SureStamp™ is a stampable cement-based topping for beautifying both interior and exterior concrete surfaces. For existing plain concrete, it creates textures that resemble a whole array of designs: tile, cut stone, slate, boardwalk, brick, cobblestone, etc. with traditional concrete stamping tools. Costly tear-out and replacement of existing concrete is eliminated.
SureStamp offers restoration, repair, resurfacing, architectural accenting, and surface protection of existing concrete.
SureBond (see TDS) a cement-based bonding agent, must be used in combination with SureStamp to achieve the ultimate adhesion essential in a stampable overlay. It is seasonally user-friendly, available in Standard and “ST” for hot weather.
Description
The principles for surface preparation for SureStamp are aligned with other cement-based overlays placed on concrete and remain constant; the substrate must be:
- Clean: The surface must be free of dust, dirt, oil, grease, paints, glues, sealers, curing agents, efflorescence, chemical contaminants, rust, algae, mildew and other foreign matter that may serve as a bond breaker.
- Cured: Any concrete must be sufficiently cured to have sufficient hydration, approximately 7 - 14 days depending on temperatures and humidity.
- Sound: No system should be placed upon concrete or an existing cement-based overlay that is flaking, spalling, or has hibernating spalling.
- Profiled: Proper profile should follow the standard established by the International Concrete Repair Institute (ICRI) Technical Guideline no. 03732 for Concrete Surface Profile (CSP). The established profile is categorized as CSP-1 through CSP-4.
The most common means to properly profile many concrete slabs (especially exterior slabs) is through the use a pressure washer equipped with a turbo-tip and the use of SCR (see SCR TDS). Some concrete slabs that are hard troweled or that are not sound may require more aggressive profiling through diamond grinding or shot blasting.
Customarily profiling is not required for application over another cement- based overlay.
Surface Preparation
- Air and substrate surface temperatures shall remain between 50°F (10°C) and 90°F (32°C) during and within 48 hours of placement.
- No precipitation should occur during or within 48 hours of placement. If SureStamp becomes wet prior to sealing, pigments will fade excessively and whiting will occur.
- Avoid high heat and / or windy conditions. Attempt to minimize application during such harsh conditions. Keep materials shaded prior to mixing, running water until cool, and setting up temporary walls for wind blocks.
- Because SureStamp is placed so much thicker than many other cement-based overlays (¼” - 3/8” [6.35 – 9.5 mm]), interior applications and cool, shaded areas will take significantly longer to dry and cure. Even in summer months, the winter mix design should be considered for these applications.
- This product (depending on weather conditions) should achieve initial set within 6 – 8 hours. Like concrete full cure is reached at 28 days.
- Sealer selection for a finished SureStamp project will require different cure times:
HS, Super, or ColorTec Series products may apply as soon as overnight. See specific acrylic sealer TDS.
b. DK (Dura-Kote) or ColorTec coatings may require longer cure times, perhaps 24 hours or more. See specific coating TDS.
Patching
Upon surface preparation, some areas may require patching prior to application of SureStamp. Flash Patch or Deep Patchcrete to a sound state. Refer to Flash Patch or Deep Patch TDS.
Crack Treatment / Construction Joints
Cracks may require treatment: Refer to SCT-22 Crack and Spall Treatment and SCT-EP Epoxy Crack Treatment TDS to evaluate crack as static or structural to set expectation of treatment.
Never bridge SureStamp across any joint in concrete. Construction Joints in concrete have sufficient movement to “telegraph” through SureStamp applications. Large expansive slabs should have planned appropriate flexible caulks to allow for this movement.
Mixing and Handling
- Add water, approximately 3.5 qt. (3.3 liter) to a 5 gal. (18.9 liter)
- Add 1 - SC TruColor if desired.
- Mix with a handheld concrete mixer, such as an Eibenstock model #EHR 20R or a ½” (12.7 mm) 450 – 600 rpm drill equipped with a cage mixing blade for a minimum of 15 seconds.
- Slowly introduce SureStamp into the pail with mixer running.
- Scrape side of pail with a margin trowel to ensure all dry product is incorporated into the wet mix.
- Continue to mix for a minimum of 1 minute after all ingredients are combined to achieve a lump-free consistency.
