Polyurethane Liquid Waterproofing Systems

Liquid Roofing Systems | PU Sealant and Adhesives | Industrial Floor Coatings | DPM | Tanking Solutions

Polyurethane Liquid Waterproofing


Alchimica® Building Chemicals are the world’s leading manufacturer of polyurethane liquid waterproofing membranes and PU Sealant technologies for the construction industry.

For nearly 40 years, architects, specifiers and contractors in 65 countries across 5 continents have chosen us for our product innovation, advanced systems & technologies and world class research & development laboratories. Our range includes liquid roofing systems, polyurethane sealants and adhesives, green roofing solutions, cementitious repair systems, DPM and tanking solutions. 

Who We Work With

Architects & Specifiers

Architects & Specifiers

Our products can enable you to utilise space and maximise your plans on your next project.

Building & Roofing Contractors

Building & Roofing Contractors

Cut work time and labour costs with our fast curing and easy to apply products, meaning you get the job done quicker!

Retail & Distribution

Retail & Distribution

Our retail networks are amongst the best in the country with excellent stock levels & fast delivery.


We are producers of advanced polyurethane liquid waterproofing membrane systems and sealant technologies that are used extensively across the world. Through extensive research and development, and product innovation we have developed solutions with ease of application in mind, without compromising any of our renowned performance or quality. Our range of liquid systems includes solutions for projects like those below. Please also visit the Products section where you can find the right products for your requirements.

Liquid Roofing Systems

Green-Roof / Inverted Roof Membrane

New and Existing roof Waterproofing

Terrace and Balcony

Car Parks

Foundations / Underground Structures

Sewage Tanks

Swimming Pools

Bridge Deck Waterproofing

Industrial Floor Coatings

Aliphatic Top Coats

Advanced Water-Based Polyurethanes

Drinking Water Tanks

PU Sealants


Liquid Damp Proof Membranes

Wood Floor Adhesive

Tile Adhesive

Rubber Binder

Case Studies

Please check out some of our case studies showcasing our products in use in various situations and applications around the world.

Beautiful Balcony in Romania

The Alchimica Hyperdesmo system is used all over the world

Reducing The Effects Of UHI

An Urban Heat Island is a built-up or metropolitan area in

Oxford Tower Roof Repair

Here’s a video showing how the Hyperdesmo system was used

£4500 Job That Cost Just £600!

One of our approved contractors recently got in touch about a job

About Alchimica

For  nearly 40 years, Alchimica® has successfully provided products and services to architects, engineers, home builders, contractors and building owners worldwide. As a result, we've become known as the Worlds leading manufacturer of polyurethane liquid waterproofing materials. Our UK office is based in Pembrokeshire and serves the whole of the United Kingdom and Ireland. Similarly, in addition to the many products that carry our recognised name and branding, we also produce private label materials for a number of companies throughout the region to specific individual requirements.

"Hyperdesmo was the ideal solution for the job. Quick and easy to apply and very reasonably priced too."

Les Smith

LS Roofing

I have used several Alchimica products in the past and I keep coming back to them. Reliable, outstanding performance and fantastic prices. Thanks!

Chris J

CJ Waterproofing

I used Hyperdesmo HAA and Particular on a tricky job which combined with the great advice provided by the team at Alchimica resulted in a successful outcome and a satisfied customer. Cheers!

W Simpson

Simpson & Son Waterproof & Damp Proofing

For more information on our products please get in touch...