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NATCEM AC





 Method of use  Application



 Preparing the surface  Priming  General  Setting times  Storage               How to specify
 Do not use on frozen or   There is no need to prime any   Place the material as quickly   NATCEM AC is designed to   NATCEM AC is packaged in a   NATCEM AC shall be mixed and
 overheated substrates (Outside   reinforcement, but if priming   as possible after mixing using   commence setting at 35 minutes   polythene inner bag with  applied to prepared surfaces all
 the range of 0˚c-30˚c). Prepare the   is preferred, any conventional   traditional tools. A 3mm minimum   and finish setting at 40 minutes at   re-sealable tie in a stitch sealed   strictly in accordance with the
 surface in advance to provide an   system may be used.  thickness of the material is   20˚c. In winter NATCEM AC can   woven polypropylene outer bag   manufacturer’s instructions.
 adequate key. It should be clean,   On reinforcement it is only   always necessary. DO NOT apply   be used down to 0˚c. The set will   that should be stored in dry
 free from dust and thoroughly   necessary to remove the loose  additional water to the surface   be slower but can be accelerated   conditions and will remain usable   Precautions
 dampened. Where necessary   rust, which can be done by wire  during finishing as this may cause   by using warm water. In very hot   for at least twelve months.  We strongly recommend the
 steel or aluminium mesh can   brushing.  surface cracking. Once setting   temperatures the set will be faster   use of GLOVES, GOGGLES and
 be used. Ensure that a 3mm   has started DO NOT attempt to   and can be slowed by using cold   Yield  MASK. Please see SDS sheet
 minimum thickness of material is   remix or to smooth the surface,   water.  Generally 1 x 25kg bag of   for full details.
 obtained.  this will cause the mechanical    NATCEM AC mixed with 5 litres of
 properties in particular strength   Cleaning  water will produce approximately   Approved to Reg 31 for
 and adhesion to be lost.  NATCEM AC should be removed   10 litres of finish mortar.   use in  public water
            from tools and equipment and                                       supplies. Secretary of
 Mixing     cleaned with water immediately    Disposal of Waste                state for D.E.T.R.
 APPLICATION BY TROWEL  after use.            Via an authorised waste disposal  Approved.
 If one bag or less is to be mixed it should be mixed with a rose bud type paddle attached to an electric drill  contractor to an approved waste  6th May 2015
 (900 rpm, 1000 W). Mix vigorously for at least 2 minutes after adding all the mixture to the water. NATCEM AC   disposal site, observing all local  DWI 56.4.840
 is designed to give a fluid mix but this only develops after sufficient mixing. For larger quantities, optimum mix   and national regulations.
 results can be obtained using conventional mixing machines. When applying by plastering methods, add the
 NATCEM AC gradually to 5 litres of clean water per bag, whilst mixing continuously. The mix will appear dry  Setting time & strength gain
 at first. Continue mixing until fluidity develops. If greater fluidity is required additional water may be added to a
 total of 5.5 litres per bag. Exceeding this ratio will lead to lower strength and a longer setting time. In cold weather  Start Set   35 Min  at 20°c
 the set can be accelerated using warm water, likewise in hot weather cold water can be used to slow down the  End Set   40 Min  at 20°c
 set.
                                                            Compressive
 APPLICATION BY BRUSH OR ROLLER                            Strength (Mpa)
 If one bag or less is to be mixed it should be mixed with a rose bud type paddle attached to an electric drill
 (900 rpm, 1000 W). Mix vigorously for at least 2 minutes after adding all the mixture to the water. NATCEM AC   1 Hour  4
 is designed to give a fluid mix but this only develops after sufficient mixing. For larger quantities, optimum mix  3 Hours  5
 results can be obtained using conventional mixing machines. When applying by brush or roller methods, add  24 Hours   9
 the NATCEM AC gradually to 6 litres of clean water per bag, whilst mixing continuously. The mix will appear  7 Days  13
 dry at first. Continue mixing until fluidity develops. If greater fluidity is required additional water may be added  28 Days  32
 to a total of 6.5 litres per bag. Exceeding this ratio will lead to lower strength and a longer setting time. In cold
 weather the set can be accelerated using warm water, likewise in hot weather, cold water can be used to slow  Strength continues to develop thereafter.
 down the set. When applying by brush or roller, two coats may be necessary to ensure no pinholes and
 adequate 3 mm minimum thickness. Ensure that the first coat has set prior to application of the second coat
 and that the surface of the first coat is well wetted prior to the application of the second coat.









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