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Sika Drainage Mat 420 4'x50' Roll
Sika Drainage Mat 420 is a dimpled polypropylene drainage composite in a 4 ft x 50 ft roll for plaza decks and waterproofed roofs. A nonwoven filter fabric sits over a high-flow core rated approximately 15,000 psf.
- Dimpled polypropylene core with nonwoven filter fabric
- 4 ft x 50 ft roll for plaza decks and split slabs
- Compressive strength approximately 15,000 psf
$185.15
Availability:
Out of stock
Sika Drainage Mat 420
Sika Drainage Mat 420 is a prefabricated drainage composite with an impermeable high-flow dimpled polypropylene core, a nonwoven polypropylene filter fabric on top, and a polyethylene membrane protection film on the bottom. This 4 ft x 50 ft roll collects and conveys water on plaza decks, split slabs, planters, and waterproofed roofs while protecting Sikalastic membranes. Compressive strength is approximately 15,000 psf with approximately 0.40 in core thickness and flow of approximately 21 gal/min/ft.
Key Features
- Impermeable high-flow dimpled polypropylene drainage core
- Nonwoven polypropylene filter fabric retains soil and sand
- Polyethylene protection film cushions the waterproofing membrane
- Compressive strength approximately 15,000 psf (ASTM D1621)
- Flow approximately 21 gal/min/ft at hydraulic gradient 1
- Core thickness approximately 0.40 in
Applications
- Plaza decks and split-slab waterproofing assemblies
- Planters and roof gardens over protected membranes
- Collects and conveys excess water beside Sikalastic RoofPro and Sikalastic-320
- Soil, sand, or stone ballast over nonwoven filter fabric
Technical Specifications
| Property | Value |
|---|---|
| Manufacturer | Sika |
| Product | Sika Drainage Mat 420 |
| Unit | 4 ft x 50 ft roll |
| Core | Dimpled polypropylene |
| Filter fabric | Nonwoven polypropylene |
| Compressive strength | Approximately 15,000 psf |
| Core thickness | Approximately 0.40 in |
| Flow | Approximately 21 gal/min/ft |
| Roll weight | Approximately 41 lb |
Product documents: Sika Drainage Mat Product Data Sheet (PDF)
Frequently Asked Questions
What assemblies suit Sika Drainage Mat 420?
Plaza decks, split slabs, planters, and roof gardens where a drainage layer also protects the waterproofing membrane.
What core and fabric does Sika Drainage Mat 420 use?
An impermeable dimpled polypropylene core with nonwoven polypropylene filter fabric on top and a polyethylene protection film on the bottom.
What compressive strength does Sika Drainage Mat 420 hold?
Approximately 15,000 psf under ASTM D1621.
What flow rate does Sika Drainage Mat 420 deliver?
Approximately 21 gal/min/ft at hydraulic gradient 1 under ASTM D4716.
What ballast works over Sika Drainage Mat 420?
Soil, sand, or stone ballast over the nonwoven filter fabric. Use woven-fabric Drainage Mat 720 when placing fresh concrete or grout over the mat.
What size is Sika Drainage Mat 420?
The roll is 4 ft x 50 ft.
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