Alchemco

Call Directions Website Contact the business

Alchemco Concrete waterproofing with ETT. Parking garages, bridges, rooftops and tanks in 40+ countries.

Six leaks. One budget. Which goes first?Most teams rank leaks by how bad they look, and that’s the least reliable way to...
10/12/2026

Six leaks. One budget. Which goes first?

Most teams rank leaks by how bad they look, and that’s the least reliable way to do it. A dramatic stain in a plant room can wait. A slow seep above a switchboard can’t.

Rank by consequence and trajectory instead:

Safety, electrical and compliance risks. These go first, whatever their size.
Anything getting worse. Compare against the last inspection. A leak that grew over the past 18 months will keep growing.
Anything getting harder to reach. Access rarely gets cheaper with time.
Shared causes. A single drainage fix can close out four findings at once.
Stable, accessible, low-consequence leaks. Monitor these, and set a threshold that moves them up the list if it’s crossed.

The exact order matters less than being able to explain it. A ranking you can defend is the one that survives the budget meeting.

How do you do the ranking?

"No shutdown available" doesn't mean nothing can be done.It's often treated as the end of the conversation. It usually i...
10/09/2026

"No shutdown available" doesn't mean nothing can be done.

It's often treated as the end of the conversation. It usually isn't. What it changes is which side of the structure you work from, and what you can actually verify.

What's usually still possible while the structure is in service:

Negative-side treatment: working from the dry face, wherever it's accessible.
Joints and penetrations above the water line: anything above operating level can be repaired normally.
External drainage: correcting drainage around the outside of the structure.
Source control: dealing with surface water, run-off, poor grading and leaks from adjacent services.
Monitoring: tracking leakage rates, crack movement, moisture readings and thermal imaging over time.
Partial isolation: where the structure has separate cells, bays or built-in redundancy, taking one section out at a time.

What isn't possible: inspecting the submerged face, or testing the repair under the conditions that actually matter.

So the realistic approach is staged. Do what you can now. Monitor deliberately, not just occasionally. And use that data to build a specific, ready-to-go scope for the first shutdown window that does open, so you're not arriving on day one and starting the survey from scratch.

Treat "no shutdown" as a scope constraint, not a reason to stop.

Counterintuitive, but common, and usually informative rather than mysterious.There are few mechanisms worth checking bef...
10/07/2026

Counterintuitive, but common, and usually informative rather than mysterious.

There are few mechanisms worth checking before assuming a new defect has appeared:

Thermal movement. Higher temperature ranges open and close cracks and joints. A path that's closed in one season can open in another.
Drying shrinkage in adjacent elements, creating movement at the interface.
Groundwater lag. Water tables respond slowly. The peak head may arrive weeks after the rain stopped.
Operational change. Reduced flow, different levels, a valve or bypass arrangement that only runs in certain months.
Evaporation rate. Water was always arriving; in wetter months it never reached a face dry enough to show a stain.

The practical consequence: a single inspection in one season describes one set of conditions. Crack assessment and leak investigation get considerably more reliable when they're repeated across the range.

Have you experience seeing leaks and watermarks during dry season?

Where to start? Probably not with a product. The first decisions are about what you're working with and what you're allo...
10/05/2026

Where to start? Probably not with a product. The first decisions are about what you're working with and what you're allowed to disturb.

A workable sequence:

1. Establish the exposure that's actually operating now. It may not be the exposure the structure was designed for — drainage has changed, use has changed, the surroundings have changed.

2. Find out what's on the surface. Coatings, sealers, previous treatments, patches. This narrows the options more than anything else.

3. Map what's already been repaired, and whether it held. Previous work changed the water's route. Today's leak may be the second exit.

4. Establish reinforcement condition and cover. This determines whether you're protecting sound concrete or managing active corrosion — two different projects.

5. Only then consider systems. By this point the shortlist is usually short.

Skipping to step 5 is common, fast, and the most frequent reason a retrofit underperforms.

Characterise the structure before you shortlist for it.

