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SpecChem SpecWeld

SpecChem SpecWeld

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SpecWeld Ready-to-Use, Re-Wettable Polyvinyl Acetate (PVA)

SpecWeld is a versatile, ready-to-use, re-wettable polyvinyl acetate (PVA) emulsion used as both an admixture and bonding agent. It is formulated to bond new concrete, underlayments, masonry, stucco, terrazzo, and Portland cement/sand mixes to both horizontal and vertical concrete surfaces. It is recommended for interior and exterior use but should not be used in areas subjected to constant moisture, hydrostatic pressure, or continuous water saturation.

  • Re-emulsifiable/Rewettable: Enhances the ability to re-bond.
  • Superior Adhesive Strength: Provides excellent bonding capabilities.
  • Durability: Increases the durability, adhesion, and curing of cement-based mortars and stucco.
  • Application Flexibility: Suitable for use even with delays between primer application and subsequent topping or underlayment.
  • VOC Compliant: Contains 0 grams per liter of VOCs, making it environmentally friendly.
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Application

SpecWeldserves as a primer/bonding agent for underlayments, plaster, and stucco. It can also be used as a bonding admixture for cement-based mortars and stucco, enhancing their adhesion and durability.

Application Guidelines

  • Surface Preparation:Ensure surfaces are clean, dry, structurally sound, and free of any contaminants.
  • Application Method:Apply SpecWeld uniformly at a rate of 150250 square feet per gallon using a brush, broom, or sprayer. Ensure full coverage and brush into the surface for a continuous film. It remains slightly tacky when dry, and any accumulation in low areas should be wiped up.
  • Drying Time:Typically 23 hours at 70°F. Adequate ventilation is required to maintain normal drying times; fans may be used to facilitate this.
  • Reapplication:On very porous surfaces, a second application may be necessary. Allow 23 hours between applications.

Packaging

Available in 55-gallon drums, 5-gallon pails, and 1-gallon jugs (four per case).

Shelf Life

Store in a cool, dry place in the original tightly closed container. SpecWeld has a shelf life of 1 year from the date of manufacture.

Standards

  • MeetsASTM C1059for Latex Agents for Bonding Fresh to Hardened Concrete Type I.
  • MeetsASTM C932for Surface-Applied Bonding Compounds for Exterior Plastering.