Technical Faqs
01 General Building
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I need to bond stainless steel plate 180sq (3mm thick) to concrete (precast unit). Which product do you recommend?
29th April 2008We have a number of bonding agents which would be suitable. For light duty, non-structural bonding, then I would recommend Fast Grab Construction Adhesive or Bond & Seal. For heavy duty, structural bonding, I would recommend Larfix E.
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I need to know the rate at which I should dilute Acraseal. Have you got a system to dilute and what equiptment is advised to spray this product on. Should I put Algicide or Acraseal on first on concrete tiles and slate?
30th June 2008Acraseal is supplied ready for use and should not be further diluted.
Acraseal should be applied by roller, brush or suitable sprayer e.g. Larsen Galvanised Spray Unit. When spraying care should be taken to avoid the overspray contaminating surrounding areas as the selaer will be very difficult to remove. Acraseal is solvent based - ensure adequate ventilation exists and read safety datasheet before use.
Where there is a build up of algae etc, apply Larsen Concentrated Algicide before sealing. Allow treated area to fully dry before applying any sealer. Where there is a very heavy build up of dirt, moss etc. it is often advisable to clean with a powerhose, then apply Algicide, allow to fully dry then seal as required.
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Is Larsen brick and patio cleaner harmful to plants?
16th June 2008Larsen Brick and Patio Cleaner is a Hydrochloric Acid based cleaning product. While it is not classified as 'Corrosive' it would be expected to damage acid sensitive surfaces and this could include plants. It is also possible that spillages on soil would upset the pH of the soil temporarily in the localised area and this too could be damaging to plants.
02 Concrete
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I am installing a 1700sq/ft freezer room that operates at a temperature of -25 oc (minus 25). I employed a contractor to power float the floor to give it a sealed finish, however the floor hardened too quickly. Apart from taking out the floor again (150mm fibre mesh, 40 newton concrete) is there a product available that will seal the floor, operate within a temp. of -25 and will withstand the combined weight of a forklift and pallet travelling on the floor on a regular basis. (combined weight is 2,500kg)??
17th March 2008Larsen Impregnation is a high quality, 2-pack epoxy sealer for concrete. It is ideal for use in industrial situations to seal and protect the floor. Impregnation will be suitable for a service temperarure -30 to +60oC.
03 Flooring
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Could you please recommend a product for raising a screed floor by 8-10mm. The screed has Underfloor heating and will be tiled.
13th June 2008Larsen Professional SLC 1500 would be the best product to use. This is a single pack (water mix) self-levelling compound for application from 0-25mm depth. It is suitable for use over underfloor heating.
For further information and datasheet, follow this link - SLC 1500
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There is currently a builders floor left on house hallway and this needs to rise 25mm. Can u advise what to put on the existing concrete floor to raise the level by 25mm prior to tiling
15th May 2008The floor level can be raised by 25mm by the application of Professional SLC1500. This a single part self levelling underlayment which can be applied up to 25mm in one layer. Consult the product datasheet for application information.
06 Others
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We use alot of timber to manufacture various crates/crating systems. We are looking into a sealant/preserver in case customers leave timber (or ply) crates outside in all conditions. Would you have any ideas?
26th June 2008Larsen Wood Preservative (Clear) can be used 'industrially' for the preservation of timber. The easiest method would be to spray (2 coats) or ideally dip the timber (~1 hour) to be treated. The timber to be treated should be as dry as possible to allow penetration of the preservative. Always test a trial area first. Please be aware that this product is solvent based and so adequate health and safety precautions should be taken as required. I would advise carrying out extensive trials with any plywood as the solvent may affect the glue binding the layers of ply.
