U.S. General Services Administration
Technical Procedures Disclaimer
Prior to inclusion in GSA’s library of procedures, documents are reviewed by one or more qualified preservation specialists for general consistency with the Secretary of Interior Standards for rehabilitating historic buildings as understood at the time the procedure is added to the library. All specifications require project-specific editing and professional judgement regarding the applicability of a procedure to a particular building, project or location. References to products and suppliers are to serve as a general guideline and do not constitute a federal endorsement or determination that a product or method is the best or most current alternative, remains available, or is compliant with current environmental regulations and safety standards. The library of procedures is intended to serve as a resource, not a substitute, for specification development by a qualified preservation professional.
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We’ve reviewed these procedures for general consistency with federal standards for rehabilitating historic buildings and provide them only as a reference. Specifications should only be applied under the guidance of a qualified preservation professional who can assess the applicability of a procedure to a particular building, project or location. References to products and suppliers serve as general guidelines and do not constitute a federal endorsement nor a determination that a product or method is the best alternative or compliant with current environmental regulations and safety standards.
PART 1—GENERAL
1.01 SUMMARY
- This procedure includes guidance on patching holes in pigmented structural glass partitions using a polyester resin.
- See also 08810-01-R, 08810-01-S and 08810-02-R for additional guidance on the preservation of pigmented structural glass panels.
- See 01100-07-S for general project guidelines to be reviewed along with this procedure. These guidelines cover the following sections:
- Safety Precautions
- Historic Structures Precautions
- Submittals
- Quality Assurance
- Delivery, Storage and Handling
- Project/Site Conditions
- Sequencing and Scheduling
- General Protection (Surface and Surrounding)
These guidelines should be reviewed prior to performing this procedure and should be followed, when applicable, along with recommendations from the Regional Historic Preservation Officer (RHPO).
PART 2—PRODUCTS
2.01 MANUFACTURERS/SUPPLIERS
Do internal search for suppliers of the products.
2.02 MATERIALS
- Patching Material: Polyester resin adhesive which can be tinted to match the surrounding glass, such as “Akemi Transparent Knife Grade” (Akemi Plastics, Inc.), or approved equal.
- Pigment: Coloring agent compatible with adhesive and patching material and recommended by adhesive manufacturer, such as “Akemi Coloring Paste Iron Oxide” (Akemi Plastics, Inc.), or approved equal.
- Polish: Fluid for polishing patching areas recommended by adhesive manufacturer, such as “Akemi Polishing Fluid” (Akemi Plastics, Inc.), or approved equal.
PART 3—EXECUTION
3.01 ERECTION, INSTALLATION, APPLICATION
- Fill all holes and cracks larger than 1/8” with polyester resin adhesive.
- Match the dry color of the filler to the color of the immediate surrounding clean material, using the manufacturer’s recommended materials.
- Smooth the surface of the patch level with the surrounding material. Do not allow filler to extend over the surface of the surrounding material. Remove all excess immediately.
- Polish: After all repair, replacement, and cleaning, polish with 400 grit wet or dry sandpaper and buff with polish, following manufacturer’s instructions.