Non Hydraulic Mortar/Plaster - Coarse Stuff


inc. VAT


Size: 25kg bag

Colour: Chalk White

Haired: Unhaired

Chalk White Oatmeal


How is non hydraulic lime plaster/mortar made?

Our non hydraulic coarse stuff lime plaster is made on site using our CHALK LIME PUTTY and a blend of GRIT SAND and WAREHAM WASHED SAND. It is supplied as a ready mix, meaning it is easy to use straight from the tub or bag.

  • Ideal for backing coats of internal plasters or exterior render.
  • The limestone and flint grit makes it ideal for flint work or pointing rubble stone as the combination maintains the white mortar colour with flecks of dark particles.
  • Available in 25kg tubs or 25kg bags. Or for larger orders, choose a half tonne bag, a tonne bag or a full pallet of 25kg bags.

What is non hydraulic lime?

Non hydraulic lime is lime in its purest form. It sets in contact with air through a process of carbonation.  The slow setting process means non hydraulic lime remains softer and more breathable. It is good for internal plasterwork and for use on soft backgrounds such as cob, soft stone or friable material. There is more information on the differences between hydraulic and non hydraulic limes in our User Guide WHICH LIME? 

Applying non hydraulic lime

Lime putty plaster has a long shelf life if kept within the airtight containers. If left for a period of time, it will start to settle and simply require 'knocking up' before use.

It is important that there is no risk of frost when applying non hydraulic lime mortars. Ice crystals forming within the lime mortar will greatly increase the time it will take the carbonisation process to take place. Using HESSIAN as an insulation barrier will protect from frost action and is vital during the winter months.

Teasing animal hair into the lime putty plaster just before use will increase the tensile strength of the plaster. The hair acts as a natural reinforcement and effective bonding key. We supply HORSE HAIR in 100g bundles. Or have a look at our user guide on ADDITIVES FOR LIME PLASTER.

Download Technical Data Sheet Here.


**If you are ordering a large quantity to arrive by pallet, please advise us of any site or access restrictions at the time of ordering.  Please be aware that delivery will be via a nationwide pallet service that will not provide a crane offload.  See our delivery terms and conditions for more details.**



As a Backing Coat of Plaster

1 tonne will plaster 48m sq @ 10mm thickness. A 25kg tub/bag will cover 1.2m sq @ 10mm

As a Finish Coat of Plaster

1 tonne will plaster 120m sq @ 3mm thickness. A 25kg tub/bag will cover 2.5 - 3.5m sq @ 3mm

For Pointing

1 tonne will point 100 - 120m sq of stonework. A 25kg tub/bag will point 4m sq in standard joints.

For Laying Bricks

1 tonne will lay approximately 900 bricks

Customer Reviews ()


Finish made easier - Traditional material to match with existing mortar used to repoint and repair mixed stone and flint wall. Bagged ready mixed mortar with consistent grading makes working easier. Quality material at a reasonable cost. 2018-07-29

A really attractive all-purpose mix - This coarse stuff knocks up in moments to an excellent, easy working mortar or pointing which cures to the right balance of strength without excessive hardness, for both softer and harder stonework. I have found the creamy oatmeal colour takes only the smallest amount of pigment when this is required. Christopher Gingell 2018-09-21

Church re-plastering - We are at present using several tons of haired coarse stuff as a base coat followed by medium stuff unhaired top coat to re-plaster a a church after removal of 1960s cement and sand plaster The materials arrived on site on the day requested even though it was a short notice order the quality is consistent across the entire order. This was the first time we have used this company before but it won’t be the last Steve Strickland A M Strickland Builders 2019-06-13

Convenient and easy to use - A very good product for both repairing walls and for pointing stone walls. Convenient tub means mortar is ready to use and does not go off. Easy to work with. Ed 2016-05-20

repointing a 1600's barn - the premixed mortar/plaster has worked out perfectly on the old walls, and both the finish and texture are great - the premised tubs made the whole process pretty painless. Having followed the instructions in the 'Old House Handbook' the result is excellent and i hope the person who originally built the building in the 1600's would approve of the restoration. anna jeffreys 2016-07-07

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