- Additional water may be added up to 4 quarts (3.8 liters)
total for 50 pound (22.7kg)
Note: a mortar mixer for larger jobs to mix multiple bags is appropriate. Maintain same quantities: 1 bag + 1 Color Pack + 3 ½ - 4 qts. (3.5 – 3.8 liters) water.
Bond Coat
- The surface should be saturated, surface dry (SSD or damp, no puddles).
- Pour a generous ribbon of SureBond and spread with squeegee over an area that corresponds to the area to be covered by SureStamp that was mixed.
Stamp Coat
- While the SureBond is still wet, pour the mixed SureStamp onto surface.
- Gauge rake the product to the appropriate height for stamp selected ¼” - 3/8” (6.35 – 9.5 mm).
- Smooth the surface of product with a metal squeegee, pool trowel, fresno, or “magic trowel.” If surface is excessively “sticky,” Surface Delay (see TDS) misted ahead of the tool is appropriate.
Stamping
- Allow product to begin to dry, yet remain plastic. The surface will lose its wet sheen and yield to the touch with very little if any sticking to finger.
- Spray SureRelase Liquid (see TDS) from a solvent resistant pump-up sprayer onto stamping tools and onto surface to be stamped.
- Progressively place stamps as product achieves appropriate dryness as described above and following the customary pattern of concrete stamping.
Clean-Up
- Allow stamped area to set up sufficiently to bear very light, foot traffic. This time period may vary widely due to site conditions.
- Cut away and detail double lines as needed.
- Remove any latent release by washing the stamped surface with SCR diluted 4:1 (4 parts water to 1 part SCR). Use a soft brush and rinse frequently with hose spray nozzle. A mop and mop bucket may be used for interior sites. Refer to SCR TDS.
Secondary coloring
Depending upon the application selected, secondary coloring will provide aesthetic appeal to a project. There are several products available:
• Eco-Stain - 30 water base stain colors. Refer to TDS.
• Eco-Accent – 10 dry antiquing colors. Refer to TDS.
(Note: Before secondary coloring, the Stamp Coat must set sufficiently to bear the foot traffic of the applicator and freshly cleaned areas must be healed and dry.)
Sealing
To complete a SureStamp project sealing is required. Exterior jobs will require the sealing with an acrylic sealer, due to its vapor permeability. Excellent choices for exterior sealer include:
- HS 200LV - 20% solids, 400 g/L solvent
- HS 300LV - 30% solids, 400 g/L solvent
- Super WB – 30% solids water based
Other sealer choices for floors with enhanced durability properties include:
- DK 400WB (Water Based Polyurethane) – gloss finish
- DK 400WB (Water Based Polyurethane) – satin finish
- XS-327 (Water Based Hybrid Polyurethane)
Before SureStamp dries; spills and tools can be cleaned up with water.
Cleanup
Due to condition specific sites, always prepare an adequate number of test areas. Wear protection system and aesthetic suitability for products’ intended use should be included. On site sample approval is especially critical on substantial, heavy traffic situation or custom coloration.
Mixing Ratio
3.5 – 4 qt. (3.3 – 3.8 liter) water to 1 – 50 pound (22.7 kg) bag of SureStamp
(optional) .5 pound (227 g) SC TruColor – 30 standard colors (see SC TruColor TDS)
Coverage
1 - 50 lb. (22.7 kg) bag of SureStamp
15-18 ft² @ 3/8” (1.4 – 1.7 m² @ 9.5mm)
20-24 ft² @ ¼” (1.9 – 2.2 m² @ 6.35mm)
Density
132 pounds/ft³ (2114 kg/m³)
Compressive Strength ASTM C-109
28 day 4350 PSI (29992 kPa)
Flexural Strength ASTM C-348
28 day 945 PSI (6515 kPa)
Tensile Strength ASTM C-190
28 day 440 PSI (3033 kPa)
Abrasion Resistance ASTM D-4060
28 days <.55%
T-Bar Adhesion (DUROCK)
28 day 190.3 PSI (1312 kPa)
Shear Strength ANSI 118.4
28 day 280 PSI (1930 kPa)
Shelf Life
Under normal conditions: when kept dry and moisture free, out of direct sunlight, the shelf life of an unopened bag is (12) months from the date of purchase. Storage must be under roof and off the floor. Rotate inventory to maintain product that is within limits.
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