Rainguard Stucco Sealer Protects Walls Against Wind Driven Rain

APPLICATION INSTRUCTIONS

WORKING WITH CONCENTRATES

FOLLOW THESE SIMPLE APPLICATION STEPS
Clean and Prep:
Before pressure washing apply and brush out stains using Cleaner/Prep manufactured by Rainguard and available here on our website. Ensure the surface is clean and “bone dry”, thus allowing the sealer to absorb into the surface.

Application:
For a proper application, use a hand pumped garden sprayer. Apply 1 (one) heavy saturation coat to ensure the product can penetrate deep into the surface, sealing the pores or capillaries. Once the 1st coat is dry to the touch apply the recommended 2nd saturation coat to ensure best results. Once the 2nd coat is completely dry you can now put any decor, furniture etc. back on the treated surface. IMPORTANT: Avoid letting any water to come in contact with your newly sealed surface for 24 hours. After full cure time is achieved (approximately 4-5 days) you can expect the full beading effect.

Wait to test water repellency after the full chemical cure period. To conduct a test, simply drip some water in a few places where you have sealed the surface, if the drips make the surface darken, this is an indication that it is still absorbing, meaning you need to apply another coating. (more common with older surfaces)

Vertical Surfaces:
Allow product to drip heavily before moving onto the next spot. Heavily saturate the surface maintaining at least a 6-inch drip or run down.

Horizontal Surfaces:
Apply the product until it starts to pool up slightly. You will know enough was applied in any given spot when the product starts to pool (puddle) up with a milky-white color. The puddling will dissipate slowly into the pores so there is no need to back roll or brush them out.

Clean-Up:
Clean-up is a breeze thanks to our water based formula. Simply rinse out equipment with fresh water after application until it runs clear. Any undesired over-spray on windows or glass can be immediately wiped off. If the product has already dried it can be cleaned off quickly with a rag, warm water, and a mild soap.

PRECAUTIONS & LIMITATIONS
1. All surfaces to be coated should be clean of any dirt and grime, efflorescence, lime run, form oils and release agents, grease, mud, excess mortar, and mold and mildew, etc.
2. All cracks should be pointed or caulked. All voids, bee holes, masonry surface defects and openings such as conduits, pipes, drains, door frames, vents, air conditioner openings, electrical openings, control joints, or any dissimilar materials should be repaired using urethane or other approved patching.

STORAGE
Store materials in a well-protected area between 45° and 90°F. Avoid freezing temperatures, direct sunlight, and moisture. Keep away from heat sources.

What is Premium Grade Stucco Sealer & Water Repellent?

Premium Grade Stucco Sealer is a clear, penetrating silane siloxane water repellent designed specifically for stucco and masonry surfaces. It protects exterior walls from moisture damage while maintaining the natural look of the surface.

How does this stucco sealer work?

It penetrates deep into porous stucco and forms a hydrophobic barrier inside the surface, causing water to bead and shed off instead of absorbing into the wall. This helps reduce long-term moisture damage, cracking, and staining.

Does Premium Stucco Sealer make stucco waterproof?

No—stucco is not meant to be fully waterproof. Instead, this product makes it highly water-repellent while still allowing vapor to escape, which is critical to prevent trapped moisture inside walls.

Can it stop wind-driven rain?

Yes. This sealer is designed to help resist wind-driven rain penetration, reducing water intrusion during storms and harsh weather conditions.

Will it change the look or color of stucco?

No. It is a clear, non-film-forming sealer that does not change color, sheen, or texture. It is designed to preserve the natural appearance of stucco.

What surfaces can this be used on?

It is ideal for:

• Stucco walls
• Masonry surfaces
• Exterior porous cement-based finishes
• Vertical wall applications

Can it be used on new stucco?

Yes. It can typically be applied once stucco has properly cured and dried, making it suitable for both new construction and restoration projects.

Is it resistant to mold and mildew?

Yes. By reducing moisture absorption, it helps limit conditions that allow mold, mildew, and algae growth on exterior surfaces.

What is the coverage rate?

Coverage varies based on surface porosity, but typical rates are:

• Stucco: ~100–150 sq ft per gallon (ready-to-use range)

For help determining quantity amounts for YOUR project reach out to us at 630-675-4509 or sales@exteriorcoatings.com.

How is it applied?

It is typically applied using:

• Low-pressure pump sprayer
• Airless sprayer

Most surfaces require 2 saturation coats for optimal penetration and performance. For additional application tips reach out to us today at 630-675-4509 or sales@exteriorcoatings.com.

What temperature can it be applied in?

It can generally be applied in temperatures as low as 40°F (4°C) and up to about 90°F, depending on surface conditions.

Does it help prevent cracking or salt damage?

Yes. By reducing water absorption, it helps protect stucco from:

• Freeze/thaw cracking
• Efflorescence (white salt deposits)
• Salt and moisture deterioration over time

Is this product environmentally friendly?

Yes. It is a low-VOC, eco-friendly, water-based formula that is safe for residential and commercial exterior use when applied properly.

What makes silane siloxane different from regular sealers?

Silane siloxane sealers:

• Penetrate below the surface instead of forming a film
• Allow walls to breathe
• Offer long-term water repellency
• Resist UV breakdown and weathering

Why choose Premium Grade Stucco Sealer over paint or coatings?

Unlike paint or surface coatings, this product:

• Does not peel or flake
• Preserves natural stucco appearance
• Protects from inside the surface outward
• Maintains breathability (critical for stucco walls)