TAMMSWELD is a rewettable liquid bonding agent and polymer modifier for concrete and cement mortars. TAMMSWELD is a high film build, ethylene vinyl acetate copolymer emulsion.
Features & Benefits
- High build bonding agent or polymer admixture
- Increases bond strength
- Improves durability
- Long open time
- Excellent coverage at 1000 square feet per 5-gallon pail
- Concrete block
- Gypsum board
- Interior and exterior surfaces
Specifications / Compliances
- ASTM C1059, Type I
TAMMSWELD is packaged in 5 gal (18.9 L) pails and in cases of 1 gal (3.8 L) jugs (6 jugs per case).
DIRECTIONS FOR USE
Surface must be clean, dry and structurally sound. The substrate must also be free of all curing
compounds, form release agents and any other contaminants, which may prevent the proper adhesion of TAMMSWELD.
The preferred method of surface preparation is mechanical abrasion. For oil-contaminated surfaces, using steam cleaning
in conjunction with a strong emulsifying detergent may be considered. Rinse thoroughly with potable water. Allow the
concrete to dry before applying TAMMSWELD.
Application, Bonding Agent:
Stir TAMMSWELD thoroughly before use. Do not dilute. For hand application, wet brushes
or rollers before use and shake out excess water. For larger areas or faster application, use airless spray equipment with 0.015
in. to 0.020 in. (0.38 to 0.51 mm) orifice size spray tips. Hold spray gun 12 to 18 inches (30 to 46 cm) from the surface and
apply TAMMSWELD using a cross coat technique consisting of a horizontal pass followed by a vertical pass. Extremely porous
surfaces may require two coats of TAMMSWELD.
Allow the TAMMSWELD to dry before placing repair mortars, concrete, or toppings. TAMMSWELD will dry in approximately
one hour depending on the temperature and humidity. If more than 7 days pass between TAMMSWELD application and
placement of the concrete, topping, or mortar, check several areas to ensure adequate adhesion. Make test applications on
Application, Polymer Modifier:
When using TAMMSWELD to produce a polymer modified mortar, add approximately 3 gal (11.36 L) of TAMMSWELD per 100 lbs (45.4 kg) of cement content in the mortar material. The properties achieved by using TAMMSWELD as a polymer modifier will vary depending on the composition of the mortar, and a thorough evaluation
of properties should be completed prior to using the polymer modified mix