Waterproofing Membranes
Royston Membranes are reinforced rubberized bitumen based membranes which provide excellent tensile strength and puncture resistance. Royston® Membranes provide superior support and strength in the most demanding conditions with the added benefits of fast installation and lower traffic control costs. Royston® Membranes are made with state-of-the-art materials which increases the life expectancy and protects against structural damage caused by moisture permeation.
The standard size is 48 inches x 50 feet. Custom sizes are available.
Need more info? Contact us
Need a sample? Request it here
Need Data Sheets? Access to Library
Yes, unless the asphalt wearing surface is less than 12 months old, Chase manufactures a low V.O.C. primer, a sprayable primer, and a cold temperature primer.
Need more info? Contact us
Need a sample? Request it here
Need Data Sheets? Access to Library
Yes, The Royston 104 AHT can be applied to vertical surfaces. Other Royston Membranes may be applied to vertical surfaces. Please check with the Chase technical department for specific recommendations.
Need more info? Contact us
Need a sample? Request it here
Need Data Sheets? Access to Library
Yes, in order to properly activate the bitumen adhesive primer, an asphalt overlay has to be installed. The minimum requirements for the asphalt overlay are a 1-1/2inch lift thickness and a minimum asphalt temperature of 290°F at the screed.
Need more info? Contact us
Need a sample? Request it here
Need Data Sheets? Access to Library
Chase has a Bridge Membrane Installation Guide. Please click here to get the “Installation Guide”.
Need more info? Contact us
Need a sample? Request it here
Need Data Sheets? Access to Library
Yes, an overlap is required along the longitudinal joint. There is a 3-inch leading edge that promotes compound to compound contact.
Need more info? Contact us
Need a sample? Request it here
Need Data Sheets? Access to Library
Chase manufactures 104 CM Mastic that is applied on the exterior of the transverse joints. The104 CM Mastic will both seal and waterproofing the joint.
Need more info? Contact us
Need a sample? Request it here
Need Data Sheets? Access to Library
View some Royston Membranes project cases.
- Handford SX Asphalt Barrier Phase 1
- Jewel Avenue Bridge Rehabilitation
- Roosevelt Avenue Bridge Rehab
- Spring Street Bridge Deck Replacement
You can also read our blogs on this topic:
Need more info? Contact us
Need a sample? Request it here
Need Data Sheets? Access to Library
| Royston | Competition |
| Requires only a 1-1/2” lift thickness | Up to a 2” lift thickness required |
| Tack coat is not required | Tack coat recommended |
| Low-temperature application, down to 25°F. | Typically, 40°F and rising |
- 3” Leading edge creates an adhesive to adhesive water-tight seam
- Factory-made sheet ensures uniform, consistent thickness
- Flexible material allows for movement due to thermal expansion and contraction
- Fiberglass reinforcement provides increased tensile strength and puncture resistance
How to Waterproof a Bridge Deck Using Royston® Membranes
How to Install Royston® Membranes
How to Install Royston® Edge Sealer
Shingle Style Installation Process For Sheet Membranes
Royston Waterproofing membrane curb detail
Royston Waterproofing Membrane Drain Detail
General Purpose Membrane |
Royston® 10A Waterproofing Membrane 
- Thickness of 60 ± 5 mils
- High strength fiberglass inner core sandwiched between two layers of polymer modified bitumen
- Unique 3- inch leading edge guarantees a positive compound-to-compound seal at the overlap.
- Primer used to provide superior bonding to the substrate
General Purpose Membrane |
Royston® 10A-65 Waterproofing Membrane
- Thickness of 70 ± 5 mils
- High strength fiberglass inner core sandwiched between two layers of polymer modified bitumen
- Unique 3- inch leading edge guarantees a positive compound-to-compound seal at the overlap.
