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Working Temperature: For maximum performance use Weldbond at temperatures above 10C (50F) and on surfaces below 92C (200F). Storage: Do not allow Weldbond to freeze when in a liquid state. Store above 10C (50F). Bonding Exceptions: Some types of plastic, rubber and cast metals will not produce a bond with Weldbond including polyethylene, unbacked vinyl, PVC, Teflon, polypropylene, vinyl to vinyl, cast iron, cast aluminum and so-called "pot" metals. Note: Do not use when bonding containers designed for use with, or subject to, hot liquids. Surface preparation: Ensure all surfaces are clean. Remove all grease, oil, and dirt. For an optimal results, sand smooth or slick surfaces. Use a rust inhibiting primer before applying Weldbond to iron or steel surfaces. Drying Time: The longer it sets, the stronger it gets. On porous surfaces, Weldbond will be dry in about an hour, but you can tell it is fully cured and bonded when it becomes crystal clear. It will have have its maximum bond within a few days. The 5:1 sealant dries in about an hour. To apply: Apply Weldbond by squeezing the bottle and utilizing its non-clogging nozzle or apply with a sponge, brush, roller, or spray gun.
Weldbond can be diluted to make a plaster bonder. 1 gallon of Weldbond to 3 gallons of water, produces 4 gallons of plaster bonder.
Use 1 part Weldbond thinned with 10 parts water as you are mixing water in cement or concrete mix.