Unibind Crystal Flex Clear Thermal Binding Covers
- Brand
- Peleman (Unibind)
- SKU:
- 17280LS40BA
- Availability:
- In Stock
- Product Type:
- Flex Covers
- Layout:
- Portrait (Letter Size)
- Max Sheet Capacity (20lb):
- 340
- Material:
- Clear Acetate
Unibind Crystal Flex Covers are premium clear thermal binding covers designed for professional document presentation with permanent SteelResin™ binding. Each cover features one crystal-clear front cover and one matte back cover, giving your document a clean finished look while still showcasing the title page.
Crystal Flex Covers are ideal for reports, proposals, manuals, presentations, menus, catalogs, and other client-facing documents. They create a polished finished piece without punching, comb binding, coil binding, stapling, or mechanical assembly. Just insert your pages, bind, and let the adhesive do the work.
Quick Highlights
- Clear Front Cover: Displays your title page, logo page, or cover sheet cleanly.
- Matte Back Cover: Adds durability and gives the finished document a professional appearance.
- SteelResin™ Binding: Creates a permanent thermal bind without punching or loose parts.
- Multiple Spine Sizes: Available for documents from approximately 15 to 340 sheets.
- Unibind Compatible: Works with Peleman and Unibind thermal binding systems.
- Fast Binding Process: Insert pages, heat the spine, cool, and finish.
- Professional Presentation: A cleaner alternative to comb, coil, staple, or report covers.
- Title Page Visibility: The clear front cover lets each document look custom without custom printing.
Crystal Flex Spine Size & Sheet Capacity
Choose the spine size based on your sheet count and paper type. Standard 20lb. paper allows a higher sheet count, while 32lb. presentation paper is thicker and reduces capacity.
Capacities are general estimates. Legacy sizes reflect earlier Crystal Flex naming conventions such as XS, S, M, L, XL, and XXL.
| Spine Size | Legacy Size | 20lb. Paper | 32lb. Paper | Qty |
|---|---|---|---|---|
| 03 mm / 1/8" | XS | 20 sheets | 15 sheets | 110/Box |
| 05 mm / 3/16" | S | 40 sheets | 30 sheets | 96/Box |
| 07 mm / 5/16" | 60 sheets | 40 sheets | 88/Box | |
| 09 mm / 3/8" | M | 80 sheets | 65 sheets | 72/Box |
| 12 mm / 1/2" | 100 sheets | 80 sheets | 66/Box | |
| 15 mm / 5/8" | L | 120 sheets | 90 sheets | 60/Box |
| 18 mm / 3/4" | 160 sheets | 110 sheets | 44/Box | |
| 24 mm / 1" | XL | 220 sheets | 145 sheets | 48/Box |
| 36 mm / 1-1/2" | XXL | 340 sheets | 230 sheets | 24/Box |
Using heavier paper, tabs, inserts, dividers, laminated sheets, or specialty stock? Size up one step when you are close to the maximum capacity.
Cover Design & Binding Features
Crystal-Clear Front
The clear front cover lets the first page become the cover of the finished document.
This works well for proposals, title pages, branded covers, menus, catalogs, and presentation books.
Matte Back Cover
The matte back cover gives the document a clean, finished feel and adds protection during handling.
It is a simple way to make everyday printed pages look more polished and presentation-ready.
One-Piece Cover
The clear front, spine, and matte back are attached as one cover.
A score mark helps the cover open cleanly while keeping the document easy to assemble and bind.
How to Use Crystal Flex Covers
1. Choose the Spine Size
Select the correct spine based on the number of sheets and the paper thickness.
2. Insert Your Pages
Place your printed pages evenly into the spine with the title page facing the clear front cover.
3. Bind the Document
Place the document into your Unibind thermal binding machine and allow the spine to heat.
4. Cool & Finish
Let the bound document cool fully before handling for the strongest finished bind.
Optional Upgrade
vPaper Lay-Flat Paper
For documents that need to open more naturally and lay flatter on a desk or table, use vPaper 32lb. lay-flat paper.
Each sheet includes a built-in hinge, making it especially useful for manuals, catalogs, training materials, menus, and presentation books.
Custom Branding
Foil stamping and custom branding options may be available for larger presentation projects.
