PolyureaProtective Coatings

Field reference / polyureaprotectivecoatings.com

Built to take the hit.

Tanks, walls, roofs, floors and infrastructure take abuse every day. A plain reference on how protective coating systems hold up, and what to ask before you specify one.

Applicator spraying a protective coating across a wide black membrane on an open site
Fig. 01 A thick, seamless membrane going down in a single visit.
  1. 01Threats
  2. 02Coating systems
  3. 03Substrates
  4. 04Spec builder
  5. 05Polyurea for protection
  6. 06Surface preparation
Black coated flood wall running along a wide riverbank

Seamless. Elastic. Bonded to the surface.

A protective coating is a promise that the surface underneath will still be there next year. Keeping it takes the right material, the right preparation and the right crew on the same job.

Five layers

Protection comes in layers

The membrane gets the attention, but it only works when every layer beneath it is right.

See the coating system
  1. 01

    Substrate

    The surface being protected: concrete, steel, block, wood or an older coating. Its condition sets the rest of the plan.

  2. 02

    Preparation

    Cleaning, repairing and profiling the surface by grinding, blasting or pressure washing so the system can bond.

  3. 03

    Primer

    A thin layer that seals porous surfaces, controls outgassing and improves adhesion. The data sheet says when it is required.

  4. 04

    Base membrane

    The thick, tough layer that does most of the protecting. Spray polyurea is often applied here in one or more passes.

  5. 05

    Topcoat

    An optional finish for colour stability in sunlight, texture for grip or extra chemical resistance.

Interactive

Pick a layer, see its job

Select a layer of the system to see what it does and why it matters.

The thick, tough layer that does most of the protecting. Spray polyurea is often applied here in one or more passes.

Read about coating systems

Six threats

Six ways surfaces fail

Every job starts with the same question: what is trying to break this surface down?

Close view of a black textured coating surface

Abrasion

Wheels, boots, gravel and flowing slurry grind surfaces down a little at a time.

Abrasion
Gray coated containment floor and walls beside steel storage tanks

Corrosion

Moisture, oxygen and salts attack steel and the reinforcing inside concrete.

Corrosion
Gloved hand striking a coated sample block with a hammer

Impact

Dropped loads, debris and equipment crack rigid finishes and expose what is underneath.

Impact
Applicator spraying a light gray coating across the floor of a lined tank

Chemicals

Fuels, acids, caustics and solvents can soften, swell or eat through the wrong material.

Chemicals
Black coated flood wall running along a wide riverbank

Water

Standing water, rain, flooding and immersion find every crack and joint.

Water
Concrete block structure coated in a dark blue protective layer on an open site

Blast and fragments

Blast pressure and flying fragments break walls apart and turn them into hazards.

Blast and fragments

See every threat in detail

From the journal

All articles

FAQ

Quick answers

All questions

What is a protective coating?

A coating applied mainly to stop damage rather than to decorate. It keeps abrasion, corrosion, impact, chemicals or water away from the surface underneath. See the threats.

Why polyurea?

It sets within seconds into thick, elastic, seamless films, so it suits jobs that need protection fast and on complex shapes. Read polyurea for protection.

How thick should it be?

The product data sheet and the specification set the range for each use. Thickness is checked during and after application.

Does it work outdoors?

Yes, but aromatic polyurea darkens in sunlight. A colour stable aliphatic topcoat is common where looks matter.

What surfaces can it go on?

Concrete, steel, masonry, wood, geotextile and some existing coatings, each with its own preparation. See substrates.

Next step

Name the threats, then build the checklist.