Brick Is Different. Your Primer Has to Be Too.

Standard latex paints and many “exterior-grade” primers treat all surfaces roughly the same — they sit on top of the substrate and form a film. That approach works reasonably well on wood and vinyl. On brick, it’s a setup for failure.

Brick and mortar are porous by nature. They absorb moisture, they release it, they expand slightly with heat and contract in the cold. A coating that can’t move with the surface — and can’t breathe with it — will eventually lose its bond. Water gets underneath, freeze-thaw cycles do their damage, and what looked good in spring is peeling by fall.

The challenge of unfinished and raw brick

Unfinished brick compounds this challenge further. Without any prior coating history, the surface is completely raw — highly absorbent, with mortar joints absorbing moisture at a very different rate than the brick faces themselves. Applying a ceramic topcoat directly to raw brick without a purpose-engineered primer would be like applying paint to bare concrete without sealing it first.

The results — eventually — speak for themselves.

Why standard primers aren’t enough

• Standard primers form a surface film rather than penetrating and bonding with the substrate
• They cannot equalize the different absorption rates of brick faces versus mortar joints
• They lack the flexibility required to move with brick through seasonal thermal expansion and contraction
• Most do not create a breathable waterproof membrane — trapping moisture behind the coating rather than allowing vapor to escape
• They are not formulated to chemically bond with ceramic elastomeric topcoats

Meet the APS: Rhino Shield’s Adhesive Primer Sealer

The cornerstone of Rhino Shield’s approach to brick is the Adhesive Primer Sealer — known as the APS. This isn’t a product adapted from a general-purpose primer. It was formulated specifically to work in concert with Rhino Shield’s ceramic elastomeric finish coats and has been refined over more than 20 years of field application.

Rather than forming a film on top of the brick, the APS penetrates into the substrate and becomes part of it. As it dries, it forms a sticky, water-tight membrane that locks into the pores and structure of the brick itself.

What the APS does that other primers don’t

• Penetrates and bonds at the substrate level — rather than sitting on top of the surface, the APS becomes part of the brick, creating a mechanical and chemical bond that dramatically outlasts surface-film primers
• Seals hairline cracks and micro-fissures in mortar and brick faces before the finish coat is ever applied — eliminating a primary entry point for moisture
• Creates a breathable waterproof barrier — water cannot penetrate inward, but vapor pressure from within the wall can still escape outward. This is the critical distinction between a coating that protects and one that traps
• Equalizes absorption rates across brick faces and mortar joints, giving the topcoat a consistent bonding surface rather than two very different substrates competing for coverage
• Solves stubborn peeling problems on previously-painted brick by reforming adhesion at the substrate level
• Works in conjunction with the DFC topcoat — the APS is engineered as part of an integrated system, not a standalone product

Over 20 years of proven performance

Rhino Shield’s APS has been a cornerstone of their system for over two decades. It is, as the manufacturer describes it, “totally unique and unlike other primers on the market” — and the performance data from completed projects across Missouri backs that up. Homes coated with the full Rhino Shield system, starting with APS, carry a 25-year warranty. That warranty is only possible because the primer does its job.

The Rhino Shield Application Process: Where the Primer Fits

At Rhino Shield of Missouri, every project follows a comprehensive ten-step application process. The primer isn’t step one — it’s the payoff of everything that comes before it, and the foundation of everything that follows. Here’s how it works on a brick exterior:

Step 1 — Initial inspection and project walkthrough

We assess the brick’s full condition before a drop of product is applied. This includes identifying efflorescence, spalling, previous coating failures, active moisture issues, and mortar deterioration — all of which affect how we prepare the surface and which primer approach is appropriate.

Step 2 — Thorough pressure washing

A critical surface preparation step. Brick must be completely clean before primer is applied. Dirt, biological growth, old chalky paint, and loose material are all fully removed. Contamination under a primer means contamination under your entire coating system.

Step 3 — Surface repair

Cracked mortar joints are tuckpointed. Spalled brick areas are addressed. Surface defects are remediated. The APS will seal micro-fissures, but macro cracks require physical repair first — and skipping this step undermines everything that follows.

Step 4 — APS primer application

The Adhesive Primer Sealer is applied to the fully prepared brick surface. It penetrates the substrate, bonds at the molecular level, and creates the waterproof, breathable foundation that makes the entire system perform for decades. This is the step you can watch in the video above — and seeing it applied by professionals makes clear why technique and product quality both matter.

Step 5 — Ceramic elastomeric topcoat application

Rhino Shield’s signature Durable Finish Coat (DFC) ceramic topcoat is applied over the fully cured primer — bonding to the APS layer and creating a unified, flexible, ceramic-reinforced exterior shell across the entire brick surface.

Steps 6–10 — Quality verification, trim work, and final inspection

Every project concludes with rigorous quality review, coverage verification, color consistency checks, and a full site cleanup — before we sign off and issue the 25-year warranty.

Why This Matters for Your Brick Home

If you own a brick home in Missouri — whether it’s a classic mid-century ranch, a newer construction with exposed brick accents, or a farmhouse with decades of weather history — the question isn’t whether your brick exterior needs protection. It does. The question is whether the coating system you choose will still be performing in 25 years, or whether you’ll be repainting in five.

The difference comes down to the primer. A system that starts with a purpose-engineered, penetrating, breathable adhesive primer sealer — applied by trained professionals following a rigorous multi-step process — performs in an entirely different category than a standard exterior paint job, no matter how premium the topcoat brand.

What sets Rhino Shield of Missouri apart on brick

• Purpose-engineered APS primer specifically formulated to bond with ceramic elastomeric topcoats
• Over 20 years of refined primer technology, proven on Missouri brick in all seasons
• A ten-step application process that treats surface preparation as seriously as the coating itself
• Certified, trained dealers who understand the specific demands of brick and unfinished brick surfaces
• Full system warranty — 25 years — only possible because every layer is designed to work together

Rhino Shield of Missouri’s brick coating system is built around this philosophy. Every brick project we do — raw unfinished brick, previously-painted brick, commercial brick facades — begins with the APS. And every project we complete is backed by a 25-year warranty founded on that base.

Watching the primer go on in the video above, you’re seeing more than a product being applied to a wall. You’re watching the beginning of a 25-year commitment — the moment where the science of surface preparation meets the craft of professional application, and where the lasting beauty of your brick exterior is actually decided.

Learn More and Get Started

Ready to protect your brick the right way? Explore these resources:

• Brick Exterior Paint Coatings — Rhino Shield of Missouri — full details on our brick coating system, surfaces we serve, and what to expect
• The Rhino Shield Application Process — our complete ten-step system explained
• Rhino Shield Primers — the full primer product lineup from Rhino Shield
• Adhesive Primer Sealer (APS) — detailed product information on the cornerstone of our brick system
• Request a Free Estimate — get a no-obligation quote for your Missouri brick home