3M Diamond Grade Series 4000 (DG4000)
Personal & Trade orders welcome
prices shown inc. VAT, with ex. VAT shown for business customers.
Delivery Options:
Standard UK Delivery (2–3 working days): £3.49
Next Day Delivery¹ (Orders placed by 15:00 Mon–Fri): £4.95
¹ While we aim for next-day delivery, a small number of orders may experience delays due to courier handling.
Product Description
3M™ Diamond Grade DG³ Reflective Sheeting Series 4000 is a premium full-cube prismatic reflective sheeting designed for high-visibility signs, bollards, delineators, traffic islands, street furniture and demanding outdoor safety marking applications. Built for long-term external use, this high-performance reflective material offers excellent brightness and visibility where a certified, professional-grade reflective sheeting is required.
This material is suitable for regulated highway signage and other applications where a higher-grade reflective sheeting is needed. With its advanced full-cube prismatic construction, permanent pressure-sensitive adhesive and durable outdoor design, 3M™ Diamond Grade DG³ is a strong choice for councils, contractors, highways work, commercial sites and professional sign makers.
Key Features
- Genuine 3M™ Diamond Grade DG³ Series 4000 reflective sheeting
- Full-cube prismatic reflective technology for excellent brightness
- Designed for long-term outdoor use
- 12-year outdoor durability rating
- Approx. 430 micron thickness
- Permanent pressure-sensitive adhesive with white backing
- Suitable for high-visibility signs, bollards and safety markings
- Certified to ASTM D4956 Type XI and EN 12899-1
- Professional-grade reflective sheeting for demanding applications
Common Uses
3M™ Diamond Grade DG³ reflective sheeting is commonly used where high visibility, long-term outdoor performance and recognised reflective sheeting standards are important. It is suitable for professional signage, highways, commercial sites and safety marking applications where a premium reflective material is required.
- Highway bollards and delineators
- Road signs and traffic signs
- Council and contractor signage
- Pedestrian crossings and safety islands
- Street furniture and posts
- Commercial site safety marking
- Car park and access route markings
- High-visibility warning panels
- Professional sign making
Suitable Surfaces
This reflective sheeting is designed to be applied to suitable clean, dry, smooth and properly prepared sign substrates. It is commonly used on aluminium and other approved sign-making materials. Surface preparation is important for best adhesion and long-term performance. Always ensure the surface is clean, dry and free from dust, grease, moisture, loose material or contamination before application.
Product Specification
Product: 3M™ Diamond Grade DG³ Reflective Sheeting Series 4000
Type: Full-cube prismatic reflective sheeting
Thickness: Approx. 430 micron
Adhesive: Permanent pressure-sensitive adhesive
Backing: White backing
Outdoor Durability: 12 years
Certification: ASTM D4956 Type XI and EN 12899-1
Use: Highway signage, bollards, delineators, safety marking and professional reflective signs
Application: Long-term external use on suitable prepared substrates
Why Choose 3M™ Diamond Grade DG³?
3M™ Diamond Grade DG³ is one of the highest-performance reflective sheeting options available for professional signage and safety applications. The full-cube prismatic design provides excellent reflectivity, helping signs and markings remain visible in low-light conditions when illuminated by vehicle headlights or other light sources. It is the right choice where a premium, certified reflective sheeting is needed rather than a general-purpose reflective tape.
Alternative Option Available
For non-roadside and non-certified applications, our Prismatic Reflective Tape may be a more cost-effective option. It offers strong brightness and durability for uses such as driveways, car parks, warehouse bollards, commercial posts, private property marking and general visibility improvements where formal certification is not required.
Application Guide
- Make sure the surface is clean, dry, smooth and suitable for reflective sheeting application.
- Remove dust, grease, moisture, loose material and any surface contamination.
- Measure and cut the reflective sheeting to the required size.
- Position carefully before applying pressure.
- Apply evenly, avoiding trapped air where possible.
- Press firmly across the full surface to ensure good adhesive contact.
- Follow any relevant project, signage or manufacturer application requirements where certification or compliance is required.
Important Notes
This is a professional reflective sheeting product and should be applied to suitable prepared substrates. Suitability depends on the application, surface, installation method and any project or regulatory requirements. Where the material is being used for highway, roadside, council, construction or safety-critical work, the buyer or installer should confirm that the product, size, colour, application method and finished sign meet the required specification before use.
3M™ and Diamond Grade™ are trademarks of 3M Company. Flashback® is an independent supplier and is not affiliated with or endorsed by 3M Company.
Trade & Bulk Orders
Personal and trade orders are welcome. For larger quantities, repeat supply or trade enquiries, please contact us for bulk pricing.
Also Known As
This product may also be searched for as 3M Diamond Grade reflective sheeting, 3M DG3, 3M DG³, Series 4000 reflective sheeting, Type XI reflective sheeting, prismatic reflective sheeting, road sign reflective sheeting, highway sign sheeting, traffic sign reflective material and full-cube reflective sheeting.