How To: Vertical Stamping

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Materials required: Flexy-Bo Primer & Bonder, Tru Pac-X, Integral color, 14″ pool trowel, Liquid Releasing agent, RockMolds.com stamps, Tuck Point Trowel, TruTint water base stains, TruBlock sealant.

1. The existing substrate is a set of concrete block retaining walls. Vertical stamping is a perfect application to veneer these walls with a natural stone look.

Vertical-Stamping-Existing-Substrate

2. First Flexy-Bo Primer & Bonder is rolled onto the concrete wall. Allow to tack up for 30 minutes.

Vertical-Stamping-Flexy-Bo-Primer-Bonder

3. Apply a thin 1/8″ thick scratch coat of S-Type mortar with a pool trowel, and scarify the surface.

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4. After the scratch coat has been allowed to dry, saturate the surface thoroughly with a garden hose, and apply a ½”- 2″ thick texture coat of Tru Pac X with a 14″ pool trowel. Undulate the depth so that it has varying thickness.

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5. Immediately visualize the stones, and scratch in rough outlines. These will be your stamping guidelines. Tip #1: The thicker the stones, the deeper the joints, and the deeper the shadows. This gives the stones depth and realism.

Vertical-Stamping-visualize-the-stones

6. A liquid release is then applied to the troweled out texture coat, and to the RockMolds.com stamps. This allows an impression without sticking. Stamp a distinctive texture between the stamping guidelines.

Tip #2: It is important to immediately stamp after a batch of Tru Pac X has been applied, as the detailed texture will be captured with a softer surface.

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7. Continue the application of Tru Pac X, batch by batch, and stamping out immediately behind. Use a variety of RockMolds.com stamps to avoid repetition of textures.

We use LS101F, LS102F, LS103F, LS104F, LS105F for the majority of our vertical stamping. Tip #3: Rotate your stamps when stamping so the textures spin 360 degrees from stone to stone.

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8. After the vertical stamp mix has sufficiently firmed up, usually within 4-6 hours, the joints can be accented by carving out. A tuck point trowel works great.

Tip #4: Keep the joints tight between the stones, to create a shadow and depth.

Tip#5: A chip brush dipped in water may be used at this time as well to clean up the stones.

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9. Let your wall cure 24 hours minimum. Hose off any loose debris.

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10. Color the stones with Tru Tint water base stains. Start with lighter colors, and layer in the darker colors until a certain look is obtained. You can always go darker!

Tip #6. Use multiple quart size spray bottles to apply different colors of stain, mixing the colors wet on wet so they blend together. Use a concrete sponge to blot the surface for any runs.

Vertical-Stamping-Tru-Tint-water-base-stains

11. Seal the stones with Tru Block water base sealant. This will give the most natural appearance to the stones, without a sheen.

Tip #7: Seal every 2 years to refresh the color and protect your investment!

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