Grace® YTL™ -A PET Self-adhesive Waterproofing ... - W.R. Grace

Grace Building Envelope SystemsGrace ® YTL -A PET Self-adhesiveWaterproofing MembraneSelf-adhesive waterproofing membrane forroofings, basement and flat deck applicationsDescriptionGrace ® YTL-A PET waterproofingmembrane is a high performance, coldapplied,flexible, preformed waterproofmembrane combining a PET film witha unique self-adhesive rubber bitumencompound.Applications• Basement• Roof• Flat decks• Wet room• Civil air defence• Grace YTL-A PET self-adhesivewaterproofing membrane should be laid bypeeling back the protective silicone releasepaper and applying the self-adhesive faceon to the surface to ensure good initialbond.• Adjacent rolls are aligned and overlapped60 mm minimum at the sides and 150 mmat the ends, and the overlaps well rolledwith a firm pressure using a Bituthene laproller to ensure complete adhesion andcontinuity between layers.• Following application and inspection, careshould be taken to prevent damage byfollowing trades. As soon as practicableAdvantagesSuper-strong bonding powerMinimised water migrationExcellent self-healing capabilityWide, convenient and reliableConvenient and rapid installationSafe and environmentally-friendlyThe waterproofing membrane is integrated with the substrate after installation. Excellent bondin lapping area.The waterproofing membrane bonds well with substrate to ensure continuity. Leakage or waterpath is limited to a confined area even when there is damage on the membrane.The waterproofing membrane has the resilience of rubber and super-strong self-adhesion.It provides a good wrapping function for nails and other sharp objects. The waterproofingmembrane can self-heal if punctured by nails or other sharp objects.2m-wide waterproofing membranes are available for installation in a larger area. It eliminatesthe need for overlapping of multiple membranes, is faster to install and more effective.Simple, reliable, reduced low labour cost with benefit of site-programmed installation.No heating is required at the installation site, thereby eliminating the potential hazard toenvironment during installation and saves energy.Installation• Measures should be taken to ensure thatall surfaces are free from ice, frost orcondensation. Roof slab surfaces must bedry, and free from sharp protrusions, andany hollows to be filled with high strengthmortar.• Horizontal and vertical faces must besmooth, regular, dry and free from nails.Prime the horizontal and vertical surfaceswith one coat of Bituthene ® Primer appliedby brush or roller at a rate of 6-8 sqmper litre depending on the porosity of thesurface, and allow to dry completely beforethe application of Grace YTL-A PET selfadhesivewaterproofing membrane.after the application, Grace YTL-A PETadhesive membrane should be protectedfrom exposure to the weather and physicaldamage using Servipak ® protectionboards, insulation or Hydroduct ® drainagecomposites laid dry.• Any punctured or damaged areas shouldbe cleaned and patched using GraceYTL-A PET adhesive membrane withminimum 50 mm laps all around.