BOSTIK POWERPROOF PU-D ONE-CEMENT POLYURETHANE DISPERSION WATERPROOFING MEMBRANE GREY ( 4L )

DESCRIPTION

Powerproof PU-D is a single-component, ready-to-use, solvent-free, permanent and highly elastic waterproofing membrane. Once cured, it provides a tough membrane able to withstand a continuous cycle of weathering and prevents water leakage.

SURFACE PREPARATION

The concrete substrate must be sound and of sufficient compressive strength (minimum 25 N/mm²) with a minimum pull strength of 1.5 N/mm². Substrate moisture should not exceed 5% (use moisture meter or polyethylene test in accordance to ASTM D 4263). New concrete structures need to dry for at least 28 days. The substrate must be clean and free from all traces of loose materials, old coatings, curing compounds, release agents, laitance, oil, grease, etc. It should be saturated-surface-dry (SSD) condition. Structurally unsound layers or surface contaminants must be mechanically removed by abrasive blast tracking, shot blasting, scarifying, or grinding. Substrates heavily impregnated with oil must be cleaned by torching, using suitable solvent or degreaser substance. Weak concrete must be removed and surface defects such as blowholes and voids must be fully exposed. All ducts, loose and friable material must be completely removed from all surfaces, preferably by brush and/or vacuum, before application of product. Substrate moisture should be at most 5%.

• Concrete slab must be minimum of 4 weeks old.
• Minimum substrate temperature +5°C.
• Maximum substrate temperature +35°C.
• Maximum air humidity 85% r.h.
• Observe dew point temperature
• For best result, maximum thickness of Powerproof PU-D is 0.5 mm dry film thickness per coat.
• Newly applied surfaces should be protected from
  water for a minimum of 24 hours.
  

For New Construction: (Exposed-type roof deck application) 

1. For a well-prepared and mechanically sound concrete slab, apply necessary concrete topping, screed or self-leveling compound to attain desired slope-to-drain surface level. For areas with a thickness below ½ inch, apply Bostik Powerfix as adhesion enhancer (see the separate TDS for more information). 

2. Anticipate cold joints during screeding/topping pouring. With these joints, create a V-cut profile using concrete • UV-stable • Paintable with water-based paint • Fast-curing • Easy to apply • For indoor and outdoor application • Highly and permanently elastic membrane • Highly compatible to porous substrates, i.e. concrete, fibre-cement board, etc. • High water resistance • Seamless and monolithic • Crack-bridging capability up to 2mm FEATURES AND BENEFITS BOSTIK POWERPROOF PU-D I 09/21 grinder or router with the size of approximately 2 inches on both edge, diagonally. 

3. Apply Bostik PU sealant (e.g. Seal n’ Flex 1) to fill completely the V-cut profile, about 1.5 inches in depth. Once

AREAS OF APPLICATION

For Exposed Areas:

• Roof Deck

• Balcony

• Terraces

• Canopy

• Facade

• Firewall

• GI Sheet roofing - to prolong its service life

• Suitable for use in potable water storage tanks

• Can be used without topping for zero to light traffic areas

For Concealed/Buried Areas:

• Buried waterproofing of roof slabs, balconies, and terraces

• Undertile waterproofing of wet areas such as toilets,

bathrooms and kitchens