CETCO

Model LDC 60 - Fluid Applied Waterproofing Membrane

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A elastomeric waterproof membrane, LDC 60 cures to form a seamless barrier that forms tenacious bond to concrete to prevent lateral water migration. The inherent toughness and elasticity of LDC 60 enables it to bridge small structural or shrinkage cracks which may develop in the substrate.

LDC 60 is a single component, moisture cure modified polyurethane waterproofing membrane. LDC 60 cures to form a seamless, elastomeric waterproof membrane that is positively bonded to the substrate. The inherent toughness and elasticity of LDC 60 enables it to bridge small structural or shrinkage cracks which may develop in the substrate. Its tenacious bond to concrete substrates prevents lateral water migration.

LDC 60 is typically applied by roller, or squeegee. Its fluid application allows it to be easily installed at difficult areas, such as around multiple pipe penetrations and over irregular substrates.

  • LDC 60H – Horizontal Grade (self-leveling)
  • LDC 60V – Vertical Grade (roller applied)

LDC 60 is designed for below-grade vertical and horizontal surfaces, as well as, subsurface applications above grade. Typical application is between the structural slab and wearing course on parking garages, plaza decks, balconies, roof decks, terraces, mechanical rooms, and fountains. Other applications include concrete foundation walls, masonry block foundation walls, planters, tunnels, and earth-covered structures.

Limitations: LDC 60 should not be used as an exposed or wearing surface. Do not apply to damp or contaminated surfaces. Metal deck pan forming should be vented. Substrate surface temperature should be above 4.4°C (40°F). Use only with adequate ventilation.

Both LDC 60V and LDC 60H are available in 18.9 liter (5-gallon) pails; 36 pails per pallet. Pail weight is 27.2 Kg (60 lbs.).

Surface Preparation: New concrete should be water cured, troweled, followed by a light, hair broom finish and in place for 14 days minimum, 28 days preferred. If curing compounds are required, use a type that selfdissipates within several days. Surfaces shall be structurally sound, dry, and free of oil, grease, dirt, laitance, curing and release agents, and other contamination which may affect the adhesion of the membrane. Mortar joints on masonry block walls should be struck flush with the block surface.

Remove concrete fins, ridges or other projections to provide a smooth surface. As required, grind or fill surface at cold joints where each pour is at a different plane. Fill tie-rod holes, honeycombs, rock pockets, spalls or other voids and indentations with non-shrink grout. Clean metal to expose a bright surface.

Detail Work: As required, grind or saw cut substrate cracks greater than 1.8 mm (1/16”) in width to 6 mm (1/4”) wide by 6 mm (1/4”) deep. Clean joint and apply wax or bondbreaker tape at base of saw cut cracks and fill with sealant. Apply a 100 mm (4”) wide, 1.5 mm (0.060”) thick stripe coat of LDC 60 membrane over all saw cut cracks, concrete cold joints, and hairline cracks.

Apply a 18 mm (3/4”), 45 degree angle sealant cant at the juncture of all horizontal and vertical surfaces, including at pipes, vents and other projections. Extend membrane stripe coat over cants and up the vertical wall minimum 150 mm (6”) or as shown on drawings.

Membrane Application: A pply L DC 6 0 a t 2.3 sq m per 3.7 liters (25 sq. ft. per gallon) or as required to obtain 1.5 mm (0.060”) thickness, to the entire area to receive waterproofing, including over all detail coats.

On horizontal deck surfaces, the preferred method of LDC 60 H application is with a notched squeegee. On vertical surfaces, the preferred method of LDC 60V application is with a chemical resistant, heavy nap roller. Vertical applications typically require two passes to achieve the proper material thickness.

Protection: LDC 60 must be protected from damage after installation. Applicable CETCO protection material should be used per jobsite conditions. Install protection course on vertical surfaces immediately after membrane has cured (36 hours at 23.8°C (75°F)). Install protection course on horizontal surfaces immediately following successful flood testing (if required). If flood test is delayed, install a temporary covering to protect the membrane from damage.

Flood Test: After membrane has cured a minimum 36 hours, plug drains and provide necessary barriers to contain flood water. Flood deck with a 25 mm (1”) depth of water and allow to stand for 24 hours. Check for leaks and immediately make repairs if required. Retest after any repairs have been made.

Clean Up: Before LDC 60 cures, stains or spills to adjacent areas can be cleaned with xylene. CAUTION: Do not wash skin with solvents. Xylene is a flammable solvent. Observe solvent manufacturer’s instructions and precautions.

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