MasterSeal 555 – Flexible, polymer cement waterproofing slurry

DESCRIPTION

MasterSeal 555 is a two-component product consisting of Part A (liquid) and Part B (powder), forming a flexible waterproofing coating with excellent weathering resistance and crack-bridging capability upon mixing.

RECOMMENDED USES

MasterSeal 555 is ideal as a waterproofing membrane below concrete, mortar, tiles, etc., suitable for applications in:

Flat and pitched roofs
Wet areas like bathrooms and kitchens
Terraces and balconies It is also applicable as a waterproofing coating for various concrete structures such as:
Bridge parapets, beams, and pillars
Reservoirs, sumps, and tanks
Foundations below and above ground

However, it’s not recommended for use as a trafficable membrane. For this purpose, it’s advised to protect the cured membrane by covering it with concrete or tiles.

FEATURES AND BENEFITS

Flexible nature: Bridges cracks up to 2 mm during normal movements.
Water vapor permeability: Allows the surface to breathe, preventing vapor pressure buildup.

PERFORMANCE DATA

Water vapor permeability (ASTM E96:94): <30 g/m²/day
Tensile strength (ASTM D412-92): 1.52 N/mm²
Elongation at break (ASTM D412-92): 250%
Crack bridging (adopted from ASTM 836-89): Up to 2mm
Hardness (ASTM 2240 – 9), shore A: 60
Flexibility test at 10x magnification: No crack

PROPERTIES

Part A: Liquid, White
Part B: Powder, Grey
Mixing proportions by weight (Part A: Part B): 1:1.25
Density of mixed material: 1.55 kg/L
Application temperature: 5°C-35°C
Pot life @ 20°C: 2 hrs, @ 30°C: 1 hr
Working time @ 30°C: 60 mins
Curing time @ 30°C: Touch dry – 45 mins, recoating time – Min. 2½ hrs, full cure – 28 days

APPLICATION

Surface Preparation: Ensure surfaces are structurally sound, clean, and free from cement laitance, loose particles, oil, grease, etc. Fill irregularities with a MasterEmaco repair mortar for a smooth surface. Saturate the substrate with clean water before applying MasterSeal 555.

Mixing: Mechanical mixing using a slow-speed electric drill is recommended. Gradually add Part B to Part A, mixing for at least 2 minutes until a homogeneous consistency is achieved.

Placing: Ensure the treated area is shaded from direct sun and wind to prevent rapid drying of the coating.