SpecWeld

A ready-to-use, re-wettable polyvinyl acetate (PVA)

SpecWeld is a ready-to-use, re-wettable polyvinyl acetate (PVA) emulsion admixture and bonding agent that bonds new concrete, underlayments, masonry, stucco, terrazzo, and Portland cement/sand mixes to horizontal and vertical concrete surfaces. Recommended for interior and/or exterior use not subjected to constant moisture, hydrostatic pressure, or continuous water saturation.

Re-emulsifiable/re-wettable; VOC compliant
Excellent bonding agent/superior adhesive strength
Admixture drastically increases durability, adhesion and curing of cement base mortars and stucco
Can be used when there is a delay between primer application and subsequent topping or underlayment

Application

SpecWeld serves 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 150-250 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 2-3 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 2-3 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

Meets ASTM C1059 for Latex Agents for Bonding Fresh to Hardened Concrete – Type I.
Meets ASTM C932 for Surface-Applied Bonding Compounds for Exterior Plastering.