Certified Business
With over 100,000 orders
With over 100,000 orders
Blanke AQUA 90° Waterproofing Corners
Fast Shipping
Easy Returns
Secure Checkout
At a Glance
Quick Decision Guide
Corner Type
Inside
Size
4"
Quantity
1
System
Blanke AQUA-SHIELD
Primary Use
Waterproofing 90° Inside Corners
Tile Compatibility
Ceramic Tile & Stone
Wet Area Use
Showers & Bathrooms
Installation
Preformed Corner
Why Choose This Product
Key Benefits
Preformed Corner Treatment
Eliminates cutting and field-forming flat membrane around 90° corners
Dedicated Configurations
Separate inside and outside options fit their respective changes of plane
Consistent Coverage
Formed construction helps maintain waterproofing continuity at corners
Reliable Thinset Bonding
Fleece-laminated surfaces bond with thinset mortar
System Integration
Works with Blanke AQUA-SHIELD membrane and waterproofing accessories
Wet-Area Applications
Supports tiled showers, bathrooms, steam rooms and other wet areas
Product Information
Product Details
Specifications
Brand
Blanke®
Part Number
541-900
UPC
4016505064429
Product Type
Preformed Waterproofing Corner
Corner Type
Inside
Size
4"
Corner Angle
90°
Quantity
1
System Compatibility
Blanke AQUA-SHIELD
Application
Waterproofing Inside Changes of Plane
Suitable Coverings
Ceramic Tile & Stone
Suitable Areas
Showers, Bathrooms & Wet Areas
About This Product
Preformed Waterproofing Corners for 90° Transitions
Blanke® AQUA 90° Waterproofing Corners create continuous waterproof transitions at critical changes of plane in tiled wet areas. Their preformed construction eliminates the need to cut, fold, and shape flat membrane material around corners, helping installers achieve consistent coverage within Blanke AQUA-SHIELD waterproofing assemblies.
Dedicated Inside and Outside Corner Configurations
Choose part 541-900 for inward-facing corners such as wall-to-wall and wall-to-floor transitions or part 540-900 for outward-facing 90° corners. Both configurations have a nominal 4" width and are formed specifically for their respective corner orientation.
Fleece-Laminated Polyethylene Construction
Each corner uses polyethylene film with fleece laminated to both sides. The fleece provides a bonding surface for thinset mortar, allowing the corner to integrate with AQUA-SHIELD membrane, seam tape, and adjoining waterproofing components beneath ceramic tile and stone.
Installation Within the AQUA-SHIELD System
Install the corner on a clean, flat, dry, and load-bearing substrate using thinset mortar applied with a 1/4" × 3/16" V-notched trowel. Press the corner into the mortar with the flat side of the trowel to establish complete contact and remove air pockets. Adjoining waterproofing components must overlap by at least 2". Blanke AQUA-SEAL should be used at overlapping seams in constantly or extremely moist applications as directed by Blanke.
Common Questions
Frequently Asked Questions
What are Blanke AQUA 90° Waterproofing Corners used for?
They are preformed system accessories used to waterproof 90° changes of plane within Blanke AQUA-SHIELD tile and stone installations.
What is the difference between the inside and outside corners?
The inside corner is formed for inward-facing transitions such as wall-to-wall and wall-to-floor corners. The outside corner is formed for outward-facing 90° transitions.
Which part number corresponds to each corner type?
Part 541-900 is the 4" inside corner, and part 540-900 is the 4" outside corner.
What material are the waterproofing corners made from?
The corners use polyethylene film with fleece laminated to both sides. The fleece provides a bonding surface for thinset mortar.
Are Blanke AQUA Waterproofing Corners self-adhesive?
No. These preformed corners are embedded in thinset mortar as part of the AQUA-SHIELD waterproofing assembly.
How are the AQUA 90° Corners installed?
Apply thinset mortar to a clean, flat, dry, and load-bearing substrate with a 1/4" × 3/16" V-notched trowel. Press the corner into the mortar with the flat side of the trowel, establishing complete contact and removing air pockets.
How much should adjoining AQUA-SHIELD components overlap?
Blanke requires adjoining AQUA-SHIELD components to overlap by at least 2" to create watertight connections.
Should AQUA-SEAL be used when installing the corners?
Blanke directs installers to use AQUA-SEAL waterproofing adhesive at overlapping seams in applications exposed to constant or extremely moist conditions.
Can these corners be used in steam rooms?
Yes. They can be incorporated into properly installed AQUA-SHIELD assemblies, which provide waterproofing and vapor protection for steam rooms and other continuous wet areas.