When a system covers more area per unit, the saving isn't mainly on material. It's on everything that scales with the nu...
09/30/2026

When a system covers more area per unit, the saving isn't mainly on material. It's on everything that scales with the number of passes:

Fewer containers handled, mixed and moved to position
Less time on elevated or confined-space access where the cost per hour is highest
Fewer material deliveries and less site storage
Less waste and less disposal
Fewer days exposed to weather delay
Shorter reconciliation, meaning coverage against area placed is simpler to verify

ETT achieves more are coverage in a single application, which on a large deck or tank wall is the difference between one mobilisation and several.

One caution worth keeping in the post: a high coverage rate only holds if it's actually achieved on site. High coverage saves labour. Reconciled coverage proves it.

It is one of the most commonly used words in a waterproofing scope and one of the least commonly defined.Depending on th...
09/22/2026

It is one of the most commonly used words in a waterproofing scope and one of the least commonly defined.

Depending on the project, it has been understood to mean:

No visible water
No visible water under specified head for a specified duration
No measurable flow, with damp patches permitted
A maximum permitted leakage rate
Drop-test criteria for a liquid-retaining structure
"It passed when the owner accepted it"

These are not the same standard, and they do not produce the same cost, the same detailing, or the same testing regime.

To us, “watertight” means more than passing a test. It means preventing water leakage through the structure, protecting the concrete, and maintaining that performance over time.

Disputes often trace back to the moment this word entered the documents without a test method, an acceptance threshold, and a defined observation period attached to it.

That white deposit is evidence of a transaction that already happened.Water moved through the concrete, dissolved solubl...
09/18/2026

That white deposit is evidence of a transaction that already happened.

Water moved through the concrete, dissolved soluble compounds on the way, reached a face, evaporated and left the solids behind. Which means it is telling you three things at once: there is a moisture source, there is a connected pathway, and evaporation is occurring at that face.

The useful distinction is primary versus secondary. Primary efflorescence appears early, driven by the mix water leaving new concrete, and typically diminishes. Secondary efflorescence is fed by water entering from outside the concrete, and it returns.

So the diagnostic questions are simple:
Does it come back after cleaning? Does it track a crack, a joint or a cold-joint line, or is it spread across the field? Does it change with the season or with operations? Is it accompanied by staining, damp haloes or rust bleeding?

Have you had the same experience? Share your photos with us!

What happens when water enters concrete?It rarely stops at the surface.Water moves through available pathways, carrying ...
09/02/2026

What happens when water enters concrete?

It rarely stops at the surface.

Water moves through available pathways, carrying chlorides and other contaminants deep into the concrete matrix. From there, reinforcement corrosion can begin. As corrosion expands, it builds internal pressure that may lead to cracking, delamination, and spalling.

What starts as moisture intrusion can become a costly durability issue.

The good news: early protection helps reduce future deterioration and extend service life.

Where do you see water intrusion cause the most damage—parking decks, bridge structures, tanks, or building facades?

Most waterproofing arguments are not really about products.They happen because the structure was never fully diagnosed b...
08/31/2026

Most waterproofing arguments are not really about products.

They happen because the structure was never fully diagnosed before a system was chosen — and every party is then defending a decision made on incomplete information.
Five questions, answered honestly, remove most of that risk:

Which side is the water on? Is it pressure or vapour? Is the crack moving? What is already on the surface? What has already been tried?
None of these require laboratory equipment, four of them can be answered in a single site visit with a crack comparator, a spray bottle, a camera and the project history.

Which of the five is hardest to answer on your projects — and what do you do when the answer is simply unavailable? We read every comment on this one, share your thoughts!

A successful mock-up is not simply an area where the product was applied without difficulty.It should represent the actu...
08/25/2026

A successful mock-up is not simply an area where the product was applied without difficulty.
It should represent the actual substrate, environmental conditions, preparation method, application sequence, and critical details expected during construction.

Before work begins, the team should agree on:
The question being evaluated
Representative test location
Baseline condition
Installation variables
Required documentation
Acceptance criteria
Observation period

Without these controls, the mock-up may demonstrate constructability while providing little evidence about anticipated performance.

Planning a pilot application? Tell us what your team needs to verify, and we can help structure a meaningful evaluation.

Address

3532 Mayland Court
Henrico, VA
23233

Telephone

+18006102895

Website

Alerts

Be the first to know and let us send you an email when Alchemco posts news and promotions. Your email address will not be used for any other purpose, and you can unsubscribe at any time.

Contact The Business

Send a message to Alchemco:

Shortcuts

Share

Category