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Frequently Asked Questions

How does Weld-Crete® work?

Larsen Products Corp. Frequently Asked Questions
Weld-Crete® is applied as a liquid and as it dries to a thin, flexible film, it forms a tenacious bond to the structural surface. The dry film is reactivated by the moisture and chemical reaction that occurs as the new concrete cures. Full bonding strength is achieved after the new concrete has completely cured.

What is Weld-Crete®?

Larsen Products Corp. Frequently Asked Questions
Weld-Crete®, the original chemical bonding agent for concrete, is a safe, easy to use surface applied bonding agent that bonds new concrete to any clean, structurally sound surface. It has been specified and used by major architects, engineers and construction companies throughout the world since 1952.

Do procedures vary when two or three coat work is applied over Weld-Crete®?

Larsen Products Corp. Frequently Asked Questions
Only the base coat is bonded to Weld-Crete®. The base coat should be a minimum of 3/8". The base coat must be allowed to dry 24 hours before the finish coat is applied to prevent flooding of the bond line.

How is Weld-Crete® applied?

Larsen Products Corp. Frequently Asked Questions
Weld-Crete® can be applied by brush, roller, or spray. Do not dilute. When using spray equipment, the nozzle should permit a fog-type spray. Weld-Crete® should be applied in a thin, continuous, film. Do not permit Weld-Crete® to puddle in low areas.

What coverage can be expected for Weld-Crete®?

Larsen Products Corp. Frequently Asked Questions
Yes. Weld-Crete® becomes thicker in colder weather and coverage is reduced. Spraying becomes extremely difficult in cold weather. Do not apply in freezing weather. Do not apply over frozen surfaces.

What surfaces are suitable for Weld-Crete®?

Larsen Products Corp. Frequently Asked Questions
Weld-Crete® may be applied to any clean, structurally sound surface. Weld-Crete® may be applied over painted surfaces provided the paint is clean and well secured to the substrate.

What surface preparation is needed for Weld-Crete®?

Larsen Products Corp. Frequently Asked Questions
The surface must be clean and structurally sound. Dust, dirt, oil, grease, wax, loose paint, efflorescence, rust, mildew, and other foreign material must be completely removed. Weld-Crete® may be painted over painted surfaces provided the paint is still well secured to the substrate.

Should Weld-Crete® freeze, will it harm the product?

Larsen Products Corp. Frequently Asked Questions
No. Weld-Crete® is freeze thaw stable; however, it is preferable to prevent freezing. Allow frozen Weld-Crete® to thaw at room temperature.

When can new concrete be applied to Weld-Crete®?

Larsen Products Corp. Frequently Asked Questions
New concrete can be applied over Weld-Crete® when it is dry to the touch, usually within one hour, up to ten days later, provided that the Weld-Crete® film is kept clean.

How does an Engrave-A-Crete® Super Compact or Mongoose concrete engraver work?

Frequently Asked Questions& General Information&...
It's a coordinated action where the operator is guiding and propelling the engraver and in turn the engraver and the tracking system are guiding the operator. The pattern is cut into the concrete with a unique diamond saw blade mounted in the engraving machine.

Is Weld-Crete® a water retardant or water barrier?

Larsen Products Corp. Frequently Asked Questions
Once the new concrete is fully cured, Weld-Crete® is unaffected by humidity or condensation. It is not intended for use as a water barrier. It is not recommended for use where hydrostatic pressure is present.

How can Weld-Crete® be removed from surfaces that have been accidently coated?

Larsen Products Corp. Frequently Asked Questions
Wet Weld-Crete® is easily removed with hot water. Dried Weld-Crete® is much more difficult to remove. Chemical solvents such as acetone, methyl isobutyl ketone, or cyclohexanone may be used.

How does Engrave-A-Crete® accept payment?

Frequently Asked Questions& General Information&...
You may purchase your equipment using any of several different methods. We accept Visa, MasterCard, Discover, American Express, cash, cashiers check and wire transfer. We happily accept business or personal checks but the bank requires we wait 7 to 10 business days for the check to clear before shipping your equipment. If you are financing through a leasing company, we can ship as soon as they give us the go ahead .

What is the Engrave-A-Crete® System?

Frequently Asked Questions& General Information&...
The Engrave-A-Crete? System consists of several combined processes that remodel concrete to produce a pleasing appearance. Briefly, a deep penetrating acrylic or chemical/acid stain is used to transform the color, then a permanent, precise, pattern is engraved (cut) INTO the hard concrete with our patented concrete engravers. The Engrave-A-Crete? Process is NOT a topping or overlayment that could chip off.

How much do I weld?

Direct Sheet Metal Frequently Asked Questions
When welding in a floor and tunnel, use a rosette weld about 3" to 4" apart. It is not necessary to weld the entire edge of a floor. This will cause severe warpage (too much heat). When welding in a firewall, weld back through the holes you drilled to remove the stock firewall. DO NOT START ON ONE SIDE AND WELD ALL THE WAY TO THE OTHER SIDE.

I can't get to the back of the tube to work on my steel. Can I still weld it?

Frequently asked questions about Muggy Weld's Super Alloys
If you can rub the flux onto the back while heating the sides, the rod will flow all the way around your parent metal to seal the tube [back to top]

Will J-B Weld work on an automotive exhaust?

J-B Weld Company - Frequently Asked Questions
Because of the extreme temperatures of exhaust systems, we do not recommend J-B Weld for use on exhaust manifolds and catalytic converters. Nor do we recommend the product for repairs within the combustion chamber.

Why does the Henrob 2000 weld cast iron better than a conventional torch?

FAQs on the DHC 2000 / Henrob 2000 oxyacetylene torch
The low turbulence and oxygen content along with the clean burning characteristics of the flame is less likely to introduce oxygen/carbon contamination into the weld puddle which causes a hard weld and possible cracking.

How does a wire feed welder shield the weld?

Schumacher Electric | FAQ
with a stick welder, the very hot arc area must be kept shielded from the air. There are two ways to do this with a wire feed welder. You can use a flux cored welding wire - this wire is just like a welding rod except that the flux is inside the wire instead of outside. When the arc is started, the flux burns and forces the air away from the weld. It also forms a slag coating that shields the completed weld.

How does it work?

Poison Ivy Treatment - Zanfel Poison Ivy Wash Frequently Ask...
Zanfel works safely into the dermal layer of your skin, binds to the urushiol oil, and, when rinsed off, takes the oil with it down the drain.
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