SIKA · AUTHORIZED PROJECT DISTRIBUTOR · SPACE ARC ENGINEERING
SikaProof-315 HDPE SG W IN
Pre-applied bonded HDPE membrane, 315 W variant for heavy-duty below-ground waterproofing
Product Overview
SikaProof-315 HDPE SG W IN is a pre-applied, fully bonded waterproofing sheet that pairs a virgin HDPE layer with a high-bond pressure-sensitive adhesive and an inorganic sand-sprinkled protective face. Laid before reinforcement and casting, it forms a permanent bond to fresh concrete so that water cannot migrate laterally around the buried structure. The heavier W build offers higher puncture resistance and a thicker composite for demanding deep-basement and tunnel work, and its heat-weldable selvedge gives dependable lap joints. It serves basements, subways, tunnels, base slabs, walls and footings. Space Arc Engineering, an authorized Sika distributor in India, supplies this membrane with technical detailing support for infrastructure, industrial, commercial and residential projects.
Features & Benefits
- Thicker composite (>=1.8 mm) for heavy-duty, deep below-ground duties
- Permanent full bond to cast concrete prevents lateral seepage
- Heat-weldable selvedge produces continuous watertight overlaps
- Higher static puncture resistance (1200 N range) for tough sites
- Chlorine-, plasticizer- and phthalate-free for cleaner installation
- No protective screed required, saving programme time and cost
Technical Highlights
| Coverage | Supplied in 20 m rolls at 1.2 m, 1.5 m or 2.0 m width, individually PE-foil wrapped; allow laps per the TDS. |
| Strength | Tensile strength >=25 MPa, elongation >500% and static puncture resistance of around 1200 N (+/-10%). |
| Performance | Resists a hydrostatic head greater than 71 m with adhesion in peel above 1500 N/m at 7 days. |
| Application Conditions | Install at +5 C to +40 C ambient and substrate; concrete must be placed within 45 days. |
| Packaging | HDPE membrane composite, effective thickness >=1.8 mm, individually wrapped 20 m rolls. |
Applications
- Deep metro stations and cut-and-cover tunnel structures
- Heavy industrial basements and underground utility vaults
- High-rise commercial raft slabs under significant water head
- Water-retaining and below-grade civil structures
- Premium residential basements requiring durable protection
SPACE ARC ENGINEERING · AUTHORIZED DISTRIBUTOR
Product image & sample available on request
Technical Data
| Type | Pre-applied, fully bonded HDPE sheet membrane (W) |
| Base | Virgin HDPE with PS adhesive and sand topping |
| Effective thickness | >=1.8 mm composite |
| Strength | Tensile >=25 MPa; puncture ~1200 N |
| Roll size | 20 m length; 1.2 / 1.5 / 2.0 m width |
| Application temp. | +5 C to +40 C |
Datasheet & Documents
Request the Technical Data Sheet, method statement and safety data sheet from Space Arc Engineering.
Request Quote / Availability
+91 9999155255
+91 7290089007
info@space-arc.com
Frequently Asked Questions
What makes the 315 W variant heavy-duty?
It offers a thicker composite of at least 1.8 mm and higher static puncture resistance in the 1200 N range, making it suited to deep basements and demanding tunnel works.
How are joints between sheets sealed?
The membrane has a heat-weldable selvedge that allows continuous, watertight overlap joints. Follow the TDS for lap widths and welding details.
Is a separate protective screed needed?
The product is designed without the need for a protective screed; refer to the TDS for substrate preparation and protection guidance specific to your project.
What temperatures suit installation?
Lay the membrane between +5 C and +40 C ambient and substrate, and ensure concrete is cast within 45 days of installation.
Where can I buy SikaProof-315 HDPE SG W IN in India?
Space Arc Engineering is an authorized Sika distributor in India. Call +91 9999155255 or email info@space-arc.com for pricing and project assistance.
Related Products
- SikaProof-315 HDPE SG IN — Standard 315 grade for general below-ground waterproofing.
- SikaProof-312 HDPE SG W IN — Lighter W-variant membrane for less demanding water pressures.
- SikaSwell A — Swellable joint profile that completes construction-joint sealing.
- Sikadur-Combiflex Adhesive IN — Epoxy adhesive for movement-joint and detail waterproofing.
- Sika Injection-201 IN — Polyurethane injection resin for sealing localised leaks.
Buy SikaProof-315 HDPE SG W IN — Sika Distributor in India
Space Arc Engineering is an Authorized Project Distributor supplying Sika products for infrastructure, industrial, commercial and residential projects across India.
+91 9999155255 | +91 7290089007 | info@space-arc.com
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Other waterproofing systems we supply & apply across Delhi NCR and pan-India.