- Primer used to provide superior bonding to the substrate
Bridge Deck / Roadway Membranes |
Royston® 10A Easy Pave Bridge Deck Membrane
- Thickness of 60 ± 5 mils
- High strength fiberglass inner core sandwiched between two layers of polymer modified bitumen
- Spun polyester surface layer provides protection against construction traffic
- Unique 3- inch leading edge guarantees a positive compound-to-compound seal at the overlap
Bridge Deck / Roadway Membranes
Royston® 10A-65 Easy Pave Bridge Deck Membrane
- Thickness of 70 ± 5 mils
- High strength fiberglass inner core sandwiched between two layers of polymer modified bitumen
- Spun polyester surface layer provides protection against construction traffic
- Unique 3- inch leading edge guarantees a positive compound-to-compound seal at the overlap
Bridge Deck / Roadway Membranes
Royston® 10AN Easy Pave Bridge Deck Membrane
- Thickness of 60 ± 5 mils
- Impregnated NON-woven fiberglass inner core sandwiched between two layers of a polymer modified bitumen
- Spun polyester surface layer provides protection against construction traffic
- Unique 3- inch leading edge guarantees a positive compound-to-compound seal at the overlap
Architectural Membranes
Royston® 104AHT Architectural Membrane 
- Thickness of 60 ± 5 mils
- High strength fiberglass inner core sandwiched between two layers of polymer modified bitumen
- Used as an architectural waterproofing membrane in commercial and residential below grade applications
Architectural Membranes
Royston® 108ARN Architectural Membrane 
- Thickness of 70 ± 5 mils
- Impregnated NON-woven fiberglass inner core sandwiched between two layers of a polymer modified bitumen
- Woven polypropylene surface layer is bonded to the top functioning as a protective barrier during backfill operations in vertical applications
- Specifically designed for use in architectural applications and is not to be used in roadway applications
Primer-Membranes
Royston® Roybond 713A
- Standard primer used with Royston® Waterproofing Membranes.
- Solvent-based, fast drying, single component, rubber resin primer.
- Adheres firmly to properly prepared concrete, wood, aged asphalt, metal or other common construction materials.
- Used when ambient and substrate temperatures are 45°F and rising.
Primer-Membranes
Royston® Roybond 713B
- Low VOC version of the Roybond 713A primer.
- Solvent-based, fast drying, single component, rubber resin primer.
- Adheres firmly to properly prepared concrete, wood, aged asphalt, metal or other common construction materials.
- Used when ambient and substrate temperatures are 45°F and rising.
Primer-Membranes
Royston® Roybond 740
- Used in low temperature installations of Royston® Waterproofing Membranes.
- Used when ambient and substrate temperatures are between 25° – 45°F and rising
- Solvent-based, fast drying, single component, rubber resin primer.
- Adheres firmly to properly prepared concrete, wood, aged asphalt, metal or other common construction materials.
Primer-Membranes
Royston® Roybond 750
- Sprayable version of 713A primer.
- Applied using airless spray equipment when ambient and substrate temperatures are 45°F and rising.
- Solvent-based, fast drying, single component, rubber resin primer.
- Adheres firmly to properly prepared concrete, wood, aged asphalt, metal or other common construction materials.
Joint Sealant-Membrane
Royston® Flex Flo Adhesive Sealant (FFAS) 
- Used to adhere and seal the Royston® line of waterproofing membranes to concrete, asphalt, steel or wood substrates along perimeter locations, curbs, and penetrations
- A rubberized elastomeric urethane accommodating a wide range of expansion, contraction, and shear stresses caused by vibration and thermal movement
- Used to adhere and seal the Royston® line of waterproofing membranes to concrete, asphalt, steel or wood substrates along perimeter locations, curbs, and penetrations
- Used in both vertical and horizontal Royston® membrane applications on any structure
- Applied both underneath as well as on top of the membrane, acting as an adhesive as well as a sealant to prevent any water intrusion into the underlying substrate
- Zero V.O.C., two component adhesive sealant which cures over a broad temperature range to a tough adherent rubber
Joint Sealant-Membrane
Royston® 104 Caulkable Mastic (104CM)
- Used as a secondary sealant along the seams of an installed membrane system
- A heavy-bodied, rubberized asphalt, single component sealant to be used with Royston® waterproofing membrane installations
- Applied as a thin bead of sealant on the surface of Royston® Membranes
- Creates an impenetrable barrier that prevents the intrusion of moisture at seams, protrusions and termination points
- Will not dry out, crack or generally deteriorate
New Product
Royston® 10A 65P Waterproofing Membrane
- Fast Installation
- Lower Traffic Control Costs
- Thickness of 60 ± 5 mils
- Simplifies Project Scheduling
- Specially formulated to meet PennDOT’s elongation requirements