Need help with a branded document presentation project? Contact us for assistance.
Compatible Machines
Crystal Flex Covers work with the current Unibind thermal binding machine lineup and other compatible Unibind/Peleman systems.
For best results, insert pages evenly, heat the spine on the binding machine, and allow the finished document to cool before handling.
Best Uses for Crystal Flex Covers
Business Presentations
Proposals, sales presentations, financial reports, real estate packets, and client-facing documents.
Manuals & Reference Materials
Training manuals, policy books, instruction guides, catalogs, and office reference documents.
Menus & Short-Run Books
Restaurant menus, hospitality documents, event books, product guides, and polished printed materials.
Crystal Flex Covers are a strong choice when you want the title page visible and the finished document to look cleaner, more permanent, and more professional than a standard report cover.
More About Crystal Flex Covers
Crystal Flex Covers are designed for professional thermal binding systems that create finished documents without punching holes through the pages. The steel spine and thermal resin bond the document edge to create a clean, secure spine.
The clear front cover makes each document feel customized because the printed title page becomes the visible front cover. This is especially useful when each report, proposal, manual, or menu needs a different title or customer name.
These covers are a practical fit for offices, schools, print shops, training departments, restaurants, real estate teams, and businesses that want professional bound documents produced in-house.
Manufactured by Peleman Industries
Peleman Industries has specialized in professional document presentation since 1939. Unibind systems and covers are engineered for reliable thermal binding, polished presentation quality, and repeatable in-house production.
Frequently Asked Questions
Are Crystal Flex Covers compatible with my Unibind machine?
Yes. Crystal Flex Covers work with UniBinder 60, UniBinder 120, UniBinder 8.1, UniBinder 8.2, and other compatible Unibind thermal binding systems.
How do I choose the right spine size?
Count your pages, note your paper type, and choose the closest capacity from the chart. If you are using heavier paper, tabs, inserts, or dividers, size up one step when you are close to the limit.
Is this cover all one piece?
Yes. The clear front cover, spine, and matte back cover are attached as one piece, making Crystal Flex Covers simple to assemble and bind.
Are Crystal Flex Covers reusable?
No. These covers are intended for permanent thermal binding. Small page adjustments can sometimes be made by reheating, but they are not designed as reusable covers.
Do the covers resist moisture?
Yes. The plastic cover offers light protection from handling and minor spills, though the finished document should not be considered waterproof.
Can I use vPaper with Crystal Flex Covers?
Yes. vPaper can improve lay-flat performance and gives printed pages a heavier presentation feel. Because it is thicker than standard copy paper, it reduces the number of sheets that fit in each spine size.
Can I mix paper weights?
Yes, as long as the total document thickness stays within the cover capacity. If the document is close to the limit, choose the next larger spine size.
Can these covers be customized?
Custom branding options may be available depending on the project. Contact us if you need foil stamping, custom presentation covers, or help with a larger branded order.
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9 Reviews Hide Reviews Show Reviews
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Crystal Flex Unibind Covers
These are very excellent covers for the types of real estate presentation binders I make. My only wish is that you had a sampler package where we could purchase several different sizes in one package. Shipping and customer service was excellent and I will be a repeat customer!
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Fast Delivery/Product Availability
I was happy to find the product I needed and the speed of ordering processing and delivery was quicker than expected.
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UniBind 3mm Flex Covers
Super speedy delivery. Excellent product. Happy customer!
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Prompt service and delivery
Got what I needed when I needed it. Easy order process.
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Great Product, Great Service
I am so pleased with the Unibind product line that I recreated my entire promotional presentation around it.
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Unibind Flex Covers
Excellent customer service, great product and FAST shipping!!
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Uni-Bind Presentation Cover System
We at The Ann Arbor Real Estate Associates know the value of making a first impression. Uni Bind Presentation systems allows our team of real estate professionals to provide expedient, professionally presented data in moments. Thank you Uni-Bind for supporting our first impressions in the field.
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Amazing Delivery Times!
I ordered a large box of Unibind covers for our business and was really impressed that they were delivered the next - with free shipping I may add! It was so convenient and I will definitely order from here time and time again.
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We really like the professional appearance
We really like the professional appearance and the ease of use.
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