• Seamless Waterproofing: Eliminates lapping, seaming, and pre-cutting
• Cold-Applied: No hot kettles or flames required
• High Build or Standard Options: For flexible system design
• Can Be Applied to Damp Concrete: Speeds up installation timeline
• Accommodates Structural Movement: Excellent crack-bridging capability
• Chemical & Weather Resistant: Resists water, salts, acids, and bacterial attack
• Wide Temperature Range: Serviceable from -40°F to +120°F
• Verified Performance: Passes ASTM C1305 & ASTM C836
• Multi-Surface Compatibility: Compatible with concrete, plywood & incidental metal
• Certified in Canada: CGSB 37.58-M86 compliant

Sikalastic® HLM 5000 GC is ideal for critical waterproofing needs in both new construction and retrofit settings:

• Below-grade waterproofing
• Between-slab waterproofing
• Foundation walls & retaining walls
• Planter boxes & balconies
• Parking decks and plaza decks
• Split slabs & tunnels
• Culverts & horizontal decks
• Cavity walls and blindside applications

Common Substrates:

• Concrete (standard and damp)
• Exterior-grade plywood / OSB (APA-compliant)
• Masonry
• Incidental metal penetrations
• Block walls (with primer)

Surface Prep

• Surfaces must be clean, sound, dry, and free of oil, dust, and curing compounds
• Porous block requires priming (e.g., with Sikadur®-22 Lo-Mod FS or Sikalastic® FTP Primer)
• Fill voids and honeycombs to prevent blisters
• All expansion joints, static joints, and protrusions must be sealed or pre-striped before final membrane application

Installation

• Apply by squeegee, brush, roller, or trowel
• Apply when ambient temperatures are between 40°F and 90°F

Recommended thickness:

• Standard system: Single layer at 60 mils
• High-build system: Two coats at 60 mils each (120 mil total)

Typical yield per gallon:

• 60 mils = 25 ft²/gal
• 90 mils = 18 ft²/gal
• 120 mils = 13 ft²/gal

Use a wet film thickness gauge to verify application thickness. A flood test (2" depth for 24–48 hours) is recommended for horizontal installations.

Curing Time

• Tack-free in 24–48 hours at 75°F and 50% RH
• Protect from traffic and backfill until fully cured
• Install protection board or drainage mat within 90 days of application