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Technical Data Sheet - Last Patch™ Flowing
Product Name
Last Patch™ Flowing
Manufacturer
Bonstone Materials Corporation
Product Description
A kit packaged exterior grade stone repair compound. Designed for addition of stone aggregate, overfill of patch area, and grinding flush. This product exhibits far superior color stability and gloss retention when compared to epoxy and polyester patching materials.
Options:
- Cure - Fast 20 min@ 70F
- Color - Std. Clear Custom As required
- Viscosity - Custom Flowing etc.
Applications
- Overfill and grind patching with stone aggregate
- Travertine fill with or without aggregate
- Dutchman installation (Replacement of stone pieces)
- Patching granite & marble
Limitations
Use on dry stone. Use on oil, grease, and coatings free stone. Store
product @ room temperature and limit humidity exposure. Do not store
at or near freezing temperatures.
Technical Data
| Mixed Properties | Values | Test Methods |
| Mix ratio | 2oz. Kit packaged (Use entire kit) Plastic containers 1:1 mix ratio (Pint & Quart cases) |
|
| Mixed Viscosity at 75°F (standard product) | Flowing (holds peak) | |
| Pot Life at 75°F (ready to grind) |
2 minutes | Std. high speed version Initial set time at 75°F |
| 15-20 minutes | Std version | |
| 2 hours | ||
| UV TESTING: | QUV with SOLAR EYE (Cycles; 4 hours condense @ 50°C, followed by 8 hours UV-A-340/ 0.8 intensity/ 60°C). Total of 500 hours Results: * No change in yellow index * E= 0.78 |
| Cured Properties | Values | Test Methods |
| Cohesive Tensile Strength: | 382 psi | ASTM D-638 |
| Cohesive Tensile Moduli: | 1796 psi | ASTM D-638 |
| Cohesive Tensile Elongation (at break): | 20.7% | ASTM D-638 |
| Compressive Strength: | 6876 psi | ASTM D-695 |
| Compressive Moduli: | 42022 psi | ASTM D-695 |
| Adhesive (on Academy Black Granite) Tensile Shear | 792 psi | ASTM D-905 |
Installation
General Instructions
(See separate dutchman and travertine filling instructions for more
specific instructions. CSI format specifications are available)
Surface
Preparation and Use
Use gloves, wear eye protection, and avoid skin contact. When grinding
cured product wear a dust mask. Substrate to be patched must be completely
dry and dust free. Mix and apply the entire kit at one time. Avoid stressing
the joint before complete cure of product. Mask areas which must be kept
free of product. Clean uncured product from tools with toluol or xylol.
(Use caution, these solvents are flammable. Ensure local ventilation.)
Remove cured product mechanically.
Mixing Instructions
See back of page for graphical and written instructions for kit use.
Last Patch™-Gel has a mix ratio 1:1 by volume
Product can then be tinted (do not exceed 5% by weight polyester colorant addition.) Product can then have stone aggregate added.
Apply with trowel or other implement into and over the area to be repaired.
Temperature Dependency
The adhesive, substrate, aggregate, and environment’s temperature
will affect the working properties of the material. With all items at
700F (21.1 0C) the standard product will set up in approximately 15-20
minutes. Grinding may be performed in several hours. Full cure 48 hours
Coverage
2 oz. kits contain about 4 cubic inches of product. Call Bonstone for
coverage of your project.
- Stone aggregate is often approximately 50% of a patch volume, so double the volume of the cartridge for a rough estimate of coverage.
Availability
Packaging and Storage
The Last Patch™ is available in kit form & quarts. Standard
kits are packaged in 2 fluid ounces, and quarts. Standard kits and quarts
are clear, flowing product. Special kits may be ordered. Modification
of standard kits for color matching requires at least 2 weeks from time
of order. Special size or viscosity products will vary with prior experience
and normally take 6 to 8 weeks for production and delivery.
Shelf life is printed on the product label. It is generally 6 months to one year from date of packaging.
Store at room temperature (well above freezing) and at a relative humidity below 75%.
Warranty
This product’s warranty is limited to replacement of defective material and freight charges to destination only. Bonstone Materials Corporation is not responsible for consequential damages.
Maintenance
This product is designed for application in areas inaccessible to maintenance procedures. Some powerful etching compounds, especially those containing hydrofluoric acid, may degrade the material.
Technical Service
Lab Service
- Spectrophotometric color matching is available.
- Sample patches can be made on stone forwarded to lab.
Specification Service
- Specifications on file
- Development of proposed specifications for special projects.
This information is furnished without warranty, representation, inducement, or license of any kind, except that is is accurate to the best of Bonstone Material Corporation's (BMC) knowledge or obtained from sources believed by BMC to be accurate, and BMC does not assume any legal responsibility for use of reliance upon same. User must determine if the product, process, or information described is suitable to the intended application. Before using any chemical, read its label and Material Safety Data Sheet.