORTANT ​PART IN THE
PRESERVATION OF CONCRETE WORK.

CHRYSLER BUILDING 3D
CHRYSLER BUILDING
SEARS/WILLIS TOWER 3D
SEARS/WILLIS TOWER
HEARST TOWER 3D
WALDORF ASTORIA NYC
EMPIRE STATE BUILDING 3D
EMPIRE STATE BUILDING
 For over one hundred twenty years it has been in continuous use, AH-1 has been specified for permanently hardening and waterproofing concrete for every type of structure. Government buildings, where careful comparative tests have been conducted, are no exception. Sureness as well as permanence are the two words which best characterize AH-1 results. You write them both into your specification when you specify AH-1.

By specifying AH-1 you not only select a tried and proved material for your client, but you also indicate to the contractor your preference for a material which, by its very performance, has removed all doubt from the results you expect from him.
 
When a material is so inherently good, and so honestly
dependable as to score over a one hundred twenty year
track record of continuous success, ​you can make ​​no
mistake ​in ​recommending it to your clients.
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​© 2025 Anti-Hydro Products LLC. ​
​All Rights Reserved.
​Anti-Hydro, Original AH-1, Procast PC-1, Hydrocap Admix HA-1, Hydrocap Powder HP-1 are trademarks or registered trademarks of Anti-Hydro Products LLC.

100% USA MADE

  • Home
  • About
  • PRODUCTS
    • Original AH-1
    • Procast PC-1
    • HydroCap Admix HA-1
    • HydroCap Powder HP-1
    • All Products
  • Why Anti-Hydro?
  • Resources
  • Contact